/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 16:13:28,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 16:13:28,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 16:13:28,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 16:13:28,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 16:13:28,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 16:13:28,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 16:13:28,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 16:13:28,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 16:13:28,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 16:13:28,317 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 16:13:28,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 16:13:28,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 16:13:28,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 16:13:28,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 16:13:28,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 16:13:28,326 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 16:13:28,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 16:13:28,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 16:13:28,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 16:13:28,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 16:13:28,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 16:13:28,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 16:13:28,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 16:13:28,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 16:13:28,355 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 16:13:28,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 16:13:28,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 16:13:28,363 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 16:13:28,363 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 16:13:28,364 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 16:13:28,364 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 16:13:28,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 16:13:28,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 16:13:28,370 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 16:13:28,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 16:13:28,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 16:13:28,371 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 16:13:28,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 16:13:28,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 16:13:28,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 16:13:28,376 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-15 16:13:28,416 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 16:13:28,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 16:13:28,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 16:13:28,421 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 16:13:28,421 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 16:13:28,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 16:13:28,422 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 16:13:28,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 16:13:28,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 16:13:28,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 16:13:28,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 16:13:28,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 16:13:28,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 16:13:28,425 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 16:13:28,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 16:13:28,425 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 16:13:28,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 16:13:28,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 16:13:28,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 16:13:28,426 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 16:13:28,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 16:13:28,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 16:13:28,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 16:13:28,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 16:13:28,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 16:13:28,428 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 16:13:28,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 16:13:28,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 16:13:28,429 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 16:13:28,429 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 16:13:28,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 16:13:28,739 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 16:13:28,743 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 16:13:28,744 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 16:13:28,744 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 16:13:28,745 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-10-15 16:13:28,806 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f118dfaeb/8e3a5b246d1c4ec5b62c4d221a19cd9c/FLAGef47d746a [2020-10-15 16:13:29,380 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 16:13:29,381 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-10-15 16:13:29,392 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f118dfaeb/8e3a5b246d1c4ec5b62c4d221a19cd9c/FLAGef47d746a [2020-10-15 16:13:29,648 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f118dfaeb/8e3a5b246d1c4ec5b62c4d221a19cd9c [2020-10-15 16:13:29,657 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 16:13:29,659 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 16:13:29,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 16:13:29,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 16:13:29,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 16:13:29,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:13:29" (1/1) ... [2020-10-15 16:13:29,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bff7853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:29, skipping insertion in model container [2020-10-15 16:13:29,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:13:29" (1/1) ... [2020-10-15 16:13:29,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 16:13:29,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 16:13:30,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 16:13:30,163 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 16:13:30,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 16:13:30,284 INFO L208 MainTranslator]: Completed translation [2020-10-15 16:13:30,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30 WrapperNode [2020-10-15 16:13:30,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 16:13:30,285 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 16:13:30,285 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 16:13:30,286 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 16:13:30,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30" (1/1) ... [2020-10-15 16:13:30,311 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30" (1/1) ... [2020-10-15 16:13:30,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 16:13:30,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 16:13:30,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 16:13:30,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 16:13:30,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30" (1/1) ... [2020-10-15 16:13:30,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30" (1/1) ... [2020-10-15 16:13:30,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30" (1/1) ... [2020-10-15 16:13:30,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30" (1/1) ... [2020-10-15 16:13:30,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30" (1/1) ... [2020-10-15 16:13:30,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30" (1/1) ... [2020-10-15 16:13:30,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30" (1/1) ... [2020-10-15 16:13:30,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 16:13:30,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 16:13:30,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 16:13:30,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 16:13:30,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 16:13:30,428 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-15 16:13:30,429 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-15 16:13:30,429 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-15 16:13:30,429 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-15 16:13:30,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 16:13:30,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-15 16:13:30,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 16:13:30,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 16:13:30,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-15 16:13:30,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 16:13:30,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 16:13:30,433 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-15 16:13:30,740 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 16:13:30,741 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-15 16:13:30,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:13:30 BoogieIcfgContainer [2020-10-15 16:13:30,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 16:13:30,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 16:13:30,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 16:13:30,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 16:13:30,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:13:29" (1/3) ... [2020-10-15 16:13:30,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685f8f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:13:30, skipping insertion in model container [2020-10-15 16:13:30,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:30" (2/3) ... [2020-10-15 16:13:30,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685f8f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:13:30, skipping insertion in model container [2020-10-15 16:13:30,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:13:30" (3/3) ... [2020-10-15 16:13:30,752 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2020-10-15 16:13:30,768 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 16:13:30,769 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 16:13:30,776 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 16:13:30,778 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 16:13:30,807 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,807 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,807 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,808 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,808 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,809 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,809 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,809 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,810 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,810 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,810 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,811 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,811 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,811 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,811 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,812 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,812 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,812 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,813 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,813 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,813 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,814 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,814 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,814 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,815 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,815 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,815 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,815 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,816 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,816 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,820 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,820 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,820 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,820 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,821 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,821 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,834 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,835 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,835 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,835 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,835 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,835 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:30,854 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-15 16:13:30,871 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 16:13:30,871 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 16:13:30,871 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 16:13:30,872 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 16:13:30,872 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 16:13:30,872 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 16:13:30,872 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 16:13:30,872 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 16:13:30,885 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 16:13:30,888 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-15 16:13:30,890 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-15 16:13:30,892 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-15 16:13:30,932 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-15 16:13:30,933 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 16:13:30,939 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. [2020-10-15 16:13:30,942 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-15 16:13:32,000 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-15 16:13:32,115 INFO L132 LiptonReduction]: Checked pairs total: 1052 [2020-10-15 16:13:32,115 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-15 16:13:32,122 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-15 16:13:32,137 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-15 16:13:32,139 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-15 16:13:32,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-15 16:13:32,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:32,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-15 16:13:32,147 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:32,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-10-15 16:13:32,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:32,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207506862] [2020-10-15 16:13:32,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:32,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207506862] [2020-10-15 16:13:32,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:32,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 16:13:32,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142948689] [2020-10-15 16:13:32,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 16:13:32,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:32,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 16:13:32,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 16:13:32,415 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-15 16:13:32,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:32,475 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-15 16:13:32,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 16:13:32,477 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-15 16:13:32,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:32,489 INFO L225 Difference]: With dead ends: 83 [2020-10-15 16:13:32,490 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 16:13:32,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:13:32,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 16:13:32,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-15 16:13:32,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:13:32,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-15 16:13:32,529 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-15 16:13:32,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:32,530 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-15 16:13:32,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 16:13:32,530 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-15 16:13:32,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 16:13:32,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:32,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:32,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 16:13:32,532 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:32,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:32,532 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-10-15 16:13:32,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:32,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933247120] [2020-10-15 16:13:32,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:32,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933247120] [2020-10-15 16:13:32,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:32,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 16:13:32,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552449855] [2020-10-15 16:13:32,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 16:13:32,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:32,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 16:13:32,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:13:32,654 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-15 16:13:32,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:32,711 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-15 16:13:32,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:32,711 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 16:13:32,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:32,713 INFO L225 Difference]: With dead ends: 80 [2020-10-15 16:13:32,713 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 16:13:32,718 INFO L677 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 [2020-10-15 16:13:32,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 16:13:32,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-15 16:13:32,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 16:13:32,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-15 16:13:32,729 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-15 16:13:32,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:32,730 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-15 16:13:32,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 16:13:32,730 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-15 16:13:32,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 16:13:32,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:32,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:32,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 16:13:32,732 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:32,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:32,733 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-10-15 16:13:32,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:32,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271637092] [2020-10-15 16:13:32,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:32,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271637092] [2020-10-15 16:13:32,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:32,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 16:13:32,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370412761] [2020-10-15 16:13:32,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 16:13:32,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:32,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 16:13:32,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:13:32,853 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-15 16:13:32,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:32,893 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-15 16:13:32,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 16:13:32,895 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 16:13:32,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:32,897 INFO L225 Difference]: With dead ends: 73 [2020-10-15 16:13:32,897 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 16:13:32,897 INFO L677 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 [2020-10-15 16:13:32,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 16:13:32,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-15 16:13:32,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:13:32,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-15 16:13:32,916 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-15 16:13:32,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:32,916 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-15 16:13:32,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 16:13:32,917 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-15 16:13:32,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 16:13:32,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:32,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:32,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 16:13:32,918 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:32,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:32,919 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-10-15 16:13:32,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:32,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132440805] [2020-10-15 16:13:32,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:32,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132440805] [2020-10-15 16:13:32,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:32,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 16:13:32,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112775185] [2020-10-15 16:13:32,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 16:13:32,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:32,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 16:13:32,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:13:32,975 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-15 16:13:33,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:33,037 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-15 16:13:33,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:33,037 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 16:13:33,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:33,039 INFO L225 Difference]: With dead ends: 86 [2020-10-15 16:13:33,039 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 16:13:33,040 INFO L677 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 [2020-10-15 16:13:33,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 16:13:33,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-15 16:13:33,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:13:33,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-15 16:13:33,049 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-15 16:13:33,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:33,050 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-15 16:13:33,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 16:13:33,050 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-15 16:13:33,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 16:13:33,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:33,051 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:33,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 16:13:33,052 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:33,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:33,052 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-10-15 16:13:33,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:33,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680735014] [2020-10-15 16:13:33,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:33,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:33,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680735014] [2020-10-15 16:13:33,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560747207] [2020-10-15 16:13:33,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:33,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:33,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:33,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:13:33,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:33,296 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:33,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:33,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-15 16:13:33,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232485660] [2020-10-15 16:13:33,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:13:33,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:33,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:13:33,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:13:33,320 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-15 16:13:33,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:33,400 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-15 16:13:33,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:33,400 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-15 16:13:33,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:33,402 INFO L225 Difference]: With dead ends: 101 [2020-10-15 16:13:33,402 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 16:13:33,402 INFO L677 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 [2020-10-15 16:13:33,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 16:13:33,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-15 16:13:33,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 16:13:33,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-15 16:13:33,411 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-15 16:13:33,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:33,411 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-15 16:13:33,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:13:33,411 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-15 16:13:33,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 16:13:33,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:33,413 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:33,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:33,627 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:33,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:33,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-10-15 16:13:33,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:33,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585208645] [2020-10-15 16:13:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:33,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585208645] [2020-10-15 16:13:33,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433616468] [2020-10-15 16:13:33,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:33,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:33,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:33,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:13:33,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:33,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:33,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 16:13:33,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628122123] [2020-10-15 16:13:33,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:13:33,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:33,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:13:33,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:33,869 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-15 16:13:33,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:33,898 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-15 16:13:33,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 16:13:33,898 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 16:13:33,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:33,899 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:13:33,899 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 16:13:33,900 INFO L677 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 [2020-10-15 16:13:33,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 16:13:33,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-15 16:13:33,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:13:33,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-15 16:13:33,907 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-15 16:13:33,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:33,908 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-15 16:13:33,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:13:33,908 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-15 16:13:33,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 16:13:33,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:33,909 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:34,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:34,123 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:34,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:34,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-10-15 16:13:34,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:34,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611580144] [2020-10-15 16:13:34,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:34,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611580144] [2020-10-15 16:13:34,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697181693] [2020-10-15 16:13:34,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:34,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:34,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:34,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:13:34,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:34,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:34,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 16:13:34,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648457507] [2020-10-15 16:13:34,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:13:34,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:34,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:13:34,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:34,329 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-15 16:13:34,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:34,397 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-15 16:13:34,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:34,397 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 16:13:34,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:34,399 INFO L225 Difference]: With dead ends: 90 [2020-10-15 16:13:34,399 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 16:13:34,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:13:34,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 16:13:34,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-15 16:13:34,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:13:34,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-15 16:13:34,414 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-15 16:13:34,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:34,415 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-15 16:13:34,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:13:34,419 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-15 16:13:34,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 16:13:34,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:34,421 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:34,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:34,639 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:34,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:34,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-10-15 16:13:34,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:34,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006831459] [2020-10-15 16:13:34,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:34,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006831459] [2020-10-15 16:13:34,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427218642] [2020-10-15 16:13:34,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:34,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:34,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:34,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:13:34,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:34,790 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:34,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:34,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:34,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 16:13:34,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931759108] [2020-10-15 16:13:34,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:13:34,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:34,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:13:34,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:34,803 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-15 16:13:34,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:34,893 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-15 16:13:34,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:34,894 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 16:13:34,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:34,895 INFO L225 Difference]: With dead ends: 99 [2020-10-15 16:13:34,895 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:13:34,895 INFO L677 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 [2020-10-15 16:13:34,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:13:34,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-15 16:13:34,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 16:13:34,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-15 16:13:34,902 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-15 16:13:34,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:34,903 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-15 16:13:34,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:13:34,903 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-15 16:13:34,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:34,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:34,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:35,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:35,116 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:35,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:35,117 INFO L82 PathProgramCache]: Analyzing trace with hash 483638869, now seen corresponding path program 1 times [2020-10-15 16:13:35,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:35,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330047602] [2020-10-15 16:13:35,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:35,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330047602] [2020-10-15 16:13:35,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:35,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:13:35,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288587988] [2020-10-15 16:13:35,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:13:35,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:35,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:13:35,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:35,181 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-15 16:13:35,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:35,216 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-15 16:13:35,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 16:13:35,217 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:13:35,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:35,218 INFO L225 Difference]: With dead ends: 92 [2020-10-15 16:13:35,218 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 16:13:35,219 INFO L677 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 [2020-10-15 16:13:35,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 16:13:35,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-15 16:13:35,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 16:13:35,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-15 16:13:35,236 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-15 16:13:35,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:35,237 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-15 16:13:35,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:13:35,237 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-15 16:13:35,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:35,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:35,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:35,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 16:13:35,239 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:35,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:35,241 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 2 times [2020-10-15 16:13:35,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:35,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592216035] [2020-10-15 16:13:35,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:35,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592216035] [2020-10-15 16:13:35,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:35,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:13:35,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403864521] [2020-10-15 16:13:35,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:13:35,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:35,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:13:35,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:35,324 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-15 16:13:35,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:35,368 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-15 16:13:35,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:35,369 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:13:35,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:35,370 INFO L225 Difference]: With dead ends: 100 [2020-10-15 16:13:35,370 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:13:35,370 INFO L677 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 [2020-10-15 16:13:35,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:13:35,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-15 16:13:35,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 16:13:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-15 16:13:35,375 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-15 16:13:35,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:35,376 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-15 16:13:35,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:13:35,376 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-15 16:13:35,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:35,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:35,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:35,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 16:13:35,377 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:35,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:35,378 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 3 times [2020-10-15 16:13:35,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:35,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475725108] [2020-10-15 16:13:35,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:35,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475725108] [2020-10-15 16:13:35,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:35,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:13:35,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721233299] [2020-10-15 16:13:35,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:13:35,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:35,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:13:35,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:35,434 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-15 16:13:35,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:35,501 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-15 16:13:35,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:35,502 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:13:35,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:35,503 INFO L225 Difference]: With dead ends: 105 [2020-10-15 16:13:35,503 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 16:13:35,503 INFO L677 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 [2020-10-15 16:13:35,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 16:13:35,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-15 16:13:35,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:13:35,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-15 16:13:35,508 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-15 16:13:35,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:35,508 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-15 16:13:35,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:13:35,508 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-15 16:13:35,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:35,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:35,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:35,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 16:13:35,510 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:35,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:35,510 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 4 times [2020-10-15 16:13:35,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:35,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292060168] [2020-10-15 16:13:35,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:35,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:35,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292060168] [2020-10-15 16:13:35,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:35,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:13:35,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52075680] [2020-10-15 16:13:35,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:13:35,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:35,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:13:35,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:35,557 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-15 16:13:35,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:35,637 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-15 16:13:35,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:35,638 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:13:35,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:35,640 INFO L225 Difference]: With dead ends: 105 [2020-10-15 16:13:35,640 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 16:13:35,640 INFO L677 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 [2020-10-15 16:13:35,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 16:13:35,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-15 16:13:35,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:13:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-15 16:13:35,644 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-15 16:13:35,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:35,645 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-15 16:13:35,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:13:35,645 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-15 16:13:35,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:35,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:35,646 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:35,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 16:13:35,646 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:35,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:35,646 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-10-15 16:13:35,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:35,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514967820] [2020-10-15 16:13:35,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:35,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514967820] [2020-10-15 16:13:35,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815133220] [2020-10-15 16:13:35,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:35,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:35,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:35,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:35,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:35,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:35,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:35,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-15 16:13:35,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30353899] [2020-10-15 16:13:35,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:13:35,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:35,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:13:35,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:13:35,859 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-15 16:13:35,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:35,955 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-15 16:13:35,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:35,956 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-15 16:13:35,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:35,957 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:13:35,957 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:13:35,957 INFO L677 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 [2020-10-15 16:13:35,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:13:35,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-15 16:13:35,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:13:35,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-15 16:13:35,962 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-15 16:13:35,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:35,962 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-15 16:13:35,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:13:35,962 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-15 16:13:35,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:35,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:35,963 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:36,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-15 16:13:36,174 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:36,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:36,175 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-10-15 16:13:36,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:36,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232331035] [2020-10-15 16:13:36,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:36,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232331035] [2020-10-15 16:13:36,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660617728] [2020-10-15 16:13:36,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:36,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:36,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:36,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:36,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:36,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:36,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:36,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234681810] [2020-10-15 16:13:36,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:36,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:36,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:36,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:36,371 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-15 16:13:36,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:36,402 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-15 16:13:36,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:36,403 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 16:13:36,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:36,404 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:13:36,404 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 16:13:36,404 INFO L677 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 [2020-10-15 16:13:36,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 16:13:36,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-15 16:13:36,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 16:13:36,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-15 16:13:36,408 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-15 16:13:36,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:36,409 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-15 16:13:36,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:36,409 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-15 16:13:36,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:36,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:36,410 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:36,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:36,621 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:36,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:36,622 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-10-15 16:13:36,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:36,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835165260] [2020-10-15 16:13:36,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:36,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835165260] [2020-10-15 16:13:36,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200200016] [2020-10-15 16:13:36,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:36,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:36,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:36,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:36,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:36,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128464494] [2020-10-15 16:13:36,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:36,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:36,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:36,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:36,848 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-15 16:13:36,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:36,927 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-15 16:13:36,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:36,928 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 16:13:36,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:36,929 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:13:36,929 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:13:36,930 INFO L677 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 [2020-10-15 16:13:36,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:13:36,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-15 16:13:36,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:13:36,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-15 16:13:36,935 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-15 16:13:36,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:36,936 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-15 16:13:36,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:36,936 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-15 16:13:36,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:36,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:36,937 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:37,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-15 16:13:37,150 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:37,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:37,179 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-10-15 16:13:37,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:37,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307164857] [2020-10-15 16:13:37,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:37,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307164857] [2020-10-15 16:13:37,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165450650] [2020-10-15 16:13:37,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:37,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:37,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:37,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:37,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:37,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:37,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:37,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921289975] [2020-10-15 16:13:37,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:37,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:37,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:37,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:37,413 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-15 16:13:37,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:37,493 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-15 16:13:37,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:37,494 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 16:13:37,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:37,495 INFO L225 Difference]: With dead ends: 115 [2020-10-15 16:13:37,495 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 16:13:37,496 INFO L677 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 [2020-10-15 16:13:37,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 16:13:37,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-15 16:13:37,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:13:37,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-15 16:13:37,502 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-15 16:13:37,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:37,503 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-15 16:13:37,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:37,503 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-15 16:13:37,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:37,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:37,504 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:37,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-15 16:13:37,716 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:37,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:37,717 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-10-15 16:13:37,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:37,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957059533] [2020-10-15 16:13:37,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:37,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957059533] [2020-10-15 16:13:37,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650650181] [2020-10-15 16:13:37,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:37,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:37,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:37,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:37,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:37,870 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:37,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:37,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:37,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221088342] [2020-10-15 16:13:37,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:37,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:37,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:37,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:37,883 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-15 16:13:37,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:37,998 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-15 16:13:37,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:37,999 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 16:13:37,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:38,000 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:13:38,000 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:13:38,000 INFO L677 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 [2020-10-15 16:13:38,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:13:38,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-15 16:13:38,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:13:38,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-15 16:13:38,005 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-15 16:13:38,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:38,005 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-15 16:13:38,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:38,006 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-15 16:13:38,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:38,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:38,006 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:38,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 16:13:38,207 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:38,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:38,208 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 5 times [2020-10-15 16:13:38,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:38,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638070574] [2020-10-15 16:13:38,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:38,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:38,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638070574] [2020-10-15 16:13:38,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647916833] [2020-10-15 16:13:38,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:38,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:38,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:38,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:38,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:38,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:38,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:38,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696718277] [2020-10-15 16:13:38,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:38,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:38,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:38,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:38,387 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-15 16:13:38,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:38,428 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-15 16:13:38,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:38,429 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:38,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:38,430 INFO L225 Difference]: With dead ends: 113 [2020-10-15 16:13:38,430 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 16:13:38,430 INFO L677 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 [2020-10-15 16:13:38,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 16:13:38,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-15 16:13:38,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 16:13:38,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-15 16:13:38,434 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-15 16:13:38,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:38,434 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-15 16:13:38,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-15 16:13:38,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:38,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:38,435 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:38,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 16:13:38,645 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:38,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:38,646 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 6 times [2020-10-15 16:13:38,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:38,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234345246] [2020-10-15 16:13:38,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:38,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234345246] [2020-10-15 16:13:38,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990407231] [2020-10-15 16:13:38,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:38,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:38,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:38,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:38,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:38,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:38,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:38,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:38,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132267432] [2020-10-15 16:13:38,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:38,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:38,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:38,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:38,829 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-15 16:13:38,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:38,897 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-15 16:13:38,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:38,898 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:38,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:38,899 INFO L225 Difference]: With dead ends: 118 [2020-10-15 16:13:38,899 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 16:13:38,899 INFO L677 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 [2020-10-15 16:13:38,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 16:13:38,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-15 16:13:38,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 16:13:38,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-15 16:13:38,902 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-15 16:13:38,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:38,902 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-15 16:13:38,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:38,902 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-15 16:13:38,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:38,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:38,903 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:39,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:39,115 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:39,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:39,115 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 7 times [2020-10-15 16:13:39,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:39,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311842544] [2020-10-15 16:13:39,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:39,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311842544] [2020-10-15 16:13:39,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789686637] [2020-10-15 16:13:39,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:39,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:39,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:39,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:39,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:39,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645811268] [2020-10-15 16:13:39,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:39,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:39,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:39,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:39,308 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-15 16:13:39,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:39,389 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-15 16:13:39,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:39,389 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:39,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:39,390 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:13:39,391 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:13:39,391 INFO L677 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 [2020-10-15 16:13:39,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:13:39,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-15 16:13:39,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:13:39,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-15 16:13:39,395 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-15 16:13:39,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:39,396 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-15 16:13:39,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:39,396 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-15 16:13:39,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:39,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:39,397 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:39,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:39,608 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:39,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:39,609 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 8 times [2020-10-15 16:13:39,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:39,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876115894] [2020-10-15 16:13:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:39,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876115894] [2020-10-15 16:13:39,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65846255] [2020-10-15 16:13:39,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:39,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:39,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:39,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:39,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:39,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:39,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:39,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654299917] [2020-10-15 16:13:39,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:39,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:39,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:39,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:39,795 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-15 16:13:39,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:39,856 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-15 16:13:39,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:39,857 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:39,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:39,858 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:13:39,858 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 16:13:39,858 INFO L677 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 [2020-10-15 16:13:39,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 16:13:39,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-15 16:13:39,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 16:13:39,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-15 16:13:39,862 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-15 16:13:39,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:39,863 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-15 16:13:39,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:39,863 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-15 16:13:39,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:39,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:39,864 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:40,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-15 16:13:40,075 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:40,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:40,075 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 9 times [2020-10-15 16:13:40,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:40,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589950839] [2020-10-15 16:13:40,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:40,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589950839] [2020-10-15 16:13:40,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709650262] [2020-10-15 16:13:40,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:40,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:40,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:40,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:40,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:40,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:40,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:40,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110331983] [2020-10-15 16:13:40,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:40,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:40,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:40,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:40,279 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-15 16:13:40,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:40,363 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-15 16:13:40,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:40,364 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:40,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:40,365 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:13:40,365 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:13:40,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:40,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:13:40,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-15 16:13:40,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:13:40,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-15 16:13:40,369 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-15 16:13:40,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:40,369 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-15 16:13:40,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:40,370 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-15 16:13:40,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:40,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:40,370 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:40,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:40,582 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:40,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:40,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 10 times [2020-10-15 16:13:40,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:40,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80151336] [2020-10-15 16:13:40,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:40,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80151336] [2020-10-15 16:13:40,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994919333] [2020-10-15 16:13:40,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:40,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:40,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:40,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:40,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:40,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:40,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:40,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535125330] [2020-10-15 16:13:40,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:40,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:40,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:40,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:40,755 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-15 16:13:40,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:40,838 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-15 16:13:40,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:40,838 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:40,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:40,839 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:13:40,839 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:13:40,840 INFO L677 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 [2020-10-15 16:13:40,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:13:40,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-15 16:13:40,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-15 16:13:40,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-15 16:13:40,844 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-15 16:13:40,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:40,845 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-15 16:13:40,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:40,845 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-15 16:13:40,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:40,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:40,848 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:41,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-15 16:13:41,048 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:41,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:41,049 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 11 times [2020-10-15 16:13:41,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:41,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541439930] [2020-10-15 16:13:41,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:41,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541439930] [2020-10-15 16:13:41,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301903858] [2020-10-15 16:13:41,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:41,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:41,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:41,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:41,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:41,252 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:41,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:41,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:41,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:41,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324489852] [2020-10-15 16:13:41,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:41,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:41,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:41,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:41,296 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-15 16:13:41,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:41,470 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-15 16:13:41,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:41,470 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:41,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:41,472 INFO L225 Difference]: With dead ends: 133 [2020-10-15 16:13:41,472 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:13:41,473 INFO L677 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 [2020-10-15 16:13:41,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:13:41,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-15 16:13:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-15 16:13:41,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-15 16:13:41,478 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-15 16:13:41,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:41,479 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-15 16:13:41,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:41,479 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-15 16:13:41,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:41,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:41,480 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:41,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:41,693 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:41,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:41,694 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 12 times [2020-10-15 16:13:41,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:41,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751920119] [2020-10-15 16:13:41,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:41,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:41,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751920119] [2020-10-15 16:13:41,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817297625] [2020-10-15 16:13:41,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:41,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:41,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:41,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:41,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:41,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:41,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:41,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830651885] [2020-10-15 16:13:41,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:41,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:41,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:41,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:41,899 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-15 16:13:42,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:42,010 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-15 16:13:42,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:42,010 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:42,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:42,012 INFO L225 Difference]: With dead ends: 127 [2020-10-15 16:13:42,012 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 16:13:42,012 INFO L677 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 [2020-10-15 16:13:42,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 16:13:42,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-15 16:13:42,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:13:42,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-15 16:13:42,016 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-15 16:13:42,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:42,017 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-15 16:13:42,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:42,017 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-15 16:13:42,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:42,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:42,017 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:42,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-15 16:13:42,227 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:42,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:42,227 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 13 times [2020-10-15 16:13:42,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:42,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598238992] [2020-10-15 16:13:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:42,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598238992] [2020-10-15 16:13:42,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476197494] [2020-10-15 16:13:42,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:42,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:42,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:42,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:42,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:42,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:42,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106307499] [2020-10-15 16:13:42,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:42,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:42,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:42,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:42,375 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-15 16:13:42,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:42,584 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-15 16:13:42,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:13:42,584 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:42,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:42,586 INFO L225 Difference]: With dead ends: 141 [2020-10-15 16:13:42,586 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 16:13:42,586 INFO L677 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 [2020-10-15 16:13:42,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 16:13:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-15 16:13:42,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:13:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-15 16:13:42,590 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-15 16:13:42,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:42,590 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-15 16:13:42,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:42,591 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-15 16:13:42,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:42,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:42,591 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:42,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-15 16:13:42,792 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:42,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:42,792 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 14 times [2020-10-15 16:13:42,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:42,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703775792] [2020-10-15 16:13:42,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:42,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703775792] [2020-10-15 16:13:42,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653117488] [2020-10-15 16:13:42,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:42,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:42,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:42,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:42,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:42,924 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:42,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:42,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:42,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508847566] [2020-10-15 16:13:42,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:42,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:42,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:42,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:42,935 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-15 16:13:43,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:43,087 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-15 16:13:43,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:43,087 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:43,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:43,089 INFO L225 Difference]: With dead ends: 136 [2020-10-15 16:13:43,089 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 16:13:43,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:43,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 16:13:43,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-15 16:13:43,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 16:13:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-15 16:13:43,094 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-15 16:13:43,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:43,094 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-15 16:13:43,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:43,094 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-15 16:13:43,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:43,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:43,095 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:43,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-15 16:13:43,306 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:43,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:43,306 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 15 times [2020-10-15 16:13:43,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:43,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718325465] [2020-10-15 16:13:43,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:43,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718325465] [2020-10-15 16:13:43,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470232244] [2020-10-15 16:13:43,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:43,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:43,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:43,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:43,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:43,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:43,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:43,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819993761] [2020-10-15 16:13:43,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:43,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:43,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:43,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:43,485 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-15 16:13:43,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:43,574 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-15 16:13:43,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:43,574 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:43,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:43,575 INFO L225 Difference]: With dead ends: 130 [2020-10-15 16:13:43,576 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:13:43,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:43,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:13:43,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-15 16:13:43,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:13:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-15 16:13:43,579 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-15 16:13:43,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:43,580 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-15 16:13:43,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:43,580 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-15 16:13:43,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:43,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:43,581 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:43,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-15 16:13:43,790 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:43,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:43,790 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 16 times [2020-10-15 16:13:43,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:43,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541995924] [2020-10-15 16:13:43,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:43,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541995924] [2020-10-15 16:13:43,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470255383] [2020-10-15 16:13:43,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:43,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:43,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:43,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:43,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:43,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:43,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:43,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798551716] [2020-10-15 16:13:43,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:44,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:44,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:44,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:44,001 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-15 16:13:44,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:44,116 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-15 16:13:44,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:44,116 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:44,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:44,117 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:13:44,117 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 16:13:44,118 INFO L677 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 [2020-10-15 16:13:44,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 16:13:44,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-15 16:13:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 16:13:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-15 16:13:44,124 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-15 16:13:44,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:44,124 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-15 16:13:44,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:44,124 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-15 16:13:44,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:44,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:44,125 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:44,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-15 16:13:44,325 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:44,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:44,326 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 17 times [2020-10-15 16:13:44,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:44,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116870921] [2020-10-15 16:13:44,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:44,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116870921] [2020-10-15 16:13:44,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888073851] [2020-10-15 16:13:44,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:44,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:44,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:44,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:44,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:44,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:44,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:44,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:44,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394803414] [2020-10-15 16:13:44,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:44,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:44,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:44,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:44,490 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-15 16:13:44,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:44,613 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-15 16:13:44,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:44,614 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:44,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:44,615 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:13:44,616 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 16:13:44,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:44,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 16:13:44,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-15 16:13:44,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 16:13:44,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-15 16:13:44,620 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-15 16:13:44,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:44,620 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-15 16:13:44,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:44,620 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-15 16:13:44,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:44,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:44,621 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:44,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:44,832 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:44,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:44,832 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 18 times [2020-10-15 16:13:44,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:44,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507276130] [2020-10-15 16:13:44,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:44,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507276130] [2020-10-15 16:13:44,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334724057] [2020-10-15 16:13:44,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:44,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:44,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:44,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:44,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:44,964 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:44,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:44,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:44,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513407919] [2020-10-15 16:13:44,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:44,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:44,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:44,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:44,973 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-15 16:13:45,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:45,173 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-15 16:13:45,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:13:45,173 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:45,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:45,175 INFO L225 Difference]: With dead ends: 145 [2020-10-15 16:13:45,175 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 16:13:45,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:13:45,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 16:13:45,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-15 16:13:45,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:13:45,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-15 16:13:45,180 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-15 16:13:45,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:45,180 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-15 16:13:45,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:45,180 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-15 16:13:45,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:45,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:45,181 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:45,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-15 16:13:45,392 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:45,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:45,393 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 19 times [2020-10-15 16:13:45,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:45,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135103170] [2020-10-15 16:13:45,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:45,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135103170] [2020-10-15 16:13:45,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272780118] [2020-10-15 16:13:45,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:45,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:45,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:45,566 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:45,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:45,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:45,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579910894] [2020-10-15 16:13:45,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:45,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:45,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:45,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:45,580 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-15 16:13:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:45,755 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-15 16:13:45,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:45,756 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:45,757 INFO L225 Difference]: With dead ends: 135 [2020-10-15 16:13:45,757 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 16:13:45,757 INFO L677 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 [2020-10-15 16:13:45,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 16:13:45,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-15 16:13:45,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:13:45,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-15 16:13:45,761 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-15 16:13:45,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:45,761 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-15 16:13:45,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:45,761 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-15 16:13:45,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:45,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:45,762 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:45,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:45,973 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:45,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:45,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-10-15 16:13:45,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:45,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898298551] [2020-10-15 16:13:45,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:46,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898298551] [2020-10-15 16:13:46,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957266232] [2020-10-15 16:13:46,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:46,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:46,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:46,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:46,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:46,143 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:46,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:46,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:46,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-15 16:13:46,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089809178] [2020-10-15 16:13:46,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:13:46,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:46,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:13:46,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:46,163 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-15 16:13:46,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:46,278 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-15 16:13:46,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:46,280 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-15 16:13:46,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:46,282 INFO L225 Difference]: With dead ends: 143 [2020-10-15 16:13:46,282 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:13:46,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:13:46,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:13:46,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-15 16:13:46,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:13:46,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-15 16:13:46,289 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-15 16:13:46,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:46,290 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-15 16:13:46,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:13:46,290 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-15 16:13:46,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:46,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:46,291 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:46,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-15 16:13:46,504 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:46,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:46,505 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-10-15 16:13:46,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:46,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952674690] [2020-10-15 16:13:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:46,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952674690] [2020-10-15 16:13:46,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705599407] [2020-10-15 16:13:46,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:46,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:46,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:46,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:46,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:46,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:46,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:46,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827335339] [2020-10-15 16:13:46,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:46,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:46,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:46,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:46,758 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-15 16:13:46,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:46,799 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-15 16:13:46,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:46,799 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:46,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:46,800 INFO L225 Difference]: With dead ends: 132 [2020-10-15 16:13:46,800 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 16:13:46,801 INFO L677 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 [2020-10-15 16:13:46,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 16:13:46,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-15 16:13:46,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:13:46,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-15 16:13:46,805 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-15 16:13:46,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:46,805 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-15 16:13:46,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:46,805 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-15 16:13:46,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:46,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:46,806 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:47,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-15 16:13:47,015 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:47,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:47,016 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-10-15 16:13:47,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:47,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164580122] [2020-10-15 16:13:47,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:47,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164580122] [2020-10-15 16:13:47,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241808437] [2020-10-15 16:13:47,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:47,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:13:47,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:47,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:47,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:47,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:47,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:47,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113492257] [2020-10-15 16:13:47,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:47,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:47,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:47,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:47,230 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-15 16:13:47,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:47,287 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-15 16:13:47,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:47,287 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:47,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:47,288 INFO L225 Difference]: With dead ends: 143 [2020-10-15 16:13:47,288 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 16:13:47,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:47,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 16:13:47,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-15 16:13:47,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:13:47,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-15 16:13:47,292 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-15 16:13:47,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:47,292 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-15 16:13:47,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:47,292 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-15 16:13:47,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:47,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:47,293 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:47,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-15 16:13:47,502 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:47,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:47,503 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-10-15 16:13:47,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:47,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192370403] [2020-10-15 16:13:47,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:47,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192370403] [2020-10-15 16:13:47,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606042471] [2020-10-15 16:13:47,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:47,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:13:47,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:47,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:47,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:47,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:47,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:47,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599085965] [2020-10-15 16:13:47,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:47,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:47,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:47,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:47,736 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-15 16:13:47,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:47,838 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-15 16:13:47,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:47,839 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:47,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:47,840 INFO L225 Difference]: With dead ends: 142 [2020-10-15 16:13:47,840 INFO L226 Difference]: Without dead ends: 139 [2020-10-15 16:13:47,840 INFO L677 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 [2020-10-15 16:13:47,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-15 16:13:47,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-15 16:13:47,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-15 16:13:47,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-15 16:13:47,847 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-15 16:13:47,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:47,847 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-15 16:13:47,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:47,847 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-15 16:13:47,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:47,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:47,848 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:48,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-15 16:13:48,050 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:48,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:48,051 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-10-15 16:13:48,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:48,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325864273] [2020-10-15 16:13:48,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:48,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325864273] [2020-10-15 16:13:48,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532138727] [2020-10-15 16:13:48,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:48,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:48,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:48,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:48,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:48,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:48,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134147990] [2020-10-15 16:13:48,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:48,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:48,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:48,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:48,323 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-15 16:13:48,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:48,408 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-15 16:13:48,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:48,409 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:48,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:48,410 INFO L225 Difference]: With dead ends: 141 [2020-10-15 16:13:48,410 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:13:48,410 INFO L677 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 [2020-10-15 16:13:48,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:13:48,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-15 16:13:48,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-15 16:13:48,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-15 16:13:48,414 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-15 16:13:48,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:48,414 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-15 16:13:48,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:48,414 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-15 16:13:48,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:48,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:48,415 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:48,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-15 16:13:48,625 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:48,625 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-10-15 16:13:48,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:48,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931732042] [2020-10-15 16:13:48,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:48,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:48,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931732042] [2020-10-15 16:13:48,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79818784] [2020-10-15 16:13:48,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:48,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:48,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:48,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:48,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:48,845 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:48,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:48,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:48,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525591532] [2020-10-15 16:13:48,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:48,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:48,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:48,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:48,860 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-15 16:13:49,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:49,023 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-15 16:13:49,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:49,024 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:49,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:49,025 INFO L225 Difference]: With dead ends: 150 [2020-10-15 16:13:49,025 INFO L226 Difference]: Without dead ends: 144 [2020-10-15 16:13:49,026 INFO L677 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 [2020-10-15 16:13:49,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-15 16:13:49,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-15 16:13:49,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-15 16:13:49,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-15 16:13:49,029 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-15 16:13:49,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:49,030 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-15 16:13:49,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:49,030 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-15 16:13:49,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:49,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:49,030 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:49,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:49,239 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:49,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:49,240 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 20 times [2020-10-15 16:13:49,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:49,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064148441] [2020-10-15 16:13:49,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:49,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064148441] [2020-10-15 16:13:49,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747231760] [2020-10-15 16:13:49,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:49,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:49,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:49,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:49,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:49,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:49,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:49,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644002063] [2020-10-15 16:13:49,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:49,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:49,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:49,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:49,458 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-15 16:13:49,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:49,504 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-15 16:13:49,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:49,504 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:49,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:49,506 INFO L225 Difference]: With dead ends: 138 [2020-10-15 16:13:49,506 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 16:13:49,506 INFO L677 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 [2020-10-15 16:13:49,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 16:13:49,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-15 16:13:49,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-15 16:13:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-15 16:13:49,510 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-15 16:13:49,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:49,510 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-15 16:13:49,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:49,510 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-15 16:13:49,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:49,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:49,511 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:49,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-15 16:13:49,714 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:49,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:49,715 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 21 times [2020-10-15 16:13:49,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:49,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542088909] [2020-10-15 16:13:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:49,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542088909] [2020-10-15 16:13:49,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868360780] [2020-10-15 16:13:49,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:49,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:49,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:49,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:49,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:49,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:49,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:49,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902868435] [2020-10-15 16:13:49,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:49,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:49,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:49,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:49,924 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-15 16:13:50,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:50,018 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-15 16:13:50,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:50,018 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:50,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:50,020 INFO L225 Difference]: With dead ends: 145 [2020-10-15 16:13:50,020 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 16:13:50,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:13:50,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 16:13:50,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-15 16:13:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-15 16:13:50,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-15 16:13:50,024 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-15 16:13:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:50,025 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-15 16:13:50,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-15 16:13:50,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:50,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:50,026 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:50,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-15 16:13:50,235 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:50,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:50,236 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 22 times [2020-10-15 16:13:50,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:50,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228932455] [2020-10-15 16:13:50,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:50,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228932455] [2020-10-15 16:13:50,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693459356] [2020-10-15 16:13:50,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:50,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:50,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:50,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:50,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:50,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:50,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:50,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:50,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634795408] [2020-10-15 16:13:50,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:50,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:50,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:50,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:50,430 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-15 16:13:50,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:50,544 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-15 16:13:50,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:50,545 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:50,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:50,546 INFO L225 Difference]: With dead ends: 150 [2020-10-15 16:13:50,546 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 16:13:50,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:50,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 16:13:50,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-15 16:13:50,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-15 16:13:50,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-15 16:13:50,551 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-15 16:13:50,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:50,551 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-15 16:13:50,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:50,551 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-15 16:13:50,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:50,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:50,552 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:50,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:50,761 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:50,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:50,762 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 23 times [2020-10-15 16:13:50,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:50,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106425420] [2020-10-15 16:13:50,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:50,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106425420] [2020-10-15 16:13:50,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523700684] [2020-10-15 16:13:50,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:50,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:13:50,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:50,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:50,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:50,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:50,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:50,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175351913] [2020-10-15 16:13:50,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:50,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:50,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:50,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:50,958 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-15 16:13:51,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:51,065 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-15 16:13:51,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:51,066 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:51,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:51,067 INFO L225 Difference]: With dead ends: 148 [2020-10-15 16:13:51,067 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 16:13:51,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:51,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 16:13:51,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-15 16:13:51,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:51,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-15 16:13:51,071 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-15 16:13:51,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:51,071 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-15 16:13:51,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:51,071 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-15 16:13:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:51,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:51,072 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:51,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-15 16:13:51,282 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:51,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:51,282 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 24 times [2020-10-15 16:13:51,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:51,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944094072] [2020-10-15 16:13:51,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:51,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944094072] [2020-10-15 16:13:51,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678931415] [2020-10-15 16:13:51,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:51,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:51,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:51,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:51,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:51,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:51,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:51,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434048253] [2020-10-15 16:13:51,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:51,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:51,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:51,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:51,476 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-15 16:13:51,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:51,573 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-15 16:13:51,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:51,574 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:51,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:51,575 INFO L225 Difference]: With dead ends: 149 [2020-10-15 16:13:51,575 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 16:13:51,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:51,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 16:13:51,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-15 16:13:51,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:13:51,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-15 16:13:51,580 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-15 16:13:51,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:51,582 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-15 16:13:51,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:51,582 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-15 16:13:51,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:51,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:51,583 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:51,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:51,794 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:51,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:51,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1557695239, now seen corresponding path program 25 times [2020-10-15 16:13:51,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:51,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712689782] [2020-10-15 16:13:51,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:51,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712689782] [2020-10-15 16:13:51,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592733817] [2020-10-15 16:13:51,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:51,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:51,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:52,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:52,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:52,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:52,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578512359] [2020-10-15 16:13:52,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:52,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:52,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:52,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:52,037 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-15 16:13:52,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:52,098 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-15 16:13:52,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:52,098 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:52,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:52,099 INFO L225 Difference]: With dead ends: 152 [2020-10-15 16:13:52,100 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 16:13:52,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:52,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 16:13:52,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-15 16:13:52,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 16:13:52,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-15 16:13:52,104 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-15 16:13:52,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:52,104 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-15 16:13:52,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:52,104 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-15 16:13:52,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:52,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:52,105 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:52,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-15 16:13:52,316 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:52,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:52,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 26 times [2020-10-15 16:13:52,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:52,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287840579] [2020-10-15 16:13:52,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:52,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287840579] [2020-10-15 16:13:52,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484561812] [2020-10-15 16:13:52,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:52,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:52,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:52,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:52,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:52,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:52,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:52,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507220951] [2020-10-15 16:13:52,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:52,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:52,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:52,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:52,526 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-15 16:13:52,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:52,655 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-15 16:13:52,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:52,656 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:52,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:52,658 INFO L225 Difference]: With dead ends: 153 [2020-10-15 16:13:52,658 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 16:13:52,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:52,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 16:13:52,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-15 16:13:52,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:52,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-15 16:13:52,662 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-15 16:13:52,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:52,663 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-15 16:13:52,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:52,663 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-15 16:13:52,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:52,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:52,664 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:52,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-15 16:13:52,875 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:52,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:52,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 27 times [2020-10-15 16:13:52,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:52,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168237938] [2020-10-15 16:13:52,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:52,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168237938] [2020-10-15 16:13:52,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452553403] [2020-10-15 16:13:52,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:52,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:52,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:52,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:52,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:53,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:53,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:53,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521533435] [2020-10-15 16:13:53,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:53,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:53,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:53,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:53,078 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-15 16:13:53,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:53,220 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 16:13:53,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:53,221 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:53,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:53,222 INFO L225 Difference]: With dead ends: 156 [2020-10-15 16:13:53,223 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 16:13:53,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:13:53,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 16:13:53,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-15 16:13:53,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 16:13:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-15 16:13:53,228 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-15 16:13:53,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:53,228 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-15 16:13:53,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:53,228 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-15 16:13:53,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:53,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:53,229 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:53,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-15 16:13:53,438 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:53,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:53,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 28 times [2020-10-15 16:13:53,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:53,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832067124] [2020-10-15 16:13:53,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:53,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832067124] [2020-10-15 16:13:53,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620936280] [2020-10-15 16:13:53,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:53,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:53,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:53,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:53,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:53,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:53,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:53,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:53,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183882775] [2020-10-15 16:13:53,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:53,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:53,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:53,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:53,644 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-15 16:13:53,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:53,716 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-15 16:13:53,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:53,717 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:53,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:53,718 INFO L225 Difference]: With dead ends: 148 [2020-10-15 16:13:53,718 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 16:13:53,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:13:53,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 16:13:53,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-15 16:13:53,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:13:53,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-15 16:13:53,722 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-15 16:13:53,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:53,722 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-15 16:13:53,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:53,722 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-15 16:13:53,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:53,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:53,723 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:53,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-15 16:13:53,934 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:53,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:53,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 29 times [2020-10-15 16:13:53,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:53,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001101303] [2020-10-15 16:13:53,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:53,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001101303] [2020-10-15 16:13:53,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432092252] [2020-10-15 16:13:53,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:54,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:54,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:54,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:54,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:54,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:54,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:54,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645734622] [2020-10-15 16:13:54,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:54,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:54,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:54,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:54,132 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-15 16:13:54,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:54,286 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-15 16:13:54,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:54,286 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:54,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:54,287 INFO L225 Difference]: With dead ends: 157 [2020-10-15 16:13:54,287 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 16:13:54,288 INFO L677 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 [2020-10-15 16:13:54,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 16:13:54,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-15 16:13:54,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:54,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-15 16:13:54,291 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-15 16:13:54,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:54,291 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-15 16:13:54,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:54,292 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-15 16:13:54,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:54,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:54,292 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:54,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:54,502 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:54,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:54,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 30 times [2020-10-15 16:13:54,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:54,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362820070] [2020-10-15 16:13:54,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:54,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362820070] [2020-10-15 16:13:54,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923457723] [2020-10-15 16:13:54,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:54,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:54,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:54,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:13:54,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:54,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:54,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 16:13:54,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639970847] [2020-10-15 16:13:54,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:13:54,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:54,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:13:54,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:54,668 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-10-15 16:13:54,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:54,757 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-15 16:13:54,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:54,757 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 16:13:54,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:54,758 INFO L225 Difference]: With dead ends: 149 [2020-10-15 16:13:54,758 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 16:13:54,759 INFO L677 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 [2020-10-15 16:13:54,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 16:13:54,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-15 16:13:54,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 16:13:54,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 16:13:54,762 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 16:13:54,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:54,763 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 16:13:54,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:13:54,763 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 16:13:54,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:54,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:54,763 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:54,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-15 16:13:54,973 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:54,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:54,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 31 times [2020-10-15 16:13:54,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:54,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114560341] [2020-10-15 16:13:54,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:55,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114560341] [2020-10-15 16:13:55,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605680521] [2020-10-15 16:13:55,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:55,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:55,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:55,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:55,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:55,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:55,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002451105] [2020-10-15 16:13:55,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:55,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:55,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:55,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:55,186 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 16:13:55,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:55,415 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-15 16:13:55,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:55,415 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:55,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:55,416 INFO L225 Difference]: With dead ends: 164 [2020-10-15 16:13:55,417 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 16:13:55,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:13:55,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 16:13:55,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-15 16:13:55,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 16:13:55,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-15 16:13:55,420 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-15 16:13:55,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:55,421 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-15 16:13:55,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:55,421 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-15 16:13:55,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:55,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:55,421 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:55,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-15 16:13:55,632 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:55,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:55,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 32 times [2020-10-15 16:13:55,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:55,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173934885] [2020-10-15 16:13:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:55,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:55,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173934885] [2020-10-15 16:13:55,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833088677] [2020-10-15 16:13:55,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:55,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:55,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:55,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:55,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:55,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:55,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:55,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206693590] [2020-10-15 16:13:55,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:55,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:55,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:55,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:55,835 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-15 16:13:56,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:56,008 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 16:13:56,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:56,008 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:56,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:56,009 INFO L225 Difference]: With dead ends: 156 [2020-10-15 16:13:56,009 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 16:13:56,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:13:56,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 16:13:56,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-15 16:13:56,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 16:13:56,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 16:13:56,014 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 16:13:56,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:56,014 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 16:13:56,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:56,014 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 16:13:56,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:56,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:56,015 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:56,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:56,227 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:56,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:56,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 33 times [2020-10-15 16:13:56,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:56,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456191057] [2020-10-15 16:13:56,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:56,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:56,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456191057] [2020-10-15 16:13:56,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733403297] [2020-10-15 16:13:56,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:56,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:56,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:56,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:56,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:56,442 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:56,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:56,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:56,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816640631] [2020-10-15 16:13:56,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:56,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:56,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:56,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:56,471 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 16:13:56,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:56,816 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-15 16:13:56,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:13:56,816 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:56,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:56,818 INFO L225 Difference]: With dead ends: 176 [2020-10-15 16:13:56,818 INFO L226 Difference]: Without dead ends: 171 [2020-10-15 16:13:56,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:13:56,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-15 16:13:56,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-15 16:13:56,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 16:13:56,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 16:13:56,822 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 16:13:56,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:56,823 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 16:13:56,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:56,823 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 16:13:56,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:56,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:56,824 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:57,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-15 16:13:57,034 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:57,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:57,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 34 times [2020-10-15 16:13:57,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:57,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529040614] [2020-10-15 16:13:57,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:57,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529040614] [2020-10-15 16:13:57,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42525079] [2020-10-15 16:13:57,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:57,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:57,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:57,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:57,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:57,216 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:57,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:57,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:57,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443668903] [2020-10-15 16:13:57,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:57,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:57,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:57,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:57,243 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 16:13:57,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:57,476 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-15 16:13:57,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:57,476 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:57,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:57,477 INFO L225 Difference]: With dead ends: 166 [2020-10-15 16:13:57,477 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 16:13:57,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:13:57,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 16:13:57,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-15 16:13:57,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:13:57,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-15 16:13:57,480 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-15 16:13:57,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:57,481 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-15 16:13:57,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:57,481 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-15 16:13:57,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:57,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:57,481 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:57,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:57,692 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:57,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:57,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 35 times [2020-10-15 16:13:57,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:57,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350436185] [2020-10-15 16:13:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:57,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350436185] [2020-10-15 16:13:57,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035217313] [2020-10-15 16:13:57,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:57,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:57,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:57,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:57,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:57,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:57,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:57,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483908086] [2020-10-15 16:13:57,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:57,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:57,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:57,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:57,897 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-15 16:13:58,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:58,062 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-15 16:13:58,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:58,063 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:58,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:58,064 INFO L225 Difference]: With dead ends: 163 [2020-10-15 16:13:58,064 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 16:13:58,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:13:58,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 16:13:58,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-15 16:13:58,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-15 16:13:58,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-15 16:13:58,068 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-15 16:13:58,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:58,069 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-15 16:13:58,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:58,069 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-15 16:13:58,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:58,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:58,070 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:58,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-15 16:13:58,279 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:58,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:58,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 36 times [2020-10-15 16:13:58,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:58,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527621950] [2020-10-15 16:13:58,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:58,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:58,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527621950] [2020-10-15 16:13:58,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762351487] [2020-10-15 16:13:58,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:58,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:58,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:58,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:58,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:58,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:58,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:58,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384182614] [2020-10-15 16:13:58,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:58,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:58,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:58,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:58,491 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-15 16:13:58,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:58,771 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-15 16:13:58,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:13:58,772 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:58,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:58,773 INFO L225 Difference]: With dead ends: 170 [2020-10-15 16:13:58,773 INFO L226 Difference]: Without dead ends: 168 [2020-10-15 16:13:58,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:13:58,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-15 16:13:58,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-15 16:13:58,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-15 16:13:58,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-15 16:13:58,777 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-15 16:13:58,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:58,777 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-15 16:13:58,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:58,777 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-15 16:13:58,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:58,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:58,778 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:58,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:58,987 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:58,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:58,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 37 times [2020-10-15 16:13:58,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:58,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560521786] [2020-10-15 16:13:58,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:59,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560521786] [2020-10-15 16:13:59,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110356870] [2020-10-15 16:13:59,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:59,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:59,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:59,143 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:59,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:59,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:59,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041622549] [2020-10-15 16:13:59,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:59,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:59,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:59,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:59,153 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-15 16:13:59,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:59,431 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-15 16:13:59,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:13:59,432 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:59,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:59,433 INFO L225 Difference]: With dead ends: 177 [2020-10-15 16:13:59,433 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 16:13:59,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:13:59,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 16:13:59,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-15 16:13:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-15 16:13:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-15 16:13:59,438 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-15 16:13:59,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:59,438 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-15 16:13:59,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:59,438 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-15 16:13:59,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:59,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:59,439 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:59,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-15 16:13:59,649 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:59,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:59,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 38 times [2020-10-15 16:13:59,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:59,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14828434] [2020-10-15 16:13:59,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:59,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14828434] [2020-10-15 16:13:59,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842215891] [2020-10-15 16:13:59,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:59,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:59,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:59,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:59,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:59,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:59,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:59,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:59,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651478937] [2020-10-15 16:13:59,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:59,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:59,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:59,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:59,827 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-15 16:14:00,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:00,196 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-15 16:14:00,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:14:00,197 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:00,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:00,199 INFO L225 Difference]: With dead ends: 190 [2020-10-15 16:14:00,199 INFO L226 Difference]: Without dead ends: 182 [2020-10-15 16:14:00,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:14:00,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-15 16:14:00,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-15 16:14:00,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:14:00,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-15 16:14:00,203 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-15 16:14:00,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:00,203 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-15 16:14:00,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:00,204 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-15 16:14:00,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:00,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:00,204 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:00,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-15 16:14:00,405 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:00,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:00,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 39 times [2020-10-15 16:14:00,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:00,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903978245] [2020-10-15 16:14:00,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:00,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903978245] [2020-10-15 16:14:00,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987477983] [2020-10-15 16:14:00,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:00,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:14:00,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:00,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:00,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:00,577 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:00,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:00,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:00,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135041816] [2020-10-15 16:14:00,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:00,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:00,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:00,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:00,588 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-10-15 16:14:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:00,915 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-10-15 16:14:00,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:14:00,916 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:00,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:00,917 INFO L225 Difference]: With dead ends: 180 [2020-10-15 16:14:00,918 INFO L226 Difference]: Without dead ends: 175 [2020-10-15 16:14:00,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:14:00,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-15 16:14:00,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-10-15 16:14:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:14:00,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-15 16:14:00,922 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-15 16:14:00,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:00,922 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-15 16:14:00,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-15 16:14:00,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:00,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:00,923 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:01,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-15 16:14:01,133 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:01,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:01,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 40 times [2020-10-15 16:14:01,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:01,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460410058] [2020-10-15 16:14:01,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:01,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:01,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460410058] [2020-10-15 16:14:01,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381021991] [2020-10-15 16:14:01,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:01,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:01,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:01,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:01,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:01,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:01,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:01,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541138261] [2020-10-15 16:14:01,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:01,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:01,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:01,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:01,324 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-15 16:14:01,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:01,466 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-15 16:14:01,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:01,467 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:01,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:01,468 INFO L225 Difference]: With dead ends: 164 [2020-10-15 16:14:01,468 INFO L226 Difference]: Without dead ends: 162 [2020-10-15 16:14:01,468 INFO L677 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 [2020-10-15 16:14:01,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-15 16:14:01,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-15 16:14:01,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:14:01,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-15 16:14:01,473 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-15 16:14:01,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:01,473 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-15 16:14:01,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:01,473 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-15 16:14:01,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:01,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:01,474 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:01,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-15 16:14:01,674 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:01,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:01,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 41 times [2020-10-15 16:14:01,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:01,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86492848] [2020-10-15 16:14:01,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:01,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86492848] [2020-10-15 16:14:01,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109152842] [2020-10-15 16:14:01,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:01,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:01,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:01,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:01,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:01,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:01,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:01,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:01,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639955855] [2020-10-15 16:14:01,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:01,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:01,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:01,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:01,860 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-15 16:14:02,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:02,001 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-15 16:14:02,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:14:02,002 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:02,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:02,003 INFO L225 Difference]: With dead ends: 161 [2020-10-15 16:14:02,003 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 16:14:02,003 INFO L677 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 [2020-10-15 16:14:02,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 16:14:02,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-15 16:14:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:14:02,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-15 16:14:02,006 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-15 16:14:02,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:02,006 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-15 16:14:02,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:02,007 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-15 16:14:02,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:02,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:02,007 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:02,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-15 16:14:02,215 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:02,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:02,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 42 times [2020-10-15 16:14:02,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:02,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734193296] [2020-10-15 16:14:02,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:02,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:02,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734193296] [2020-10-15 16:14:02,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622868695] [2020-10-15 16:14:02,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:02,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:14:02,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:02,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:02,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:02,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:02,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:02,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885249315] [2020-10-15 16:14:02,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:02,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:02,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:02,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:02,414 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-15 16:14:02,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:02,603 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-15 16:14:02,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:02,604 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:02,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:02,605 INFO L225 Difference]: With dead ends: 165 [2020-10-15 16:14:02,605 INFO L226 Difference]: Without dead ends: 163 [2020-10-15 16:14:02,606 INFO L677 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 [2020-10-15 16:14:02,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-15 16:14:02,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-15 16:14:02,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:14:02,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-15 16:14:02,608 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-15 16:14:02,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:02,608 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-15 16:14:02,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:02,608 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-15 16:14:02,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:02,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:02,609 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:02,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-15 16:14:02,810 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:02,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:02,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 43 times [2020-10-15 16:14:02,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:02,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796161903] [2020-10-15 16:14:02,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:02,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:02,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796161903] [2020-10-15 16:14:02,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411173225] [2020-10-15 16:14:02,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:02,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:02,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:03,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:03,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:03,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326651606] [2020-10-15 16:14:03,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:03,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:03,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:03,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:03,006 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-15 16:14:03,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:03,216 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-15 16:14:03,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:03,216 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:03,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:03,218 INFO L225 Difference]: With dead ends: 167 [2020-10-15 16:14:03,218 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 16:14:03,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:14:03,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 16:14:03,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-15 16:14:03,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:14:03,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-15 16:14:03,221 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-15 16:14:03,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:03,221 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-15 16:14:03,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:03,221 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-15 16:14:03,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:03,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:03,222 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:03,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:03,427 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:03,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:03,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 44 times [2020-10-15 16:14:03,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:03,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671939372] [2020-10-15 16:14:03,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:03,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671939372] [2020-10-15 16:14:03,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540568759] [2020-10-15 16:14:03,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:03,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:03,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:03,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:03,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:03,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:03,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:03,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041507515] [2020-10-15 16:14:03,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:03,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:03,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:03,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:03,608 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-15 16:14:03,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:03,862 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-15 16:14:03,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:14:03,862 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:03,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:03,864 INFO L225 Difference]: With dead ends: 168 [2020-10-15 16:14:03,864 INFO L226 Difference]: Without dead ends: 166 [2020-10-15 16:14:03,864 INFO L677 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 [2020-10-15 16:14:03,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-15 16:14:03,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-15 16:14:03,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:14:03,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-15 16:14:03,867 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-15 16:14:03,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:03,868 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-15 16:14:03,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:03,868 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-15 16:14:03,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:03,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:03,868 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:04,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:04,069 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:04,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:04,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 45 times [2020-10-15 16:14:04,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:04,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16749115] [2020-10-15 16:14:04,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:04,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16749115] [2020-10-15 16:14:04,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445440643] [2020-10-15 16:14:04,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:04,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:04,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:04,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:04,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:04,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:04,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:04,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:04,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299599219] [2020-10-15 16:14:04,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:04,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:04,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:04,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:04,241 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-15 16:14:04,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:04,430 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-15 16:14:04,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:04,431 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:04,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:04,432 INFO L225 Difference]: With dead ends: 160 [2020-10-15 16:14:04,432 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 16:14:04,433 INFO L677 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 [2020-10-15 16:14:04,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 16:14:04,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-15 16:14:04,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:14:04,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-15 16:14:04,436 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-15 16:14:04,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:04,437 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-15 16:14:04,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:04,437 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-15 16:14:04,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:04,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:04,438 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:04,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:04,648 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:04,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:04,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 46 times [2020-10-15 16:14:04,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:04,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775666149] [2020-10-15 16:14:04,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:04,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:04,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775666149] [2020-10-15 16:14:04,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521427977] [2020-10-15 16:14:04,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:04,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:04,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:04,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:04,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:04,813 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:04,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:04,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:04,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862052561] [2020-10-15 16:14:04,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:04,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:04,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:04,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:04,853 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-15 16:14:05,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:05,189 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-15 16:14:05,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:14:05,190 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:05,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:05,191 INFO L225 Difference]: With dead ends: 189 [2020-10-15 16:14:05,192 INFO L226 Difference]: Without dead ends: 181 [2020-10-15 16:14:05,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:14:05,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-15 16:14:05,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-15 16:14:05,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:14:05,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-15 16:14:05,195 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-15 16:14:05,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:05,196 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-15 16:14:05,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:05,196 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-15 16:14:05,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:05,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:05,196 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:05,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:05,403 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:05,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:05,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 47 times [2020-10-15 16:14:05,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:05,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849312229] [2020-10-15 16:14:05,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:05,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849312229] [2020-10-15 16:14:05,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920824530] [2020-10-15 16:14:05,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:05,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:05,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:05,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:05,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:05,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:05,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:05,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433404580] [2020-10-15 16:14:05,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:05,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:05,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:05,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:05,577 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-15 16:14:05,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:05,828 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-15 16:14:05,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:14:05,829 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:05,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:05,830 INFO L225 Difference]: With dead ends: 169 [2020-10-15 16:14:05,831 INFO L226 Difference]: Without dead ends: 167 [2020-10-15 16:14:05,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:05,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-15 16:14:05,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-15 16:14:05,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:14:05,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-15 16:14:05,834 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-15 16:14:05,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:05,834 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-15 16:14:05,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:05,834 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-15 16:14:05,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:05,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:05,835 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:06,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-15 16:14:06,036 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:06,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:06,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 48 times [2020-10-15 16:14:06,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:06,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446536788] [2020-10-15 16:14:06,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:06,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446536788] [2020-10-15 16:14:06,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95621963] [2020-10-15 16:14:06,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:06,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:06,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:06,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:06,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:06,214 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:06,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:06,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:06,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560994491] [2020-10-15 16:14:06,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:06,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:06,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:06,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:06,224 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-15 16:14:06,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:06,567 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-15 16:14:06,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:14:06,568 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:06,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:06,569 INFO L225 Difference]: With dead ends: 192 [2020-10-15 16:14:06,569 INFO L226 Difference]: Without dead ends: 184 [2020-10-15 16:14:06,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:14:06,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-15 16:14:06,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-15 16:14:06,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 16:14:06,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-15 16:14:06,573 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-15 16:14:06,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:06,574 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-15 16:14:06,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:06,574 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-15 16:14:06,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:06,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:06,575 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:06,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:06,781 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:06,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:06,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 49 times [2020-10-15 16:14:06,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:06,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619333817] [2020-10-15 16:14:06,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:06,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619333817] [2020-10-15 16:14:06,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400717359] [2020-10-15 16:14:06,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:06,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:06,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:06,964 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:06,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:06,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:06,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198389647] [2020-10-15 16:14:06,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:06,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:06,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:06,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:06,975 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-15 16:14:07,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:07,286 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-15 16:14:07,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:14:07,287 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:07,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:07,288 INFO L225 Difference]: With dead ends: 180 [2020-10-15 16:14:07,288 INFO L226 Difference]: Without dead ends: 175 [2020-10-15 16:14:07,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:14:07,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-15 16:14:07,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-15 16:14:07,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-15 16:14:07,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-15 16:14:07,292 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-15 16:14:07,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:07,292 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-15 16:14:07,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:07,292 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-15 16:14:07,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:07,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:07,293 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:07,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-15 16:14:07,496 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:07,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:07,496 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-10-15 16:14:07,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:07,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804268459] [2020-10-15 16:14:07,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:07,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804268459] [2020-10-15 16:14:07,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347851770] [2020-10-15 16:14:07,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:07,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:07,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:07,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:07,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:07,706 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:07,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:07,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 16:14:07,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624022952] [2020-10-15 16:14:07,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:14:07,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:07,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:14:07,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:14:07,731 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-15 16:14:07,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:07,870 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-15 16:14:07,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:07,870 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-15 16:14:07,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:07,872 INFO L225 Difference]: With dead ends: 164 [2020-10-15 16:14:07,872 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 16:14:07,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:14:07,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 16:14:07,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-15 16:14:07,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 16:14:07,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-15 16:14:07,874 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-15 16:14:07,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:07,874 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-15 16:14:07,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:14:07,874 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-15 16:14:07,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:07,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:07,875 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:08,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:08,076 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:08,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:08,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-10-15 16:14:08,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:08,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559256515] [2020-10-15 16:14:08,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:08,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559256515] [2020-10-15 16:14:08,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99252725] [2020-10-15 16:14:08,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:08,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:14:08,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:08,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:08,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:08,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:08,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:08,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:08,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693718346] [2020-10-15 16:14:08,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:08,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:08,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:08,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:08,340 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-15 16:14:08,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:08,387 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 16:14:08,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:14:08,388 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:08,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:08,389 INFO L225 Difference]: With dead ends: 156 [2020-10-15 16:14:08,389 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 16:14:08,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:08,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 16:14:08,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-15 16:14:08,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 16:14:08,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-15 16:14:08,392 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-15 16:14:08,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:08,393 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-15 16:14:08,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:08,393 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-15 16:14:08,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:08,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:08,393 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:08,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-15 16:14:08,594 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:08,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:08,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-10-15 16:14:08,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:08,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107047745] [2020-10-15 16:14:08,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:08,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107047745] [2020-10-15 16:14:08,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349138533] [2020-10-15 16:14:08,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:08,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:08,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:08,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:08,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:08,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:08,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:08,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490752064] [2020-10-15 16:14:08,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:08,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:08,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:08,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:08,845 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-15 16:14:08,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:08,913 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-15 16:14:08,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:14:08,914 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:08,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:08,915 INFO L225 Difference]: With dead ends: 170 [2020-10-15 16:14:08,915 INFO L226 Difference]: Without dead ends: 167 [2020-10-15 16:14:08,916 INFO L677 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 [2020-10-15 16:14:08,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-15 16:14:08,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-15 16:14:08,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 16:14:08,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-15 16:14:08,920 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-15 16:14:08,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:08,922 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-15 16:14:08,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-15 16:14:08,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:08,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:08,923 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:09,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:09,133 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:09,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:09,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-10-15 16:14:09,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:09,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226014977] [2020-10-15 16:14:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:09,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226014977] [2020-10-15 16:14:09,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566887792] [2020-10-15 16:14:09,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:09,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:09,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:09,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:09,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:09,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:09,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:09,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353036829] [2020-10-15 16:14:09,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:09,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:09,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:09,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:09,407 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-15 16:14:09,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:09,486 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-15 16:14:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:14:09,487 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:09,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:09,488 INFO L225 Difference]: With dead ends: 169 [2020-10-15 16:14:09,489 INFO L226 Difference]: Without dead ends: 166 [2020-10-15 16:14:09,489 INFO L677 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 [2020-10-15 16:14:09,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-15 16:14:09,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-15 16:14:09,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-15 16:14:09,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-15 16:14:09,493 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-15 16:14:09,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:09,493 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-15 16:14:09,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:09,493 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-15 16:14:09,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:09,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:09,494 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:09,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:09,703 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:09,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:09,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-10-15 16:14:09,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:09,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373051081] [2020-10-15 16:14:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:09,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373051081] [2020-10-15 16:14:09,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455760507] [2020-10-15 16:14:09,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:09,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:14:09,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:09,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:09,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:09,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:09,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:09,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921298111] [2020-10-15 16:14:09,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:09,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:09,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:09,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:09,938 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-15 16:14:10,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:10,041 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-15 16:14:10,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:14:10,041 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:10,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:10,043 INFO L225 Difference]: With dead ends: 168 [2020-10-15 16:14:10,043 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 16:14:10,043 INFO L677 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 [2020-10-15 16:14:10,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 16:14:10,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-15 16:14:10,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-15 16:14:10,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-15 16:14:10,046 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-15 16:14:10,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:10,046 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-15 16:14:10,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:10,047 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-15 16:14:10,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:10,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:10,047 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:10,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-15 16:14:10,255 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:10,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:10,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-10-15 16:14:10,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:10,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283141094] [2020-10-15 16:14:10,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:10,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283141094] [2020-10-15 16:14:10,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109908121] [2020-10-15 16:14:10,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:10,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:10,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:10,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:10,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:10,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274927004] [2020-10-15 16:14:10,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:10,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:10,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:10,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:10,477 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-15 16:14:10,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:10,602 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-15 16:14:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:10,603 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:10,604 INFO L225 Difference]: With dead ends: 167 [2020-10-15 16:14:10,604 INFO L226 Difference]: Without dead ends: 164 [2020-10-15 16:14:10,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:14:10,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-15 16:14:10,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-15 16:14:10,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-15 16:14:10,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-15 16:14:10,608 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-15 16:14:10,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:10,608 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-15 16:14:10,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:10,608 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-15 16:14:10,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:10,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:10,609 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:10,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:10,820 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:10,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:10,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-10-15 16:14:10,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:10,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355582609] [2020-10-15 16:14:10,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:10,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:10,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355582609] [2020-10-15 16:14:10,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296222195] [2020-10-15 16:14:10,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:10,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:10,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:10,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:10,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:11,036 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:11,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:11,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:11,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:11,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258845805] [2020-10-15 16:14:11,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:11,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:11,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:11,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:11,053 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-15 16:14:11,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:11,271 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-15 16:14:11,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:11,272 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:11,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:11,274 INFO L225 Difference]: With dead ends: 176 [2020-10-15 16:14:11,274 INFO L226 Difference]: Without dead ends: 170 [2020-10-15 16:14:11,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-15 16:14:11,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-15 16:14:11,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-15 16:14:11,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-15 16:14:11,279 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-15 16:14:11,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:11,280 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-15 16:14:11,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:11,280 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-15 16:14:11,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:11,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:11,281 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:11,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:11,493 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:11,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:11,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 50 times [2020-10-15 16:14:11,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:11,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010564543] [2020-10-15 16:14:11,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:11,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010564543] [2020-10-15 16:14:11,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088851082] [2020-10-15 16:14:11,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:11,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:11,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:11,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:11,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:11,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:11,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:11,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33876325] [2020-10-15 16:14:11,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:11,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:11,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:11,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:11,837 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-15 16:14:11,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:11,905 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-15 16:14:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:14:11,906 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:11,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:11,907 INFO L225 Difference]: With dead ends: 163 [2020-10-15 16:14:11,908 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 16:14:11,908 INFO L677 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 [2020-10-15 16:14:11,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 16:14:11,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-15 16:14:11,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-15 16:14:11,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-15 16:14:11,913 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-15 16:14:11,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:11,913 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-15 16:14:11,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:11,913 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-15 16:14:11,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:11,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:11,914 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:12,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-15 16:14:12,125 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:12,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:12,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 51 times [2020-10-15 16:14:12,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:12,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748646746] [2020-10-15 16:14:12,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:12,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748646746] [2020-10-15 16:14:12,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398528707] [2020-10-15 16:14:12,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:12,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:12,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:12,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:12,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:12,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:12,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:12,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848860743] [2020-10-15 16:14:12,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:12,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:12,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:12,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:12,416 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-15 16:14:12,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:12,555 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-15 16:14:12,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:14:12,556 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:12,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:12,557 INFO L225 Difference]: With dead ends: 172 [2020-10-15 16:14:12,557 INFO L226 Difference]: Without dead ends: 170 [2020-10-15 16:14:12,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:14:12,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-15 16:14:12,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-15 16:14:12,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 16:14:12,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-15 16:14:12,561 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-15 16:14:12,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:12,561 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-15 16:14:12,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:12,561 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-15 16:14:12,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:12,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:12,562 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:12,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:12,772 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:12,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:12,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 52 times [2020-10-15 16:14:12,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:12,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019441440] [2020-10-15 16:14:12,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:12,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019441440] [2020-10-15 16:14:12,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496350963] [2020-10-15 16:14:12,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:12,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:12,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:12,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:12,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:14,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:14,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:14,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959417738] [2020-10-15 16:14:14,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:14,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:14,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:14,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:14,043 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-15 16:14:14,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:14,237 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-15 16:14:14,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:14:14,238 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:14,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:14,239 INFO L225 Difference]: With dead ends: 179 [2020-10-15 16:14:14,239 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 16:14:14,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:14:14,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 16:14:14,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-15 16:14:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-15 16:14:14,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-15 16:14:14,243 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-15 16:14:14,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:14,243 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-15 16:14:14,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:14,243 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-15 16:14:14,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:14,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:14,244 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:14,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-15 16:14:14,444 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:14,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:14,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 53 times [2020-10-15 16:14:14,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:14,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651611835] [2020-10-15 16:14:14,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:14,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651611835] [2020-10-15 16:14:14,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156474516] [2020-10-15 16:14:14,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:14,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:14,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:14,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:14,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:14,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:14,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:14,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256731631] [2020-10-15 16:14:14,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:14,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:14,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:14,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:14,668 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-15 16:14:14,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:14,844 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-15 16:14:14,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:14:14,845 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:14,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:14,846 INFO L225 Difference]: With dead ends: 179 [2020-10-15 16:14:14,847 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 16:14:14,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:14,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 16:14:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-15 16:14:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 16:14:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-15 16:14:14,850 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-15 16:14:14,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:14,850 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-15 16:14:14,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:14,850 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-15 16:14:14,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:14,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:14,850 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:15,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-15 16:14:15,054 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:15,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:15,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 54 times [2020-10-15 16:14:15,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:15,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139259158] [2020-10-15 16:14:15,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:15,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139259158] [2020-10-15 16:14:15,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228439390] [2020-10-15 16:14:15,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:15,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:15,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:15,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:15,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:15,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:15,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:15,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425808794] [2020-10-15 16:14:15,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:15,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:15,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:15,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:15,265 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-15 16:14:15,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:15,472 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-15 16:14:15,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:15,473 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:15,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:15,474 INFO L225 Difference]: With dead ends: 184 [2020-10-15 16:14:15,475 INFO L226 Difference]: Without dead ends: 182 [2020-10-15 16:14:15,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:15,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-15 16:14:15,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-15 16:14:15,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 16:14:15,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-15 16:14:15,479 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-15 16:14:15,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:15,479 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-15 16:14:15,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:15,479 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-15 16:14:15,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:15,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:15,480 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:15,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-15 16:14:15,692 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:15,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:15,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 55 times [2020-10-15 16:14:15,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:15,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407317431] [2020-10-15 16:14:15,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:15,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:15,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407317431] [2020-10-15 16:14:15,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926514818] [2020-10-15 16:14:15,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:15,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:15,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:15,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:15,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:15,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889748404] [2020-10-15 16:14:15,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:15,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:15,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:15,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:15,919 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-15 16:14:16,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:16,140 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-15 16:14:16,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:16,141 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:16,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:16,142 INFO L225 Difference]: With dead ends: 179 [2020-10-15 16:14:16,143 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 16:14:16,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:16,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 16:14:16,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-15 16:14:16,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-15 16:14:16,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-15 16:14:16,146 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-15 16:14:16,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:16,147 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-15 16:14:16,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:16,147 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-15 16:14:16,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:16,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:16,147 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:16,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:16,348 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:16,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:16,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 56 times [2020-10-15 16:14:16,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:16,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426890999] [2020-10-15 16:14:16,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:16,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426890999] [2020-10-15 16:14:16,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922326586] [2020-10-15 16:14:16,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:16,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:16,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:16,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:16,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:16,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:16,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:16,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818911800] [2020-10-15 16:14:16,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:16,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:16,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:16,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:16,586 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-15 16:14:16,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:16,741 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-15 16:14:16,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:14:16,741 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:16,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:16,743 INFO L225 Difference]: With dead ends: 176 [2020-10-15 16:14:16,743 INFO L226 Difference]: Without dead ends: 174 [2020-10-15 16:14:16,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:14:16,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-15 16:14:16,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-15 16:14:16,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:14:16,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-15 16:14:16,746 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-15 16:14:16,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:16,747 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-15 16:14:16,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:16,747 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-15 16:14:16,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:16,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:16,747 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:16,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:16,948 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:16,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:16,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 57 times [2020-10-15 16:14:16,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:16,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908002800] [2020-10-15 16:14:16,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:17,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908002800] [2020-10-15 16:14:17,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126485061] [2020-10-15 16:14:17,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:17,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:14:17,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:17,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:17,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:17,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:17,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:17,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142855848] [2020-10-15 16:14:17,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:17,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:17,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:17,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:17,200 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-15 16:14:17,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:17,399 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-15 16:14:17,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:17,399 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:17,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:17,401 INFO L225 Difference]: With dead ends: 185 [2020-10-15 16:14:17,401 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 16:14:17,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:17,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 16:14:17,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-15 16:14:17,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:14:17,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-15 16:14:17,405 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-15 16:14:17,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:17,405 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-15 16:14:17,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:17,405 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-15 16:14:17,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:17,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:17,405 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:17,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:17,606 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:17,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:17,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 58 times [2020-10-15 16:14:17,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:17,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342592588] [2020-10-15 16:14:17,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:17,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342592588] [2020-10-15 16:14:17,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289504870] [2020-10-15 16:14:17,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:17,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:17,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:17,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:17,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:17,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:17,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:17,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404758086] [2020-10-15 16:14:17,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:17,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:17,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:17,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:17,828 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-15 16:14:18,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:18,023 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-15 16:14:18,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:18,024 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:18,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:18,025 INFO L225 Difference]: With dead ends: 185 [2020-10-15 16:14:18,025 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 16:14:18,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:18,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 16:14:18,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-15 16:14:18,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-15 16:14:18,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-15 16:14:18,029 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-15 16:14:18,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:18,029 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-15 16:14:18,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-15 16:14:18,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:18,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:18,030 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:18,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:18,230 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:18,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:18,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 59 times [2020-10-15 16:14:18,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:18,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332553946] [2020-10-15 16:14:18,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:18,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332553946] [2020-10-15 16:14:18,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416790327] [2020-10-15 16:14:18,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:18,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:18,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:18,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:18,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:18,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:18,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:18,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510725422] [2020-10-15 16:14:18,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:18,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:18,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:18,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:18,493 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-15 16:14:18,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:18,562 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-15 16:14:18,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:14:18,563 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:18,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:18,564 INFO L225 Difference]: With dead ends: 182 [2020-10-15 16:14:18,564 INFO L226 Difference]: Without dead ends: 180 [2020-10-15 16:14:18,564 INFO L677 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 [2020-10-15 16:14:18,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-15 16:14:18,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-15 16:14:18,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:14:18,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-15 16:14:18,570 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-15 16:14:18,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:18,570 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-15 16:14:18,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:18,571 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-15 16:14:18,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:18,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:18,572 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:18,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-15 16:14:18,772 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:18,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:18,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 60 times [2020-10-15 16:14:18,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:18,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490248701] [2020-10-15 16:14:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:18,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490248701] [2020-10-15 16:14:18,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321559576] [2020-10-15 16:14:18,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:18,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:18,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:18,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:18,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:19,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:19,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:19,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:19,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560355558] [2020-10-15 16:14:19,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:19,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:19,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:19,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:19,028 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-15 16:14:19,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:19,206 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-15 16:14:19,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:14:19,207 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:19,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:19,208 INFO L225 Difference]: With dead ends: 185 [2020-10-15 16:14:19,208 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 16:14:19,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:14:19,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 16:14:19,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-15 16:14:19,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:19,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-15 16:14:19,212 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-15 16:14:19,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:19,212 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-15 16:14:19,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:19,213 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-15 16:14:19,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:19,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:19,213 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:19,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:19,414 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:19,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:19,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 61 times [2020-10-15 16:14:19,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:19,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309734324] [2020-10-15 16:14:19,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:19,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309734324] [2020-10-15 16:14:19,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051749544] [2020-10-15 16:14:19,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:19,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:19,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:20,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:20,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:20,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469732598] [2020-10-15 16:14:20,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:20,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:20,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:20,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:20,180 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:20,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:20,405 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-15 16:14:20,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:14:20,406 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:20,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:20,407 INFO L225 Difference]: With dead ends: 191 [2020-10-15 16:14:20,408 INFO L226 Difference]: Without dead ends: 189 [2020-10-15 16:14:20,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:20,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-15 16:14:20,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-15 16:14:20,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:14:20,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-15 16:14:20,412 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-15 16:14:20,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:20,412 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-15 16:14:20,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:20,412 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-15 16:14:20,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:20,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:20,413 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:20,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:20,621 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:20,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:20,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 62 times [2020-10-15 16:14:20,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:20,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284522702] [2020-10-15 16:14:20,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:20,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:20,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284522702] [2020-10-15 16:14:20,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98390147] [2020-10-15 16:14:20,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:20,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:20,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:20,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:20,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:20,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:20,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:20,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905325207] [2020-10-15 16:14:20,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:20,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:20,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:20,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:20,852 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-15 16:14:21,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:21,082 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-15 16:14:21,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:21,083 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:21,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:21,085 INFO L225 Difference]: With dead ends: 187 [2020-10-15 16:14:21,085 INFO L226 Difference]: Without dead ends: 185 [2020-10-15 16:14:21,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:21,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-15 16:14:21,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-15 16:14:21,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:21,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-15 16:14:21,089 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-15 16:14:21,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:21,089 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-15 16:14:21,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:21,089 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-15 16:14:21,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:21,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:21,090 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:21,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-15 16:14:21,291 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:21,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:21,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 63 times [2020-10-15 16:14:21,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:21,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119691811] [2020-10-15 16:14:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:21,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119691811] [2020-10-15 16:14:21,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385938934] [2020-10-15 16:14:21,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:21,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:21,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:21,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:21,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:21,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:21,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:21,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439191716] [2020-10-15 16:14:21,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:21,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:21,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:21,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:21,536 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:21,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:21,780 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-15 16:14:21,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:21,781 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:21,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:21,782 INFO L225 Difference]: With dead ends: 198 [2020-10-15 16:14:21,782 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 16:14:21,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:21,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 16:14:21,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-15 16:14:21,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:21,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-15 16:14:21,786 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-15 16:14:21,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:21,787 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-15 16:14:21,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:21,787 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-15 16:14:21,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:21,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:21,788 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:21,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:21,997 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:21,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:21,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 64 times [2020-10-15 16:14:21,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:21,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539768895] [2020-10-15 16:14:21,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:22,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539768895] [2020-10-15 16:14:22,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634539770] [2020-10-15 16:14:22,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:22,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:22,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:22,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:22,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:22,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:22,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:22,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573857246] [2020-10-15 16:14:22,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:22,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:22,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:22,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:22,252 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-15 16:14:22,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:22,516 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-15 16:14:22,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:22,516 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:22,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:22,518 INFO L225 Difference]: With dead ends: 189 [2020-10-15 16:14:22,518 INFO L226 Difference]: Without dead ends: 187 [2020-10-15 16:14:22,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:22,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-15 16:14:22,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-15 16:14:22,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:14:22,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-15 16:14:22,521 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-15 16:14:22,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:22,521 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-15 16:14:22,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:22,521 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-15 16:14:22,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:22,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:22,522 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:22,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-15 16:14:22,726 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:22,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:22,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 65 times [2020-10-15 16:14:22,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:22,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520522994] [2020-10-15 16:14:22,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:22,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520522994] [2020-10-15 16:14:22,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411420261] [2020-10-15 16:14:22,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:22,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:22,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:22,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:22,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:22,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:22,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:22,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253992581] [2020-10-15 16:14:22,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:22,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:22,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:22,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:22,990 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-15 16:14:23,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:23,085 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-15 16:14:23,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:14:23,086 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:23,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:23,088 INFO L225 Difference]: With dead ends: 178 [2020-10-15 16:14:23,088 INFO L226 Difference]: Without dead ends: 176 [2020-10-15 16:14:23,088 INFO L677 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 [2020-10-15 16:14:23,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-15 16:14:23,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-15 16:14:23,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:23,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-15 16:14:23,091 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-15 16:14:23,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:23,092 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-15 16:14:23,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:23,092 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-15 16:14:23,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:23,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:23,092 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:23,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:23,293 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:23,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:23,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 66 times [2020-10-15 16:14:23,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:23,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311022082] [2020-10-15 16:14:23,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:23,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:23,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311022082] [2020-10-15 16:14:23,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988184592] [2020-10-15 16:14:23,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:23,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:23,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:23,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:23,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:23,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:23,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:23,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32220700] [2020-10-15 16:14:23,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:23,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:23,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:23,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:23,547 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-15 16:14:23,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:23,720 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-15 16:14:23,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:23,721 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:23,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:23,722 INFO L225 Difference]: With dead ends: 193 [2020-10-15 16:14:23,723 INFO L226 Difference]: Without dead ends: 191 [2020-10-15 16:14:23,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:23,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-15 16:14:23,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-15 16:14:23,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:14:23,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-15 16:14:23,726 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-15 16:14:23,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:23,726 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-15 16:14:23,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:23,726 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-15 16:14:23,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:23,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:23,726 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:23,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-15 16:14:23,927 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:23,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:23,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 67 times [2020-10-15 16:14:23,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:23,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523486244] [2020-10-15 16:14:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:24,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523486244] [2020-10-15 16:14:24,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313974690] [2020-10-15 16:14:24,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:24,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:24,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:24,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:24,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:24,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372801823] [2020-10-15 16:14:24,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:24,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:24,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:24,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:24,193 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-15 16:14:24,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:24,435 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-15 16:14:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:24,435 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:24,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:24,437 INFO L225 Difference]: With dead ends: 195 [2020-10-15 16:14:24,437 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 16:14:24,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:14:24,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 16:14:24,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-15 16:14:24,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:14:24,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-15 16:14:24,440 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-15 16:14:24,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:24,441 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-15 16:14:24,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:24,441 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-15 16:14:24,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:24,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:24,441 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:24,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:24,652 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:24,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:24,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 68 times [2020-10-15 16:14:24,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:24,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756697461] [2020-10-15 16:14:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:24,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756697461] [2020-10-15 16:14:24,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339519656] [2020-10-15 16:14:24,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:24,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:24,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:24,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:24,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:24,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:24,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:24,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586865363] [2020-10-15 16:14:24,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:24,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:24,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:24,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:24,898 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-15 16:14:25,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:25,009 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-15 16:14:25,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:14:25,010 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:25,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:25,012 INFO L225 Difference]: With dead ends: 174 [2020-10-15 16:14:25,012 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 16:14:25,012 INFO L677 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 [2020-10-15 16:14:25,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 16:14:25,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-15 16:14:25,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:25,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-15 16:14:25,015 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-15 16:14:25,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:25,015 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-15 16:14:25,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:25,015 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-15 16:14:25,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:25,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:25,016 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:25,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-15 16:14:25,216 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:25,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:25,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 69 times [2020-10-15 16:14:25,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:25,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084288106] [2020-10-15 16:14:25,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:25,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084288106] [2020-10-15 16:14:25,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617727062] [2020-10-15 16:14:25,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:25,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:25,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:25,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:25,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:25,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:25,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:25,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992162111] [2020-10-15 16:14:25,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:25,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:25,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:25,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:25,460 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-15 16:14:25,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:25,699 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-15 16:14:25,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:25,700 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:25,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:25,701 INFO L225 Difference]: With dead ends: 189 [2020-10-15 16:14:25,702 INFO L226 Difference]: Without dead ends: 187 [2020-10-15 16:14:25,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:14:25,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-15 16:14:25,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-15 16:14:25,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:14:25,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-15 16:14:25,705 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-15 16:14:25,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:25,705 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-15 16:14:25,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:25,705 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-15 16:14:25,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:25,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:25,706 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:25,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:25,907 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:25,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:25,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 70 times [2020-10-15 16:14:25,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:25,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516316022] [2020-10-15 16:14:25,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:25,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516316022] [2020-10-15 16:14:25,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119776457] [2020-10-15 16:14:25,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:26,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:26,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:26,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:26,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:26,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:26,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:26,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511135046] [2020-10-15 16:14:26,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:26,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:26,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:26,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:26,145 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-15 16:14:26,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:26,280 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-15 16:14:26,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:26,281 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:26,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:26,283 INFO L225 Difference]: With dead ends: 175 [2020-10-15 16:14:26,283 INFO L226 Difference]: Without dead ends: 173 [2020-10-15 16:14:26,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:14:26,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-15 16:14:26,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-15 16:14:26,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:26,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 16:14:26,286 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 16:14:26,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:26,286 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 16:14:26,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:26,286 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 16:14:26,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:26,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:26,287 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:26,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:26,489 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:26,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:26,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 71 times [2020-10-15 16:14:26,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:26,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943001598] [2020-10-15 16:14:26,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:26,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943001598] [2020-10-15 16:14:26,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659422850] [2020-10-15 16:14:26,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:26,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:26,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:26,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:26,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:26,716 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:26,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:26,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:26,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045334309] [2020-10-15 16:14:26,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:26,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:26,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:26,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:26,750 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:27,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:27,079 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-15 16:14:27,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:27,080 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:27,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:27,081 INFO L225 Difference]: With dead ends: 195 [2020-10-15 16:14:27,082 INFO L226 Difference]: Without dead ends: 190 [2020-10-15 16:14:27,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:14:27,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-15 16:14:27,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-15 16:14:27,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:27,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-15 16:14:27,085 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-15 16:14:27,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:27,085 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-15 16:14:27,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:27,086 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-15 16:14:27,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:27,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:27,086 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:27,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:27,287 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:27,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:27,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 72 times [2020-10-15 16:14:27,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:27,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015261422] [2020-10-15 16:14:27,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:27,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015261422] [2020-10-15 16:14:27,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510371636] [2020-10-15 16:14:27,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:27,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:27,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:27,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:27,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:27,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:27,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:27,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712684993] [2020-10-15 16:14:27,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:27,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:27,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:27,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:27,536 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-15 16:14:27,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:27,793 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-15 16:14:27,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:14:27,793 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:27,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:27,794 INFO L225 Difference]: With dead ends: 187 [2020-10-15 16:14:27,795 INFO L226 Difference]: Without dead ends: 185 [2020-10-15 16:14:27,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:27,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-15 16:14:27,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-15 16:14:27,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:27,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 16:14:27,798 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 16:14:27,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:27,798 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 16:14:27,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:27,798 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 16:14:27,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:27,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:27,799 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:27,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:28,000 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:28,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:28,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 73 times [2020-10-15 16:14:28,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:28,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956575309] [2020-10-15 16:14:28,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:28,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:28,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956575309] [2020-10-15 16:14:28,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065842123] [2020-10-15 16:14:28,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:28,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:28,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:28,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:28,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:28,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:28,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72972355] [2020-10-15 16:14:28,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:28,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:28,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:28,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:28,254 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:28,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:28,698 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-15 16:14:28,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:14:28,698 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:28,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:28,700 INFO L225 Difference]: With dead ends: 212 [2020-10-15 16:14:28,700 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 16:14:28,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:14:28,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 16:14:28,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-15 16:14:28,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:28,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 16:14:28,704 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 16:14:28,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:28,704 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 16:14:28,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:28,704 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 16:14:28,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:28,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:28,705 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:28,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-15 16:14:28,906 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:28,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:28,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 74 times [2020-10-15 16:14:28,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:28,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501559396] [2020-10-15 16:14:28,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:28,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501559396] [2020-10-15 16:14:28,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113563570] [2020-10-15 16:14:28,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:29,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:29,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:29,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:29,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:29,136 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:29,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:29,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:29,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654526769] [2020-10-15 16:14:29,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:29,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:29,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:29,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:29,158 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:29,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:29,498 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-15 16:14:29,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:29,499 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:29,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:29,501 INFO L225 Difference]: With dead ends: 202 [2020-10-15 16:14:29,501 INFO L226 Difference]: Without dead ends: 197 [2020-10-15 16:14:29,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:14:29,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-15 16:14:29,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-15 16:14:29,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:14:29,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-15 16:14:29,506 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-15 16:14:29,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:29,506 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-15 16:14:29,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:29,506 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-15 16:14:29,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:29,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:29,507 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:29,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:29,712 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:29,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:29,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 75 times [2020-10-15 16:14:29,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:29,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962659555] [2020-10-15 16:14:29,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:29,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962659555] [2020-10-15 16:14:29,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460181107] [2020-10-15 16:14:29,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:29,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:29,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:29,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:29,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:30,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:30,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:30,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411491671] [2020-10-15 16:14:30,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:30,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:30,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:30,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:30,480 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-15 16:14:30,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:30,774 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-15 16:14:30,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:30,775 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:30,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:30,776 INFO L225 Difference]: With dead ends: 198 [2020-10-15 16:14:30,776 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 16:14:30,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:30,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 16:14:30,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-15 16:14:30,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:30,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-15 16:14:30,780 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-15 16:14:30,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:30,780 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-15 16:14:30,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:30,780 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-15 16:14:30,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:30,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:30,781 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:30,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-15 16:14:30,989 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:30,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:30,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 76 times [2020-10-15 16:14:30,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:30,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956864300] [2020-10-15 16:14:30,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:31,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956864300] [2020-10-15 16:14:31,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817479704] [2020-10-15 16:14:31,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:31,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:31,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:31,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:31,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:31,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:31,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:31,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:31,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677699426] [2020-10-15 16:14:31,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:31,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:31,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:31,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:31,277 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-15 16:14:31,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:31,681 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-15 16:14:31,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:14:31,682 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:31,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:31,684 INFO L225 Difference]: With dead ends: 209 [2020-10-15 16:14:31,684 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 16:14:31,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:14:31,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 16:14:31,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-15 16:14:31,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:31,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 16:14:31,688 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 16:14:31,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:31,688 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 16:14:31,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:31,688 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 16:14:31,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:31,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:31,688 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:31,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-15 16:14:31,889 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:31,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:31,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 77 times [2020-10-15 16:14:31,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:31,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095453102] [2020-10-15 16:14:31,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:31,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:31,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095453102] [2020-10-15 16:14:31,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193860055] [2020-10-15 16:14:31,956 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:32,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:32,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:32,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:32,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:32,141 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:32,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:32,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:32,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322011027] [2020-10-15 16:14:32,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:32,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:32,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:32,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:32,178 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:32,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:32,719 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-15 16:14:32,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:14:32,720 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:32,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:32,721 INFO L225 Difference]: With dead ends: 217 [2020-10-15 16:14:32,721 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 16:14:32,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:14:32,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 16:14:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-15 16:14:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 16:14:32,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-15 16:14:32,726 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-15 16:14:32,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:32,726 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-15 16:14:32,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:32,726 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-15 16:14:32,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:32,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:32,727 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:32,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-15 16:14:32,934 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:32,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:32,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 78 times [2020-10-15 16:14:32,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:32,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223388901] [2020-10-15 16:14:32,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:33,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223388901] [2020-10-15 16:14:33,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684804451] [2020-10-15 16:14:33,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:33,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:33,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:33,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:33,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:35,238 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:35,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:35,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:35,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354248664] [2020-10-15 16:14:35,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:35,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:35,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:35,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-15 16:14:35,275 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-15 16:14:39,582 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 16:14:43,804 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-15 16:14:44,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:44,220 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-15 16:14:44,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:14:44,220 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:44,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:44,221 INFO L225 Difference]: With dead ends: 236 [2020-10-15 16:14:44,221 INFO L226 Difference]: Without dead ends: 228 [2020-10-15 16:14:44,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-10-15 16:14:44,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-15 16:14:44,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-15 16:14:44,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:14:44,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-15 16:14:44,224 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-15 16:14:44,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:44,224 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-15 16:14:44,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:44,224 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-15 16:14:44,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:44,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:44,225 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:44,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-15 16:14:44,425 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:44,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:44,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 79 times [2020-10-15 16:14:44,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:44,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753614377] [2020-10-15 16:14:44,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:44,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753614377] [2020-10-15 16:14:44,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579762742] [2020-10-15 16:14:44,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:44,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:44,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:44,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:44,678 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:45,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:45,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 16:14:45,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611448070] [2020-10-15 16:14:45,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:14:45,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:45,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:14:45,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=169, Unknown=1, NotChecked=0, Total=240 [2020-10-15 16:14:45,771 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 16 states. [2020-10-15 16:14:47,509 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 44 [2020-10-15 16:14:52,474 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 51 [2020-10-15 16:14:55,546 WARN L193 SmtUtils]: Spent 3.00 s on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-15 16:15:29,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:29,352 INFO L93 Difference]: Finished difference Result 236 states and 556 transitions. [2020-10-15 16:15:29,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:15:29,353 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-15 16:15:29,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:29,354 INFO L225 Difference]: With dead ends: 236 [2020-10-15 16:15:29,354 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 16:15:29,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=311, Invalid=734, Unknown=11, NotChecked=0, Total=1056 [2020-10-15 16:15:29,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 16:15:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 140. [2020-10-15 16:15:29,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:15:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-15 16:15:29,358 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-15 16:15:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:29,359 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-15 16:15:29,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:15:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-15 16:15:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:29,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:29,359 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:29,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:29,568 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:29,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:29,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 80 times [2020-10-15 16:15:29,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:29,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465334394] [2020-10-15 16:15:29,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:29,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465334394] [2020-10-15 16:15:29,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80835788] [2020-10-15 16:15:29,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:29,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:15:29,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:29,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:29,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:29,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:29,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:29,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929537930] [2020-10-15 16:15:29,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:29,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:29,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:29,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:29,838 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-15 16:15:30,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:30,124 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-15 16:15:30,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:15:30,125 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:30,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:30,126 INFO L225 Difference]: With dead ends: 197 [2020-10-15 16:15:30,126 INFO L226 Difference]: Without dead ends: 195 [2020-10-15 16:15:30,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:15:30,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-15 16:15:30,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-15 16:15:30,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:15:30,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-15 16:15:30,130 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-15 16:15:30,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:30,130 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-15 16:15:30,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:30,130 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-15 16:15:30,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:30,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:30,131 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:30,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:30,332 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:30,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:30,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 81 times [2020-10-15 16:15:30,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:30,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722153216] [2020-10-15 16:15:30,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:30,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:30,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722153216] [2020-10-15 16:15:30,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858200109] [2020-10-15 16:15:30,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:30,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:15:30,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:30,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:30,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:30,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:30,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:30,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11598898] [2020-10-15 16:15:30,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:30,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:30,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:30,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:30,570 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-15 16:15:30,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:30,861 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-15 16:15:30,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:15:30,862 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:30,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:30,862 INFO L225 Difference]: With dead ends: 202 [2020-10-15 16:15:30,863 INFO L226 Difference]: Without dead ends: 200 [2020-10-15 16:15:30,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:15:30,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-15 16:15:30,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-15 16:15:30,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:15:30,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-15 16:15:30,865 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-15 16:15:30,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:30,866 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-15 16:15:30,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:30,866 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-15 16:15:30,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:30,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:30,866 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:31,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-15 16:15:31,067 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:31,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:31,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 82 times [2020-10-15 16:15:31,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:31,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419325471] [2020-10-15 16:15:31,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:31,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419325471] [2020-10-15 16:15:31,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520766641] [2020-10-15 16:15:31,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:31,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:15:31,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:31,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:31,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:31,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:31,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:31,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704729137] [2020-10-15 16:15:31,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:31,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:31,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:31,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:31,338 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-15 16:15:31,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:31,645 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-15 16:15:31,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:15:31,646 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:31,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:31,647 INFO L225 Difference]: With dead ends: 197 [2020-10-15 16:15:31,647 INFO L226 Difference]: Without dead ends: 195 [2020-10-15 16:15:31,647 INFO L677 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 [2020-10-15 16:15:31,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-15 16:15:31,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-15 16:15:31,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:15:31,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-15 16:15:31,651 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-15 16:15:31,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:31,651 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-15 16:15:31,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:31,652 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-15 16:15:31,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:31,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:31,652 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:31,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-15 16:15:31,853 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:31,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:31,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 83 times [2020-10-15 16:15:31,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:31,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242768126] [2020-10-15 16:15:31,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:31,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242768126] [2020-10-15 16:15:31,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536607501] [2020-10-15 16:15:31,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:32,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:15:32,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:32,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:32,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:32,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:32,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:32,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599007890] [2020-10-15 16:15:32,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:32,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:32,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:32,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:32,201 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-15 16:15:32,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:32,762 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-15 16:15:32,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:15:32,763 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:32,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:32,764 INFO L225 Difference]: With dead ends: 214 [2020-10-15 16:15:32,764 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 16:15:32,765 INFO L677 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 [2020-10-15 16:15:32,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 16:15:32,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-15 16:15:32,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:15:32,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-15 16:15:32,768 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-15 16:15:32,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:32,768 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-15 16:15:32,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:32,768 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-15 16:15:32,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:32,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:32,769 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:32,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-15 16:15:32,977 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:32,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:32,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 84 times [2020-10-15 16:15:32,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:32,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183001848] [2020-10-15 16:15:32,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:33,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:33,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183001848] [2020-10-15 16:15:33,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997928730] [2020-10-15 16:15:33,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:33,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:15:33,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:33,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:33,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:33,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:33,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:33,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167335518] [2020-10-15 16:15:33,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:33,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:33,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:33,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:33,223 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-15 16:15:33,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:33,655 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-15 16:15:33,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:15:33,655 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:33,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:33,656 INFO L225 Difference]: With dead ends: 217 [2020-10-15 16:15:33,656 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 16:15:33,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:15:33,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 16:15:33,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-15 16:15:33,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:15:33,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-15 16:15:33,660 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-15 16:15:33,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:33,660 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-15 16:15:33,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:33,660 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-15 16:15:33,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:33,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:33,661 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:33,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:33,862 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:33,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:33,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 85 times [2020-10-15 16:15:33,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:33,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169048451] [2020-10-15 16:15:33,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:33,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169048451] [2020-10-15 16:15:33,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317617402] [2020-10-15 16:15:33,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:33,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:33,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:34,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:34,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:34,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12708319] [2020-10-15 16:15:34,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:34,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:34,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:34,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:34,140 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-15 16:15:34,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:34,566 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-15 16:15:34,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:15:34,567 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:34,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:34,568 INFO L225 Difference]: With dead ends: 211 [2020-10-15 16:15:34,568 INFO L226 Difference]: Without dead ends: 209 [2020-10-15 16:15:34,568 INFO L677 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 [2020-10-15 16:15:34,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-15 16:15:34,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-15 16:15:34,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 16:15:34,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 16:15:34,572 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 16:15:34,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:34,572 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 16:15:34,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:34,572 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 16:15:34,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:34,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:34,573 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:34,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:34,778 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:34,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:34,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 86 times [2020-10-15 16:15:34,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:34,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016814054] [2020-10-15 16:15:34,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:34,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016814054] [2020-10-15 16:15:34,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735364409] [2020-10-15 16:15:34,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:34,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:15:34,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:34,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:34,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:35,013 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:15:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:35,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:35,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:35,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269757047] [2020-10-15 16:15:35,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:35,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:35,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:35,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:35,024 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 16:15:35,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:35,537 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-15 16:15:35,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:15:35,538 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:35,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:35,539 INFO L225 Difference]: With dead ends: 211 [2020-10-15 16:15:35,539 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 16:15:35,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:15:35,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 16:15:35,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-15 16:15:35,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 16:15:35,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 16:15:35,542 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 16:15:35,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:35,542 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 16:15:35,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:35,542 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 16:15:35,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:35,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:35,543 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:35,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-15 16:15:35,753 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:35,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:35,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 87 times [2020-10-15 16:15:35,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:35,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547575602] [2020-10-15 16:15:35,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:35,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547575602] [2020-10-15 16:15:35,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724307266] [2020-10-15 16:15:35,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:35,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:15:35,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:35,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:35,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:35,991 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:15:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:36,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:36,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:36,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565775457] [2020-10-15 16:15:36,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:36,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:36,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:36,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:36,035 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 16:15:36,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:36,669 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-15 16:15:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:15:36,670 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:36,670 INFO L225 Difference]: With dead ends: 227 [2020-10-15 16:15:36,670 INFO L226 Difference]: Without dead ends: 222 [2020-10-15 16:15:36,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:15:36,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-15 16:15:36,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-15 16:15:36,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:15:36,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-15 16:15:36,673 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-15 16:15:36,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:36,673 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-15 16:15:36,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:36,673 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-15 16:15:36,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:36,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:36,674 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:36,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-15 16:15:36,875 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:36,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:36,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 88 times [2020-10-15 16:15:36,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:36,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139887094] [2020-10-15 16:15:36,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:36,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139887094] [2020-10-15 16:15:36,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622951804] [2020-10-15 16:15:36,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:36,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:15:36,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:36,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:36,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:37,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:37,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:37,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:37,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374578657] [2020-10-15 16:15:37,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:37,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:37,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:37,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:37,127 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-15 16:15:37,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:37,629 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-15 16:15:37,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:15:37,630 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:37,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:37,631 INFO L225 Difference]: With dead ends: 221 [2020-10-15 16:15:37,631 INFO L226 Difference]: Without dead ends: 219 [2020-10-15 16:15:37,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:15:37,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-15 16:15:37,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-15 16:15:37,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 16:15:37,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 16:15:37,635 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 16:15:37,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:37,635 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 16:15:37,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:37,635 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 16:15:37,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:37,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:37,635 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:37,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:37,843 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:37,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:37,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 89 times [2020-10-15 16:15:37,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:37,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843039545] [2020-10-15 16:15:37,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:37,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:37,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:37,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843039545] [2020-10-15 16:15:37,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553601493] [2020-10-15 16:15:37,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:37,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:15:37,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:37,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:37,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:38,069 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:15:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:38,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:38,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:38,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533750017] [2020-10-15 16:15:38,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:38,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:38,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:38,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:38,081 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 16:15:38,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:38,720 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-15 16:15:38,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:15:38,720 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:38,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:38,721 INFO L225 Difference]: With dead ends: 240 [2020-10-15 16:15:38,721 INFO L226 Difference]: Without dead ends: 232 [2020-10-15 16:15:38,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:15:38,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-15 16:15:38,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-15 16:15:38,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 16:15:38,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-15 16:15:38,725 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-15 16:15:38,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:38,725 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-15 16:15:38,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:38,725 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-15 16:15:38,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:38,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:38,725 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:38,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-15 16:15:38,926 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:38,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:38,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 90 times [2020-10-15 16:15:38,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:38,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138468420] [2020-10-15 16:15:38,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:39,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138468420] [2020-10-15 16:15:39,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526594447] [2020-10-15 16:15:39,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:39,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:15:39,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:39,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:39,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:39,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:15:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:39,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:39,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:39,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499940020] [2020-10-15 16:15:39,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:39,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:39,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:39,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:39,214 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-15 16:15:39,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:39,880 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-15 16:15:39,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:15:39,880 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:39,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:39,881 INFO L225 Difference]: With dead ends: 238 [2020-10-15 16:15:39,881 INFO L226 Difference]: Without dead ends: 230 [2020-10-15 16:15:39,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:15:39,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-15 16:15:39,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-15 16:15:39,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:15:39,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-15 16:15:39,884 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-15 16:15:39,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:39,884 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-15 16:15:39,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:39,884 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-15 16:15:39,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:39,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:39,885 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:40,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:40,085 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:40,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:40,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 91 times [2020-10-15 16:15:40,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:40,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257268204] [2020-10-15 16:15:40,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:40,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257268204] [2020-10-15 16:15:40,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400161442] [2020-10-15 16:15:40,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:40,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:40,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:40,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:40,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:40,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944873479] [2020-10-15 16:15:40,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:40,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:40,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:40,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:40,347 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-15 16:15:40,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:40,622 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-15 16:15:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:15:40,623 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:40,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:40,624 INFO L225 Difference]: With dead ends: 195 [2020-10-15 16:15:40,624 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 16:15:40,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:15:40,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 16:15:40,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-15 16:15:40,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:15:40,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-15 16:15:40,628 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-15 16:15:40,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:40,628 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-15 16:15:40,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-15 16:15:40,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:40,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:40,628 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:40,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-15 16:15:40,829 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:40,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:40,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 92 times [2020-10-15 16:15:40,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:40,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527781698] [2020-10-15 16:15:40,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:40,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:40,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527781698] [2020-10-15 16:15:40,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406749804] [2020-10-15 16:15:40,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:40,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:15:40,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:40,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:40,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:41,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:41,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:41,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963295401] [2020-10-15 16:15:41,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:41,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:41,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:41,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:41,095 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-15 16:15:41,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:41,594 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-15 16:15:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:15:41,595 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:41,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:41,596 INFO L225 Difference]: With dead ends: 206 [2020-10-15 16:15:41,596 INFO L226 Difference]: Without dead ends: 204 [2020-10-15 16:15:41,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:15:41,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-15 16:15:41,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-15 16:15:41,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:15:41,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-15 16:15:41,599 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-15 16:15:41,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:41,599 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-15 16:15:41,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:41,599 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-15 16:15:41,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:41,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:41,600 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:41,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:41,801 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:41,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:41,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 93 times [2020-10-15 16:15:41,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:41,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619555311] [2020-10-15 16:15:41,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:41,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619555311] [2020-10-15 16:15:41,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154050569] [2020-10-15 16:15:41,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:41,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:15:41,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:41,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:41,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:42,064 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:15:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:44,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:44,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 16:15:44,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542436038] [2020-10-15 16:15:44,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:15:44,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:44,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:15:44,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-15 16:15:44,179 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-10-15 16:15:46,078 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-15 16:16:06,771 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-15 16:16:43,443 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-15 16:17:00,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:00,806 INFO L93 Difference]: Finished difference Result 260 states and 609 transitions. [2020-10-15 16:17:00,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:17:00,807 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-15 16:17:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:00,808 INFO L225 Difference]: With dead ends: 260 [2020-10-15 16:17:00,808 INFO L226 Difference]: Without dead ends: 255 [2020-10-15 16:17:00,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-10-15 16:17:00,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-15 16:17:00,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 139. [2020-10-15 16:17:00,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:17:00,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-15 16:17:00,811 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-15 16:17:00,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:00,811 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-15 16:17:00,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:17:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-15 16:17:00,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:00,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:00,812 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:01,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-15 16:17:01,013 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:01,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:01,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 94 times [2020-10-15 16:17:01,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:01,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890389608] [2020-10-15 16:17:01,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:01,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890389608] [2020-10-15 16:17:01,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014670156] [2020-10-15 16:17:01,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:01,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:01,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:01,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:01,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:01,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:01,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:01,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815797524] [2020-10-15 16:17:01,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:01,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:01,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:01,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:01,279 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-15 16:17:01,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:01,506 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-15 16:17:01,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:17:01,507 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:01,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:01,508 INFO L225 Difference]: With dead ends: 194 [2020-10-15 16:17:01,508 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 16:17:01,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:17:01,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 16:17:01,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-15 16:17:01,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:17:01,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-15 16:17:01,511 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-15 16:17:01,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:01,511 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-15 16:17:01,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:01,511 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-15 16:17:01,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:01,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:01,512 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:01,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:01,713 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:01,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:01,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 95 times [2020-10-15 16:17:01,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:01,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853614873] [2020-10-15 16:17:01,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:01,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853614873] [2020-10-15 16:17:01,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943041100] [2020-10-15 16:17:01,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:01,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:17:01,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:01,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:01,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:01,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:01,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:01,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908766618] [2020-10-15 16:17:01,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:01,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:01,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:01,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:01,976 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-15 16:17:02,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:02,297 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-15 16:17:02,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:17:02,298 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:02,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:02,299 INFO L225 Difference]: With dead ends: 205 [2020-10-15 16:17:02,299 INFO L226 Difference]: Without dead ends: 203 [2020-10-15 16:17:02,299 INFO L677 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 [2020-10-15 16:17:02,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-15 16:17:02,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-15 16:17:02,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:17:02,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-15 16:17:02,302 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-15 16:17:02,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:02,303 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-15 16:17:02,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:02,303 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-15 16:17:02,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:02,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:02,304 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:02,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:02,506 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:02,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:02,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 96 times [2020-10-15 16:17:02,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:02,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578083168] [2020-10-15 16:17:02,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:02,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578083168] [2020-10-15 16:17:02,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724264070] [2020-10-15 16:17:02,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:02,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:17:02,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:02,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:02,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:02,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:02,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:02,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801587028] [2020-10-15 16:17:02,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:02,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:02,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:02,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:02,750 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-15 16:17:03,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:03,021 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-15 16:17:03,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:17:03,021 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:03,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:03,022 INFO L225 Difference]: With dead ends: 201 [2020-10-15 16:17:03,022 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 16:17:03,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:17:03,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 16:17:03,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-15 16:17:03,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 16:17:03,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-15 16:17:03,025 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-15 16:17:03,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:03,025 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-15 16:17:03,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:03,025 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-15 16:17:03,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:03,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:03,026 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:03,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:03,227 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:03,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:03,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 97 times [2020-10-15 16:17:03,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:03,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583872016] [2020-10-15 16:17:03,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:03,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583872016] [2020-10-15 16:17:03,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921882801] [2020-10-15 16:17:03,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:03,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:03,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:03,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:03,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:03,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954919839] [2020-10-15 16:17:03,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:03,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:03,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:03,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:03,486 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-15 16:17:03,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:03,743 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-15 16:17:03,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:17:03,743 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:03,744 INFO L225 Difference]: With dead ends: 194 [2020-10-15 16:17:03,744 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 16:17:03,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:17:03,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 16:17:03,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-15 16:17:03,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:17:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-15 16:17:03,747 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-15 16:17:03,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:03,747 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-15 16:17:03,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:03,748 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-15 16:17:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:03,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:03,748 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:03,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-15 16:17:03,949 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:03,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:03,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 98 times [2020-10-15 16:17:03,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:03,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960069080] [2020-10-15 16:17:03,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:04,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960069080] [2020-10-15 16:17:04,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097662771] [2020-10-15 16:17:04,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 16:17:04,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:04,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:04,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:04,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:04,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:04,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:04,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941051933] [2020-10-15 16:17:04,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:04,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:04,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:04,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:04,223 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-15 16:17:04,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:04,563 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-15 16:17:04,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:17:04,564 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:04,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:04,565 INFO L225 Difference]: With dead ends: 209 [2020-10-15 16:17:04,565 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 16:17:04,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:17:04,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 16:17:04,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-15 16:17:04,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:17:04,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-15 16:17:04,568 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-15 16:17:04,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:04,569 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-15 16:17:04,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:04,569 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-15 16:17:04,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:04,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:04,569 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:04,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:04,780 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:04,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:04,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 99 times [2020-10-15 16:17:04,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:04,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825761706] [2020-10-15 16:17:04,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:04,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825761706] [2020-10-15 16:17:04,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251006883] [2020-10-15 16:17:04,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:04,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:17:04,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:04,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:04,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:05,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:05,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:05,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109421139] [2020-10-15 16:17:05,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:05,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:05,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:05,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:05,051 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-15 16:17:05,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:05,379 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-15 16:17:05,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:17:05,380 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:05,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:05,381 INFO L225 Difference]: With dead ends: 202 [2020-10-15 16:17:05,381 INFO L226 Difference]: Without dead ends: 200 [2020-10-15 16:17:05,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:17:05,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-15 16:17:05,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-15 16:17:05,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:17:05,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-15 16:17:05,384 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-15 16:17:05,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:05,384 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-15 16:17:05,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:05,385 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-15 16:17:05,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:05,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:05,385 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:05,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-15 16:17:05,586 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:05,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:05,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 100 times [2020-10-15 16:17:05,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:05,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590788186] [2020-10-15 16:17:05,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:05,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590788186] [2020-10-15 16:17:05,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480945938] [2020-10-15 16:17:05,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 16:17:05,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:05,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:05,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:05,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:05,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:05,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:05,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834408126] [2020-10-15 16:17:05,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:05,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:05,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:05,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:05,860 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-15 16:17:06,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:06,185 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-15 16:17:06,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:17:06,186 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:06,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:06,186 INFO L225 Difference]: With dead ends: 201 [2020-10-15 16:17:06,186 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 16:17:06,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:17:06,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 16:17:06,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-15 16:17:06,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:17:06,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-15 16:17:06,190 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-15 16:17:06,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:06,190 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-15 16:17:06,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:06,190 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-15 16:17:06,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:06,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:06,191 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:06,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-15 16:17:06,392 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:06,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:06,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 101 times [2020-10-15 16:17:06,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:06,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727295454] [2020-10-15 16:17:06,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:06,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:06,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727295454] [2020-10-15 16:17:06,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222054953] [2020-10-15 16:17:06,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:06,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:17:06,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:06,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:06,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:06,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:06,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:06,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729106809] [2020-10-15 16:17:06,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:06,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:06,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:06,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:06,672 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-15 16:17:07,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:07,177 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-15 16:17:07,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:17:07,177 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:07,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:07,178 INFO L225 Difference]: With dead ends: 215 [2020-10-15 16:17:07,178 INFO L226 Difference]: Without dead ends: 213 [2020-10-15 16:17:07,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:17:07,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-15 16:17:07,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-15 16:17:07,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:17:07,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-15 16:17:07,182 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-15 16:17:07,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:07,182 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-15 16:17:07,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:07,182 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-15 16:17:07,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:07,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:07,183 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:07,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:07,392 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:07,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:07,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 102 times [2020-10-15 16:17:07,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:07,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709286960] [2020-10-15 16:17:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:07,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:07,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709286960] [2020-10-15 16:17:07,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114506244] [2020-10-15 16:17:07,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:07,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:17:07,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:07,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:07,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:07,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:07,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:07,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243443579] [2020-10-15 16:17:07,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:07,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:07,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:07,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:07,661 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-15 16:17:08,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:08,063 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-15 16:17:08,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:17:08,064 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:08,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:08,065 INFO L225 Difference]: With dead ends: 196 [2020-10-15 16:17:08,065 INFO L226 Difference]: Without dead ends: 194 [2020-10-15 16:17:08,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:17:08,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-15 16:17:08,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-15 16:17:08,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:17:08,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 16:17:08,068 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 16:17:08,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:08,068 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 16:17:08,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:08,069 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 16:17:08,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:08,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:08,069 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:08,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:08,272 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:08,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:08,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 103 times [2020-10-15 16:17:08,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:08,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118089843] [2020-10-15 16:17:08,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:08,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118089843] [2020-10-15 16:17:08,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725478485] [2020-10-15 16:17:08,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:08,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:08,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:08,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:17:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:08,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:08,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:08,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272992448] [2020-10-15 16:17:08,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:08,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:08,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:08,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:08,510 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 16:17:08,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:08,824 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-15 16:17:08,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:17:08,825 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:08,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:08,825 INFO L225 Difference]: With dead ends: 191 [2020-10-15 16:17:08,826 INFO L226 Difference]: Without dead ends: 186 [2020-10-15 16:17:08,826 INFO L677 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 [2020-10-15 16:17:08,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-15 16:17:08,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-15 16:17:08,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:17:08,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 16:17:08,830 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 16:17:08,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:08,830 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 16:17:08,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:08,830 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 16:17:08,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:08,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:08,831 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:09,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-15 16:17:09,034 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:09,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:09,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 104 times [2020-10-15 16:17:09,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:09,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120351932] [2020-10-15 16:17:09,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:09,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:09,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120351932] [2020-10-15 16:17:09,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571939980] [2020-10-15 16:17:09,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:09,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:09,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:09,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:09,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:09,294 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:17:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:09,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:09,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:09,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293621523] [2020-10-15 16:17:09,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:09,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:09,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:09,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:09,350 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 16:17:09,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:09,999 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-15 16:17:10,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:17:10,000 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:10,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:10,002 INFO L225 Difference]: With dead ends: 232 [2020-10-15 16:17:10,002 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:17:10,002 INFO L677 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 [2020-10-15 16:17:10,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:17:10,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-15 16:17:10,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:17:10,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-15 16:17:10,007 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-15 16:17:10,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:10,007 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-15 16:17:10,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:10,007 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-15 16:17:10,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:10,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:10,007 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:10,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:10,208 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:10,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:10,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 105 times [2020-10-15 16:17:10,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:10,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186757777] [2020-10-15 16:17:10,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:10,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186757777] [2020-10-15 16:17:10,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220755585] [2020-10-15 16:17:10,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:10,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:17:10,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:10,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:10,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:10,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:10,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:10,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049727615] [2020-10-15 16:17:10,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:10,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:10,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:10,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:10,505 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-15 16:17:11,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:11,130 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-10-15 16:17:11,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:17:11,131 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:11,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:11,132 INFO L225 Difference]: With dead ends: 222 [2020-10-15 16:17:11,132 INFO L226 Difference]: Without dead ends: 220 [2020-10-15 16:17:11,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:17:11,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-15 16:17:11,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-10-15 16:17:11,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:17:11,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 16:17:11,135 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 16:17:11,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:11,136 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 16:17:11,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:11,136 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 16:17:11,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:11,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:11,136 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:11,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:11,337 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:11,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:11,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 106 times [2020-10-15 16:17:11,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:11,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498846979] [2020-10-15 16:17:11,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:11,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498846979] [2020-10-15 16:17:11,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373053624] [2020-10-15 16:17:11,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:11,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:11,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:11,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:11,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:11,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:17:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:11,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:11,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:11,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009498031] [2020-10-15 16:17:11,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:11,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:11,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:11,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:11,640 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 16:17:12,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:12,460 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-15 16:17:12,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:17:12,461 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:12,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:12,462 INFO L225 Difference]: With dead ends: 254 [2020-10-15 16:17:12,462 INFO L226 Difference]: Without dead ends: 246 [2020-10-15 16:17:12,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:17:12,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-15 16:17:12,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-15 16:17:12,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 16:17:12,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-15 16:17:12,466 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-15 16:17:12,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:12,466 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-15 16:17:12,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:12,466 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-15 16:17:12,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:12,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:12,467 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:12,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:12,670 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:12,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:12,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 107 times [2020-10-15 16:17:12,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:12,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538992096] [2020-10-15 16:17:12,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:12,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538992096] [2020-10-15 16:17:12,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21865768] [2020-10-15 16:17:12,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:12,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:17:12,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:12,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:12,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:12,922 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:17:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:12,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:12,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:12,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935636344] [2020-10-15 16:17:12,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:12,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:12,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:12,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:12,957 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-15 16:17:13,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:13,789 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-15 16:17:13,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:17:13,790 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:13,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:13,791 INFO L225 Difference]: With dead ends: 246 [2020-10-15 16:17:13,791 INFO L226 Difference]: Without dead ends: 238 [2020-10-15 16:17:13,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:17:13,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-15 16:17:13,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-15 16:17:13,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:17:13,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-15 16:17:13,795 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-15 16:17:13,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:13,796 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-15 16:17:13,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:13,796 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-15 16:17:13,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:13,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:13,796 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:14,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-15 16:17:14,007 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:14,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:14,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 108 times [2020-10-15 16:17:14,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:14,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783598268] [2020-10-15 16:17:14,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:14,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783598268] [2020-10-15 16:17:14,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533605185] [2020-10-15 16:17:14,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:14,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:17:14,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:14,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:14,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:14,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:14,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:14,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213218331] [2020-10-15 16:17:14,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:14,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:14,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:14,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:14,282 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-15 16:17:14,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:14,711 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-15 16:17:14,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:17:14,712 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:14,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:14,712 INFO L225 Difference]: With dead ends: 208 [2020-10-15 16:17:14,712 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 16:17:14,713 INFO L677 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 [2020-10-15 16:17:14,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 16:17:14,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-15 16:17:14,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 16:17:14,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-15 16:17:14,715 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-15 16:17:14,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:14,715 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-15 16:17:14,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:14,715 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-15 16:17:14,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:14,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:14,715 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:14,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-15 16:17:14,916 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:14,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:14,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 109 times [2020-10-15 16:17:14,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:14,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388998031] [2020-10-15 16:17:14,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:15,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:15,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388998031] [2020-10-15 16:17:15,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558326552] [2020-10-15 16:17:15,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:15,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:15,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:15,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:15,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:15,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:15,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795333305] [2020-10-15 16:17:15,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:15,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:15,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:15,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:15,174 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-15 16:17:15,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:15,734 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-15 16:17:15,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:17:15,735 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:15,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:15,736 INFO L225 Difference]: With dead ends: 215 [2020-10-15 16:17:15,736 INFO L226 Difference]: Without dead ends: 213 [2020-10-15 16:17:15,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:17:15,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-15 16:17:15,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-15 16:17:15,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 16:17:15,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-15 16:17:15,739 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-15 16:17:15,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:15,739 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-15 16:17:15,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:15,739 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-15 16:17:15,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:15,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:15,740 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:15,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-15 16:17:15,940 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:15,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:15,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 110 times [2020-10-15 16:17:15,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:15,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773480568] [2020-10-15 16:17:15,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:16,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:16,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773480568] [2020-10-15 16:17:16,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111912396] [2020-10-15 16:17:16,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:16,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:16,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:16,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:16,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:16,186 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:17:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:16,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:16,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:16,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222268943] [2020-10-15 16:17:16,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:16,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:16,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:16,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:16,205 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-15 16:17:16,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:16,818 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-15 16:17:16,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:17:16,818 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:16,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:16,819 INFO L225 Difference]: With dead ends: 236 [2020-10-15 16:17:16,819 INFO L226 Difference]: Without dead ends: 228 [2020-10-15 16:17:16,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:17:16,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-15 16:17:16,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-15 16:17:16,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 16:17:16,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-15 16:17:16,822 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-15 16:17:16,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:16,822 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-15 16:17:16,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:16,822 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-15 16:17:16,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:16,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:16,823 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:17,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-15 16:17:17,024 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:17,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:17,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 111 times [2020-10-15 16:17:17,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:17,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586779928] [2020-10-15 16:17:17,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:17,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586779928] [2020-10-15 16:17:17,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471791702] [2020-10-15 16:17:17,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:17,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:17:17,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:17,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:17,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:17,279 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:17:17,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:17,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:17,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:17,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289429559] [2020-10-15 16:17:17,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:17,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:17,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:17,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:17,295 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-15 16:17:17,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:17,936 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-15 16:17:17,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:17:17,937 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:17,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:17,938 INFO L225 Difference]: With dead ends: 241 [2020-10-15 16:17:17,940 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:17:17,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:17:17,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:17:17,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-15 16:17:17,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-15 16:17:17,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-15 16:17:17,944 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-15 16:17:17,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:17,944 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-15 16:17:17,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:17,944 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-15 16:17:17,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:17,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:17,945 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:18,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-15 16:17:18,155 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:18,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:18,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 112 times [2020-10-15 16:17:18,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:18,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599380087] [2020-10-15 16:17:18,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:18,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599380087] [2020-10-15 16:17:18,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569187911] [2020-10-15 16:17:18,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:18,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:18,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:18,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:17:18,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:18,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:17:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:18,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:18,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:17:18,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968731640] [2020-10-15 16:17:18,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:17:18,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:18,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:17:18,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:17:18,407 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-15 16:17:19,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:19,050 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-15 16:17:19,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:17:19,051 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:17:19,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:19,053 INFO L225 Difference]: With dead ends: 232 [2020-10-15 16:17:19,053 INFO L226 Difference]: Without dead ends: 224 [2020-10-15 16:17:19,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:17:19,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-15 16:17:19,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-15 16:17:19,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-15 16:17:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-15 16:17:19,057 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-15 16:17:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:19,057 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-15 16:17:19,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:17:19,057 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-15 16:17:19,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:19,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:19,058 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:19,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:19,268 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:19,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:19,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-10-15 16:17:19,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:19,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795810645] [2020-10-15 16:17:19,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:19,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795810645] [2020-10-15 16:17:19,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222345036] [2020-10-15 16:17:19,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:19,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:17:19,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:19,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:19,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:19,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:17:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:19,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:19,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 16:17:19,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734069349] [2020-10-15 16:17:19,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:17:19,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:19,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:17:19,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:17:19,653 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-10-15 16:17:19,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:19,928 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-10-15 16:17:19,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:17:19,930 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-10-15 16:17:19,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:19,931 INFO L225 Difference]: With dead ends: 185 [2020-10-15 16:17:19,931 INFO L226 Difference]: Without dead ends: 180 [2020-10-15 16:17:19,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:17:19,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-15 16:17:19,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-10-15 16:17:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:17:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-15 16:17:19,936 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-15 16:17:19,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:19,936 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-15 16:17:19,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:17:19,936 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-15 16:17:19,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:19,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:19,937 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:20,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-15 16:17:20,148 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:20,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:20,149 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-10-15 16:17:20,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:20,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22290673] [2020-10-15 16:17:20,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:20,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22290673] [2020-10-15 16:17:20,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35885643] [2020-10-15 16:17:20,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:20,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:17:20,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:20,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:20,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:20,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:20,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:20,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502249007] [2020-10-15 16:17:20,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:20,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:20,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:20,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:20,694 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-10-15 16:17:20,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:20,780 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-10-15 16:17:20,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:17:20,781 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:17:20,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:20,781 INFO L225 Difference]: With dead ends: 180 [2020-10-15 16:17:20,782 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 16:17:20,782 INFO L677 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 [2020-10-15 16:17:20,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 16:17:20,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-10-15 16:17:20,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 16:17:20,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-15 16:17:20,785 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-15 16:17:20,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:20,786 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-15 16:17:20,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:20,786 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-15 16:17:20,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:20,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:20,787 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:20,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-15 16:17:20,995 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:20,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:20,996 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-10-15 16:17:20,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:20,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141687115] [2020-10-15 16:17:20,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:21,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141687115] [2020-10-15 16:17:21,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287582843] [2020-10-15 16:17:21,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:21,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:21,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:21,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:21,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:21,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:21,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:21,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030997863] [2020-10-15 16:17:21,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:21,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:21,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:21,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:21,366 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-15 16:17:21,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:21,460 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-10-15 16:17:21,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:17:21,461 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:17:21,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:21,462 INFO L225 Difference]: With dead ends: 197 [2020-10-15 16:17:21,462 INFO L226 Difference]: Without dead ends: 194 [2020-10-15 16:17:21,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:17:21,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-15 16:17:21,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-10-15 16:17:21,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 16:17:21,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-15 16:17:21,465 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-15 16:17:21,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:21,466 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-15 16:17:21,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:21,466 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-15 16:17:21,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:21,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:21,467 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:21,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:21,675 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:21,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:21,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-10-15 16:17:21,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:21,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392427525] [2020-10-15 16:17:21,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:21,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392427525] [2020-10-15 16:17:21,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508885238] [2020-10-15 16:17:21,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:21,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:17:21,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:21,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:21,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:22,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:22,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:22,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266021878] [2020-10-15 16:17:22,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:22,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:22,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:22,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:22,025 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-15 16:17:22,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:22,137 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-10-15 16:17:22,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:17:22,137 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:17:22,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:22,138 INFO L225 Difference]: With dead ends: 196 [2020-10-15 16:17:22,138 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 16:17:22,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:17:22,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 16:17:22,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-10-15 16:17:22,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-15 16:17:22,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-10-15 16:17:22,142 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-10-15 16:17:22,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:22,142 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-10-15 16:17:22,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:22,142 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-10-15 16:17:22,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:22,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:22,142 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:22,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:22,343 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:22,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:22,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-10-15 16:17:22,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:22,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626926210] [2020-10-15 16:17:22,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:22,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626926210] [2020-10-15 16:17:22,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741701927] [2020-10-15 16:17:22,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:22,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:17:22,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:22,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:22,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:22,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:22,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:22,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979741586] [2020-10-15 16:17:22,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:22,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:22,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:22,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:22,682 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-10-15 16:17:22,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:22,820 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-15 16:17:22,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:17:22,821 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:17:22,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:22,821 INFO L225 Difference]: With dead ends: 195 [2020-10-15 16:17:22,821 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 16:17:22,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:17:22,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 16:17:22,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-10-15 16:17:22,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-15 16:17:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-10-15 16:17:22,824 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-10-15 16:17:22,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:22,825 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-10-15 16:17:22,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:22,825 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-10-15 16:17:22,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:22,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:22,825 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:23,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:23,026 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:23,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:23,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-10-15 16:17:23,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:23,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605829938] [2020-10-15 16:17:23,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:23,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605829938] [2020-10-15 16:17:23,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938473221] [2020-10-15 16:17:23,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:23,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:23,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:23,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:23,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:23,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625401863] [2020-10-15 16:17:23,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:23,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:23,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:23,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:23,446 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-10-15 16:17:23,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:23,691 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-10-15 16:17:23,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:17:23,692 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:17:23,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:23,694 INFO L225 Difference]: With dead ends: 194 [2020-10-15 16:17:23,694 INFO L226 Difference]: Without dead ends: 191 [2020-10-15 16:17:23,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:17:23,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-15 16:17:23,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-10-15 16:17:23,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-15 16:17:23,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-10-15 16:17:23,699 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-10-15 16:17:23,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:23,699 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-10-15 16:17:23,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:23,700 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-10-15 16:17:23,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:23,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:23,701 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:23,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:23,911 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:23,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:23,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-10-15 16:17:23,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:23,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789447877] [2020-10-15 16:17:23,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:24,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789447877] [2020-10-15 16:17:24,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096159402] [2020-10-15 16:17:24,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:24,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:24,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:24,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:24,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:24,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:24,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:24,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396537987] [2020-10-15 16:17:24,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:24,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:24,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:24,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:24,273 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-10-15 16:17:24,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:24,523 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-10-15 16:17:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:17:24,523 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:17:24,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:24,524 INFO L225 Difference]: With dead ends: 193 [2020-10-15 16:17:24,524 INFO L226 Difference]: Without dead ends: 190 [2020-10-15 16:17:24,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:17:24,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-15 16:17:24,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-10-15 16:17:24,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-15 16:17:24,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-10-15 16:17:24,527 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-10-15 16:17:24,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:24,528 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-10-15 16:17:24,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:24,528 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-10-15 16:17:24,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:17:24,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:24,528 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:24,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-15 16:17:24,729 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:24,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:24,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-10-15 16:17:24,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:24,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073661507] [2020-10-15 16:17:24,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:24,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073661507] [2020-10-15 16:17:24,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233479532] [2020-10-15 16:17:24,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:24,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:17:24,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:24,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:24,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:25,051 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:17:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:25,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:25,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:25,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084057795] [2020-10-15 16:17:25,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:25,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:25,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:25,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:25,068 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-10-15 16:17:25,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:25,334 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-15 16:17:25,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:17:25,335 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:17:25,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:25,336 INFO L225 Difference]: With dead ends: 202 [2020-10-15 16:17:25,336 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 16:17:25,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:17:25,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 16:17:25,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-10-15 16:17:25,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-15 16:17:25,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-10-15 16:17:25,340 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-10-15 16:17:25,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:25,340 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-10-15 16:17:25,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:25,341 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-10-15 16:17:25,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:25,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:25,341 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:25,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-15 16:17:25,550 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:25,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:25,551 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 113 times [2020-10-15 16:17:25,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:25,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626813531] [2020-10-15 16:17:25,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:25,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:25,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626813531] [2020-10-15 16:17:25,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292636522] [2020-10-15 16:17:25,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:25,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:17:25,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:25,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:25,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:25,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:25,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:25,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004106546] [2020-10-15 16:17:25,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:25,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:25,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:25,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:25,897 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-10-15 16:17:25,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:25,961 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-10-15 16:17:25,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:17:25,962 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:25,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:25,962 INFO L225 Difference]: With dead ends: 188 [2020-10-15 16:17:25,963 INFO L226 Difference]: Without dead ends: 186 [2020-10-15 16:17:25,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:25,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-15 16:17:25,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-10-15 16:17:25,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 16:17:25,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-10-15 16:17:25,966 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-10-15 16:17:25,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:25,966 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-10-15 16:17:25,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:25,967 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-10-15 16:17:25,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:25,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:25,967 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:26,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-15 16:17:26,176 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:26,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:26,176 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 114 times [2020-10-15 16:17:26,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:26,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132082876] [2020-10-15 16:17:26,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:26,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:26,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132082876] [2020-10-15 16:17:26,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951074028] [2020-10-15 16:17:26,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:26,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:17:26,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:26,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:26,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:26,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:26,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:26,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:26,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073554197] [2020-10-15 16:17:26,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:26,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:26,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:26,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:26,547 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-10-15 16:17:26,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:26,786 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-10-15 16:17:26,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:17:26,787 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:26,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:26,787 INFO L225 Difference]: With dead ends: 199 [2020-10-15 16:17:26,787 INFO L226 Difference]: Without dead ends: 197 [2020-10-15 16:17:26,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:17:26,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-15 16:17:26,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-10-15 16:17:26,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-15 16:17:26,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-15 16:17:26,791 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-15 16:17:26,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:26,791 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-15 16:17:26,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:26,791 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-15 16:17:26,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:26,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:26,791 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:26,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-15 16:17:26,992 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:26,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:26,992 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 115 times [2020-10-15 16:17:26,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:26,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410419532] [2020-10-15 16:17:26,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:27,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410419532] [2020-10-15 16:17:27,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138438665] [2020-10-15 16:17:27,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:27,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:27,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:27,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:27,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:27,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256643814] [2020-10-15 16:17:27,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:27,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:27,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:27,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:27,417 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-15 16:17:27,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:27,735 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-15 16:17:27,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:17:27,737 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:27,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:27,737 INFO L225 Difference]: With dead ends: 210 [2020-10-15 16:17:27,738 INFO L226 Difference]: Without dead ends: 208 [2020-10-15 16:17:27,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:17:27,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-15 16:17:27,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-10-15 16:17:27,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-15 16:17:27,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-10-15 16:17:27,741 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-10-15 16:17:27,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:27,741 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-10-15 16:17:27,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:27,741 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-10-15 16:17:27,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:27,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:27,742 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:27,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-15 16:17:27,942 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:27,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:27,943 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 116 times [2020-10-15 16:17:27,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:27,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978508404] [2020-10-15 16:17:27,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:28,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978508404] [2020-10-15 16:17:28,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439251164] [2020-10-15 16:17:28,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 16:17:28,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:28,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:28,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:28,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:28,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:28,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:28,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:28,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415616988] [2020-10-15 16:17:28,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:28,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:28,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:28,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:28,341 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-10-15 16:17:28,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:28,684 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-15 16:17:28,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:17:28,684 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:28,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:28,685 INFO L225 Difference]: With dead ends: 210 [2020-10-15 16:17:28,685 INFO L226 Difference]: Without dead ends: 208 [2020-10-15 16:17:28,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:17:28,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-15 16:17:28,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-10-15 16:17:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-15 16:17:28,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-15 16:17:28,690 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-15 16:17:28,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:28,690 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-15 16:17:28,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:28,690 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-15 16:17:28,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:28,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:28,691 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:28,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-15 16:17:28,894 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:28,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:28,894 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 117 times [2020-10-15 16:17:28,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:28,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744650399] [2020-10-15 16:17:28,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:29,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744650399] [2020-10-15 16:17:29,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359880240] [2020-10-15 16:17:29,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:29,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:17:29,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:29,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:29,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:33,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:33,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:33,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:33,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796318224] [2020-10-15 16:17:33,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:33,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:33,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:33,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:17:33,325 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-15 16:17:37,527 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:17:37,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:37,809 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-15 16:17:37,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:17:37,810 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:37,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:37,812 INFO L225 Difference]: With dead ends: 218 [2020-10-15 16:17:37,812 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 16:17:37,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-10-15 16:17:37,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 16:17:37,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-15 16:17:37,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 16:17:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 16:17:37,816 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 16:17:37,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:37,816 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 16:17:37,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:37,816 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 16:17:37,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:37,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:37,817 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:38,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:38,026 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:38,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:38,027 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 118 times [2020-10-15 16:17:38,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:38,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815643596] [2020-10-15 16:17:38,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:38,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815643596] [2020-10-15 16:17:38,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375596142] [2020-10-15 16:17:38,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:38,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:38,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:38,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:38,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:38,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:38,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:38,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570749972] [2020-10-15 16:17:38,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:38,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:38,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:38,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:38,512 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 16:17:38,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:38,928 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-10-15 16:17:38,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:17:38,928 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:38,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:38,929 INFO L225 Difference]: With dead ends: 212 [2020-10-15 16:17:38,929 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 16:17:38,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:17:38,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 16:17:38,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-10-15 16:17:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-15 16:17:38,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-10-15 16:17:38,931 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-10-15 16:17:38,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:38,932 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-10-15 16:17:38,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:38,932 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-10-15 16:17:38,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:38,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:38,932 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:39,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:39,133 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:39,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:39,134 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 119 times [2020-10-15 16:17:39,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:39,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573786108] [2020-10-15 16:17:39,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:39,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:39,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573786108] [2020-10-15 16:17:39,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571373405] [2020-10-15 16:17:39,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:39,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:17:39,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:39,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:39,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:39,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:39,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:39,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957529660] [2020-10-15 16:17:39,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:39,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:39,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:39,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:39,500 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-10-15 16:17:39,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:39,882 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-15 16:17:39,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:17:39,883 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:39,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:39,884 INFO L225 Difference]: With dead ends: 212 [2020-10-15 16:17:39,884 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 16:17:39,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:17:39,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 16:17:39,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-10-15 16:17:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 16:17:39,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 16:17:39,889 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 16:17:39,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:39,889 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 16:17:39,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:39,890 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 16:17:39,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:39,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:39,890 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:40,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:40,102 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:40,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:40,102 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 120 times [2020-10-15 16:17:40,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:40,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312201069] [2020-10-15 16:17:40,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:40,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:40,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312201069] [2020-10-15 16:17:40,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887840884] [2020-10-15 16:17:40,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:40,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:17:40,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:40,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:40,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:40,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:40,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:40,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737592140] [2020-10-15 16:17:40,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:40,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:40,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:40,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:40,471 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 16:17:40,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:40,887 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-10-15 16:17:40,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:17:40,887 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:40,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:40,888 INFO L225 Difference]: With dead ends: 224 [2020-10-15 16:17:40,888 INFO L226 Difference]: Without dead ends: 222 [2020-10-15 16:17:40,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:17:40,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-15 16:17:40,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-10-15 16:17:40,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 16:17:40,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 16:17:40,892 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 16:17:40,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:40,892 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 16:17:40,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:40,892 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 16:17:40,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:40,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:40,893 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:41,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:41,095 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:41,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:41,095 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 121 times [2020-10-15 16:17:41,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:41,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476092167] [2020-10-15 16:17:41,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:41,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476092167] [2020-10-15 16:17:41,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344290142] [2020-10-15 16:17:41,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:41,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:41,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:41,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:41,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:41,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609377290] [2020-10-15 16:17:41,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:41,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:41,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:41,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:41,456 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 16:17:41,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:41,814 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-10-15 16:17:41,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:17:41,814 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:41,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:41,815 INFO L225 Difference]: With dead ends: 218 [2020-10-15 16:17:41,815 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 16:17:41,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:17:41,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 16:17:41,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-15 16:17:41,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 16:17:41,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 16:17:41,818 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 16:17:41,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:41,818 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 16:17:41,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:41,819 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 16:17:41,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:41,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:41,819 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:42,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:42,020 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:42,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:42,020 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 122 times [2020-10-15 16:17:42,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:42,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642661815] [2020-10-15 16:17:42,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:42,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642661815] [2020-10-15 16:17:42,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375878054] [2020-10-15 16:17:42,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:42,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:42,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:42,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:42,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:42,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:42,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:42,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904790446] [2020-10-15 16:17:42,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:42,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:42,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:42,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:42,361 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 16:17:42,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:42,665 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-10-15 16:17:42,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:17:42,666 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:42,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:42,667 INFO L225 Difference]: With dead ends: 206 [2020-10-15 16:17:42,667 INFO L226 Difference]: Without dead ends: 204 [2020-10-15 16:17:42,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:17:42,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-15 16:17:42,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-10-15 16:17:42,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-15 16:17:42,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-10-15 16:17:42,670 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-10-15 16:17:42,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:42,670 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-10-15 16:17:42,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:42,670 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-10-15 16:17:42,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:42,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:42,671 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:42,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-15 16:17:42,872 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:42,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:42,872 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 123 times [2020-10-15 16:17:42,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:42,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523803707] [2020-10-15 16:17:42,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:43,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:43,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523803707] [2020-10-15 16:17:43,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104036408] [2020-10-15 16:17:43,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:43,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:17:43,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:43,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:43,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:43,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:43,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:43,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350658788] [2020-10-15 16:17:43,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:43,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:43,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:43,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:43,242 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-10-15 16:17:43,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:43,527 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-10-15 16:17:43,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:17:43,528 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:43,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:43,529 INFO L225 Difference]: With dead ends: 207 [2020-10-15 16:17:43,529 INFO L226 Difference]: Without dead ends: 205 [2020-10-15 16:17:43,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:17:43,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-15 16:17:43,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-10-15 16:17:43,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 16:17:43,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-10-15 16:17:43,532 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-10-15 16:17:43,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:43,532 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-10-15 16:17:43,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:43,532 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-10-15 16:17:43,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:43,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:43,532 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:43,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-15 16:17:43,733 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:43,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:43,734 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 124 times [2020-10-15 16:17:43,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:43,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018614730] [2020-10-15 16:17:43,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:43,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018614730] [2020-10-15 16:17:43,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875500261] [2020-10-15 16:17:43,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:43,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:43,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:43,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:43,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:44,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:44,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:44,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:44,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422515659] [2020-10-15 16:17:44,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:44,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:44,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:44,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:44,112 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-10-15 16:17:44,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:44,466 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-10-15 16:17:44,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:17:44,467 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:44,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:44,468 INFO L225 Difference]: With dead ends: 217 [2020-10-15 16:17:44,468 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 16:17:44,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:17:44,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 16:17:44,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-10-15 16:17:44,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 16:17:44,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-10-15 16:17:44,472 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-10-15 16:17:44,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:44,472 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-10-15 16:17:44,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:44,472 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-10-15 16:17:44,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:44,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:44,472 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:44,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-15 16:17:44,673 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:44,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:44,674 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 125 times [2020-10-15 16:17:44,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:44,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751728738] [2020-10-15 16:17:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:44,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751728738] [2020-10-15 16:17:44,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772856102] [2020-10-15 16:17:44,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:44,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:17:44,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:44,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:44,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:45,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:45,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:45,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19388711] [2020-10-15 16:17:45,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:45,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:45,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:45,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:45,149 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-10-15 16:17:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:45,609 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-10-15 16:17:45,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:17:45,610 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:45,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:45,611 INFO L225 Difference]: With dead ends: 223 [2020-10-15 16:17:45,611 INFO L226 Difference]: Without dead ends: 221 [2020-10-15 16:17:45,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:17:45,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-15 16:17:45,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-10-15 16:17:45,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:17:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-10-15 16:17:45,615 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-10-15 16:17:45,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:45,615 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-10-15 16:17:45,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:45,615 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-10-15 16:17:45,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:45,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:45,616 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:45,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-15 16:17:45,819 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:45,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:45,819 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 126 times [2020-10-15 16:17:45,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:45,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717950343] [2020-10-15 16:17:45,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:45,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717950343] [2020-10-15 16:17:45,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426287142] [2020-10-15 16:17:45,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:45,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:17:45,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:45,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:45,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:46,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:46,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:46,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75712977] [2020-10-15 16:17:46,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:46,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:46,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:46,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:46,156 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-10-15 16:17:46,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:46,495 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-10-15 16:17:46,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:17:46,496 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:46,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:46,497 INFO L225 Difference]: With dead ends: 225 [2020-10-15 16:17:46,497 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 16:17:46,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:17:46,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 16:17:46,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-10-15 16:17:46,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 16:17:46,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-10-15 16:17:46,501 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-10-15 16:17:46,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:46,501 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-10-15 16:17:46,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:46,501 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-10-15 16:17:46,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:46,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:46,502 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:46,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:46,703 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:46,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:46,703 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 127 times [2020-10-15 16:17:46,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:46,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673031942] [2020-10-15 16:17:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:46,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673031942] [2020-10-15 16:17:46,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248105946] [2020-10-15 16:17:46,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:46,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:46,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:47,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:47,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:47,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109965811] [2020-10-15 16:17:47,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:47,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:47,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:47,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:47,097 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-10-15 16:17:47,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:47,437 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-10-15 16:17:47,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:17:47,437 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:47,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:47,438 INFO L225 Difference]: With dead ends: 214 [2020-10-15 16:17:47,438 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 16:17:47,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:17:47,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 16:17:47,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-10-15 16:17:47,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:17:47,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-10-15 16:17:47,442 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-10-15 16:17:47,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:47,442 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-10-15 16:17:47,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:47,442 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-10-15 16:17:47,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:47,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:47,443 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:47,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:47,644 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:47,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:47,644 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 128 times [2020-10-15 16:17:47,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:47,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764443379] [2020-10-15 16:17:47,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:47,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764443379] [2020-10-15 16:17:47,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896664411] [2020-10-15 16:17:47,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:47,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:47,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:47,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:47,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:48,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:48,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:48,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738869132] [2020-10-15 16:17:48,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:48,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:48,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:48,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:48,049 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-10-15 16:17:48,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:48,286 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-10-15 16:17:48,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:17:48,287 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:48,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:48,287 INFO L225 Difference]: With dead ends: 203 [2020-10-15 16:17:48,287 INFO L226 Difference]: Without dead ends: 201 [2020-10-15 16:17:48,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:17:48,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-15 16:17:48,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-10-15 16:17:48,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 16:17:48,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-10-15 16:17:48,291 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-10-15 16:17:48,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:48,291 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-10-15 16:17:48,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:48,291 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-10-15 16:17:48,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:48,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:48,291 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:48,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-15 16:17:48,492 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:48,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:48,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 129 times [2020-10-15 16:17:48,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:48,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732270885] [2020-10-15 16:17:48,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:48,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732270885] [2020-10-15 16:17:48,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349759276] [2020-10-15 16:17:48,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:48,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:17:48,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:48,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:48,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:48,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:48,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:48,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:48,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323147332] [2020-10-15 16:17:48,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:48,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:48,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:48,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:48,930 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-10-15 16:17:49,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:49,015 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-15 16:17:49,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:17:49,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:49,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:49,017 INFO L225 Difference]: With dead ends: 212 [2020-10-15 16:17:49,017 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 16:17:49,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:17:49,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 16:17:49,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-10-15 16:17:49,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:17:49,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-10-15 16:17:49,020 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-10-15 16:17:49,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:49,021 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-10-15 16:17:49,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:49,021 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-10-15 16:17:49,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:49,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:49,021 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:49,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:49,222 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:49,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:49,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 130 times [2020-10-15 16:17:49,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:49,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865972055] [2020-10-15 16:17:49,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:49,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865972055] [2020-10-15 16:17:49,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079076492] [2020-10-15 16:17:49,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:49,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:49,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:49,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:49,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:49,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:49,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:49,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:49,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20707048] [2020-10-15 16:17:49,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:49,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:49,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:49,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:49,725 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-10-15 16:17:50,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:50,012 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-10-15 16:17:50,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:17:50,013 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:50,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:50,014 INFO L225 Difference]: With dead ends: 217 [2020-10-15 16:17:50,014 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 16:17:50,014 INFO L677 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 [2020-10-15 16:17:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 16:17:50,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-10-15 16:17:50,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:17:50,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-15 16:17:50,018 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-15 16:17:50,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:50,018 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-15 16:17:50,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:50,018 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-15 16:17:50,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:50,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:50,019 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:50,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:50,219 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:50,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:50,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 131 times [2020-10-15 16:17:50,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:50,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5395000] [2020-10-15 16:17:50,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:50,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5395000] [2020-10-15 16:17:50,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526026071] [2020-10-15 16:17:50,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:50,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:17:50,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:50,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:50,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:50,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:50,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:50,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666439911] [2020-10-15 16:17:50,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:50,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:50,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:50,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:50,686 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-15 16:17:51,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:51,054 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-15 16:17:51,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:17:51,055 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:51,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:51,055 INFO L225 Difference]: With dead ends: 227 [2020-10-15 16:17:51,055 INFO L226 Difference]: Without dead ends: 225 [2020-10-15 16:17:51,055 INFO L677 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 [2020-10-15 16:17:51,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-15 16:17:51,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-10-15 16:17:51,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:17:51,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-10-15 16:17:51,059 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-10-15 16:17:51,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:51,059 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-10-15 16:17:51,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:51,059 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-10-15 16:17:51,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:51,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:51,059 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:51,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:51,260 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:51,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:51,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 132 times [2020-10-15 16:17:51,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:51,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375708068] [2020-10-15 16:17:51,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:51,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:51,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375708068] [2020-10-15 16:17:51,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372174231] [2020-10-15 16:17:51,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:51,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:17:51,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:51,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:51,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:51,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:51,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:51,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105075926] [2020-10-15 16:17:51,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:51,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:51,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:51,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:51,669 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-10-15 16:17:52,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:52,125 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-15 16:17:52,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:17:52,126 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:52,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:52,127 INFO L225 Difference]: With dead ends: 227 [2020-10-15 16:17:52,127 INFO L226 Difference]: Without dead ends: 225 [2020-10-15 16:17:52,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:17:52,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-15 16:17:52,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-10-15 16:17:52,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:17:52,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-15 16:17:52,130 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-15 16:17:52,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:52,131 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-15 16:17:52,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:52,131 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-15 16:17:52,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:52,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:52,131 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:52,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-15 16:17:52,334 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:52,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:52,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 133 times [2020-10-15 16:17:52,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:52,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081341119] [2020-10-15 16:17:52,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:52,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081341119] [2020-10-15 16:17:52,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811278498] [2020-10-15 16:17:52,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:52,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:52,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:56,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:56,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:56,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:56,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334618002] [2020-10-15 16:17:56,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:56,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:56,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:56,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:17:56,520 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-15 16:18:00,775 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:18:01,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:01,136 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-10-15 16:18:01,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:18:01,137 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:01,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:01,137 INFO L225 Difference]: With dead ends: 237 [2020-10-15 16:18:01,137 INFO L226 Difference]: Without dead ends: 235 [2020-10-15 16:18:01,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-10-15 16:18:01,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-15 16:18:01,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-10-15 16:18:01,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:18:01,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 16:18:01,141 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 16:18:01,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:01,141 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 16:18:01,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:01,141 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 16:18:01,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:01,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:01,142 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:01,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-15 16:18:01,343 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:01,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:01,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1997527705, now seen corresponding path program 134 times [2020-10-15 16:18:01,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:01,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055848349] [2020-10-15 16:18:01,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:01,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055848349] [2020-10-15 16:18:01,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198676968] [2020-10-15 16:18:01,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:01,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:18:01,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:01,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:01,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:01,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:01,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:01,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115539596] [2020-10-15 16:18:01,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:01,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:01,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:01,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:01,796 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 16:18:02,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:02,302 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-10-15 16:18:02,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:18:02,303 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:02,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:02,304 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:18:02,304 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:18:02,305 INFO L677 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 [2020-10-15 16:18:02,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:18:02,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-15 16:18:02,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:18:02,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-10-15 16:18:02,308 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-10-15 16:18:02,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:02,308 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-10-15 16:18:02,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:02,309 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-10-15 16:18:02,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:02,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:02,309 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:02,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-15 16:18:02,510 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:02,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:02,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1969851866, now seen corresponding path program 135 times [2020-10-15 16:18:02,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:02,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894086443] [2020-10-15 16:18:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:02,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:02,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894086443] [2020-10-15 16:18:02,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002192834] [2020-10-15 16:18:02,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:02,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:18:02,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:02,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:02,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:02,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:02,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:02,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321170380] [2020-10-15 16:18:02,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:02,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:02,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:02,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:02,902 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-10-15 16:18:03,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:03,369 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-10-15 16:18:03,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:18:03,370 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:03,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:03,371 INFO L225 Difference]: With dead ends: 225 [2020-10-15 16:18:03,371 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 16:18:03,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:18:03,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 16:18:03,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-10-15 16:18:03,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:18:03,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 16:18:03,373 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 16:18:03,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:03,374 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 16:18:03,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:03,374 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 16:18:03,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:03,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:03,374 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:03,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-15 16:18:03,575 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:03,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:03,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1969850905, now seen corresponding path program 136 times [2020-10-15 16:18:03,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:03,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555771335] [2020-10-15 16:18:03,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:03,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555771335] [2020-10-15 16:18:03,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647629939] [2020-10-15 16:18:03,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:03,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:18:03,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:03,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:03,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:04,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:04,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:04,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575047976] [2020-10-15 16:18:04,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:04,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:04,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:04,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:04,011 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 16:18:04,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:04,769 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-10-15 16:18:04,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:18:04,771 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:04,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:04,771 INFO L225 Difference]: With dead ends: 239 [2020-10-15 16:18:04,771 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 16:18:04,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:18:04,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 16:18:04,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-15 16:18:04,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:18:04,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 16:18:04,774 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 16:18:04,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:04,775 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 16:18:04,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:04,775 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 16:18:04,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:04,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:04,775 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:04,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-15 16:18:04,976 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:04,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:04,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1969822075, now seen corresponding path program 137 times [2020-10-15 16:18:04,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:04,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982531839] [2020-10-15 16:18:04,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:05,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982531839] [2020-10-15 16:18:05,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010963490] [2020-10-15 16:18:05,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:05,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:18:05,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:05,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:05,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:05,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:05,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:05,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121400568] [2020-10-15 16:18:05,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:05,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:05,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:05,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:05,352 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 16:18:05,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:05,783 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-10-15 16:18:05,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:18:05,785 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:05,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:05,785 INFO L225 Difference]: With dead ends: 234 [2020-10-15 16:18:05,785 INFO L226 Difference]: Without dead ends: 232 [2020-10-15 16:18:05,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:18:05,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-15 16:18:05,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-10-15 16:18:05,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:18:05,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 16:18:05,788 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 16:18:05,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:05,788 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 16:18:05,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:05,788 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 16:18:05,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:05,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:05,789 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:05,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-10-15 16:18:05,996 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:05,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:05,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1968897593, now seen corresponding path program 138 times [2020-10-15 16:18:05,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:05,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228227747] [2020-10-15 16:18:05,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:06,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228227747] [2020-10-15 16:18:06,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696143854] [2020-10-15 16:18:06,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:06,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:18:06,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:06,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:06,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:06,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:06,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:06,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528294484] [2020-10-15 16:18:06,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:06,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:06,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:06,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:06,347 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 16:18:06,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:06,718 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-10-15 16:18:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:18:06,719 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:06,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:06,719 INFO L225 Difference]: With dead ends: 218 [2020-10-15 16:18:06,719 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 16:18:06,720 INFO L677 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 [2020-10-15 16:18:06,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 16:18:06,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-10-15 16:18:06,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 16:18:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-10-15 16:18:06,723 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-10-15 16:18:06,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:06,723 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-10-15 16:18:06,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:06,723 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-10-15 16:18:06,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:06,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:06,724 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:06,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:06,924 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:06,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:06,925 INFO L82 PathProgramCache]: Analyzing trace with hash 575763989, now seen corresponding path program 139 times [2020-10-15 16:18:06,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:06,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709102245] [2020-10-15 16:18:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:07,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709102245] [2020-10-15 16:18:07,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955660638] [2020-10-15 16:18:07,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:07,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:07,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:07,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:07,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:07,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734373889] [2020-10-15 16:18:07,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:07,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:07,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:07,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:07,361 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-10-15 16:18:07,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:07,486 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-10-15 16:18:07,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:18:07,486 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:07,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:07,487 INFO L225 Difference]: With dead ends: 208 [2020-10-15 16:18:07,487 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 16:18:07,487 INFO L677 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 [2020-10-15 16:18:07,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 16:18:07,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-10-15 16:18:07,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:18:07,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-10-15 16:18:07,493 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-10-15 16:18:07,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:07,493 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-10-15 16:18:07,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:07,494 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-10-15 16:18:07,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:07,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:07,494 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:07,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:07,703 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:07,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:07,703 INFO L82 PathProgramCache]: Analyzing trace with hash 575764950, now seen corresponding path program 140 times [2020-10-15 16:18:07,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:07,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040212942] [2020-10-15 16:18:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:07,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040212942] [2020-10-15 16:18:07,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764296200] [2020-10-15 16:18:07,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:07,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:18:07,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:07,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:07,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:08,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:08,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:08,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063778993] [2020-10-15 16:18:08,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:08,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:08,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:08,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:08,108 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-10-15 16:18:08,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:08,421 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-10-15 16:18:08,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:18:08,421 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:08,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:08,422 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:18:08,422 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:18:08,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:18:08,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:18:08,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-10-15 16:18:08,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:18:08,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-15 16:18:08,426 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-15 16:18:08,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:08,426 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-15 16:18:08,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:08,426 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-15 16:18:08,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:08,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:08,426 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:08,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:08,627 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:08,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:08,628 INFO L82 PathProgramCache]: Analyzing trace with hash 575793780, now seen corresponding path program 141 times [2020-10-15 16:18:08,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:08,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000605638] [2020-10-15 16:18:08,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:08,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000605638] [2020-10-15 16:18:08,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931396444] [2020-10-15 16:18:08,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:08,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:18:08,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:08,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:08,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:09,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:09,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:09,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868001225] [2020-10-15 16:18:09,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:09,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:09,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:09,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:09,090 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-15 16:18:09,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:09,535 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-10-15 16:18:09,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:18:09,536 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:09,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:09,537 INFO L225 Difference]: With dead ends: 235 [2020-10-15 16:18:09,537 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:18:09,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:18:09,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:18:09,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-10-15 16:18:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 16:18:09,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-10-15 16:18:09,541 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-10-15 16:18:09,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:09,541 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-10-15 16:18:09,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:09,541 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-10-15 16:18:09,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:09,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:09,542 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:09,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:09,742 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:09,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:09,743 INFO L82 PathProgramCache]: Analyzing trace with hash 576687510, now seen corresponding path program 142 times [2020-10-15 16:18:09,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:09,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315845050] [2020-10-15 16:18:09,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:09,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315845050] [2020-10-15 16:18:09,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734609241] [2020-10-15 16:18:09,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:09,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:18:09,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:09,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:09,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:10,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:10,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:10,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533469881] [2020-10-15 16:18:10,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:10,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:10,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:10,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:10,149 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-10-15 16:18:10,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:10,649 INFO L93 Difference]: Finished difference Result 233 states and 544 transitions. [2020-10-15 16:18:10,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:18:10,650 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:10,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:10,651 INFO L225 Difference]: With dead ends: 233 [2020-10-15 16:18:10,651 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 16:18:10,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:18:10,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 16:18:10,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-10-15 16:18:10,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:18:10,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-15 16:18:10,656 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-15 16:18:10,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:10,656 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-15 16:18:10,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:10,656 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-15 16:18:10,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:10,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:10,657 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:10,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:10,865 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:10,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:10,866 INFO L82 PathProgramCache]: Analyzing trace with hash 576688471, now seen corresponding path program 143 times [2020-10-15 16:18:10,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:10,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131909820] [2020-10-15 16:18:10,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:10,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131909820] [2020-10-15 16:18:10,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544600971] [2020-10-15 16:18:10,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:11,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:18:11,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:11,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:11,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:14,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:14,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:14,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256274286] [2020-10-15 16:18:14,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:14,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:14,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:14,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:18:14,204 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-15 16:18:18,486 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:18:18,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:18,861 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-10-15 16:18:18,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:18:18,862 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:18,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:18,862 INFO L225 Difference]: With dead ends: 241 [2020-10-15 16:18:18,862 INFO L226 Difference]: Without dead ends: 239 [2020-10-15 16:18:18,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-10-15 16:18:18,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-15 16:18:18,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-15 16:18:18,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:18:18,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-10-15 16:18:18,865 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-10-15 16:18:18,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:18,865 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-10-15 16:18:18,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:18,865 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-10-15 16:18:18,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:18,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:18,866 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:19,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:19,067 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:19,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:19,067 INFO L82 PathProgramCache]: Analyzing trace with hash 576717301, now seen corresponding path program 144 times [2020-10-15 16:18:19,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:19,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896734531] [2020-10-15 16:18:19,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:19,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896734531] [2020-10-15 16:18:19,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933386559] [2020-10-15 16:18:19,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:19,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:18:19,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:19,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:19,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:19,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:19,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:19,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970518679] [2020-10-15 16:18:19,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:19,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:19,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:19,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:19,515 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-10-15 16:18:20,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:20,098 INFO L93 Difference]: Finished difference Result 233 states and 548 transitions. [2020-10-15 16:18:20,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:18:20,099 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:20,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:20,099 INFO L225 Difference]: With dead ends: 233 [2020-10-15 16:18:20,100 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 16:18:20,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:18:20,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 16:18:20,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2020-10-15 16:18:20,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:18:20,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-10-15 16:18:20,103 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-10-15 16:18:20,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:20,103 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-10-15 16:18:20,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:20,103 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-10-15 16:18:20,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:20,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:20,104 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:20,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-10-15 16:18:20,304 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:20,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:20,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1212993479, now seen corresponding path program 145 times [2020-10-15 16:18:20,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:20,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450333163] [2020-10-15 16:18:20,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:20,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450333163] [2020-10-15 16:18:20,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111187327] [2020-10-15 16:18:20,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:20,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:20,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:20,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:20,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:20,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126056431] [2020-10-15 16:18:20,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:20,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:20,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:20,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:20,714 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-10-15 16:18:20,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:20,892 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-10-15 16:18:20,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:18:20,893 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:20,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:20,894 INFO L225 Difference]: With dead ends: 204 [2020-10-15 16:18:20,894 INFO L226 Difference]: Without dead ends: 202 [2020-10-15 16:18:20,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:18:20,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-15 16:18:20,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-10-15 16:18:20,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:18:20,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-10-15 16:18:20,898 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-10-15 16:18:20,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:20,898 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-10-15 16:18:20,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:20,898 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-10-15 16:18:20,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:20,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:20,899 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:21,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:21,099 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:21,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:21,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1212994440, now seen corresponding path program 146 times [2020-10-15 16:18:21,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:21,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051357284] [2020-10-15 16:18:21,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:21,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051357284] [2020-10-15 16:18:21,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108397553] [2020-10-15 16:18:21,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:21,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:18:21,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:21,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:21,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:21,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:21,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:21,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844553356] [2020-10-15 16:18:21,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:21,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:21,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:21,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:21,475 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-10-15 16:18:21,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:21,870 INFO L93 Difference]: Finished difference Result 225 states and 527 transitions. [2020-10-15 16:18:21,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:18:21,871 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:21,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:21,871 INFO L225 Difference]: With dead ends: 225 [2020-10-15 16:18:21,871 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 16:18:21,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:18:21,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 16:18:21,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-10-15 16:18:21,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:18:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-10-15 16:18:21,875 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-10-15 16:18:21,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:21,875 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-10-15 16:18:21,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:21,875 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-10-15 16:18:21,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:21,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:21,876 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:22,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-15 16:18:22,076 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:22,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:22,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1213023270, now seen corresponding path program 147 times [2020-10-15 16:18:22,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:22,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600402896] [2020-10-15 16:18:22,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:22,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:22,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600402896] [2020-10-15 16:18:22,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543855549] [2020-10-15 16:18:22,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:22,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:18:22,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:22,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:22,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:22,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:22,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:22,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342498275] [2020-10-15 16:18:22,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:22,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:22,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:22,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:22,492 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-10-15 16:18:22,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:22,967 INFO L93 Difference]: Finished difference Result 231 states and 539 transitions. [2020-10-15 16:18:22,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:18:22,967 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:22,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:22,968 INFO L225 Difference]: With dead ends: 231 [2020-10-15 16:18:22,968 INFO L226 Difference]: Without dead ends: 229 [2020-10-15 16:18:22,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:18:22,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-15 16:18:22,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2020-10-15 16:18:22,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 16:18:22,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-10-15 16:18:22,972 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-10-15 16:18:22,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:22,972 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-10-15 16:18:22,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:22,972 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-10-15 16:18:22,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:22,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:22,973 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:23,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:23,174 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:23,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:23,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1233549269, now seen corresponding path program 148 times [2020-10-15 16:18:23,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:23,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193936888] [2020-10-15 16:18:23,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:23,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:23,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193936888] [2020-10-15 16:18:23,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039685982] [2020-10-15 16:18:23,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:23,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:18:23,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:23,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:23,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:23,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:23,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:23,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122181168] [2020-10-15 16:18:23,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:23,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:23,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:23,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:23,559 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-10-15 16:18:23,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:23,872 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-10-15 16:18:23,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:18:23,874 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:23,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:23,875 INFO L225 Difference]: With dead ends: 200 [2020-10-15 16:18:23,875 INFO L226 Difference]: Without dead ends: 198 [2020-10-15 16:18:23,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:18:23,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-15 16:18:23,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-10-15 16:18:23,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:18:23,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-10-15 16:18:23,881 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-10-15 16:18:23,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:23,881 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-10-15 16:18:23,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:23,882 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-10-15 16:18:23,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:23,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:23,882 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:24,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:24,083 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:24,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:24,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1233550230, now seen corresponding path program 149 times [2020-10-15 16:18:24,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:24,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849853752] [2020-10-15 16:18:24,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:24,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849853752] [2020-10-15 16:18:24,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462735214] [2020-10-15 16:18:24,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:24,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:18:24,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:24,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:24,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:24,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:24,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:24,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134085523] [2020-10-15 16:18:24,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:24,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:24,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:24,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:24,465 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-10-15 16:18:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:24,922 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-10-15 16:18:24,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:18:24,924 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:24,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:24,925 INFO L225 Difference]: With dead ends: 221 [2020-10-15 16:18:24,925 INFO L226 Difference]: Without dead ends: 219 [2020-10-15 16:18:24,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:18:24,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-15 16:18:24,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 162. [2020-10-15 16:18:24,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:18:24,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-10-15 16:18:24,928 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-10-15 16:18:24,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:24,928 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-10-15 16:18:24,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:24,929 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-10-15 16:18:24,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:24,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:24,929 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:25,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-10-15 16:18:25,138 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:25,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:25,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1234212359, now seen corresponding path program 150 times [2020-10-15 16:18:25,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:25,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875424386] [2020-10-15 16:18:25,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:25,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875424386] [2020-10-15 16:18:25,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050060771] [2020-10-15 16:18:25,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:25,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:18:25,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:25,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:18:25,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:25,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:25,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 16:18:25,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536870024] [2020-10-15 16:18:25,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:18:25,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:25,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:18:25,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:18:25,357 INFO L87 Difference]: Start difference. First operand 162 states and 405 transitions. Second operand 11 states. [2020-10-15 16:18:25,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:25,570 INFO L93 Difference]: Finished difference Result 201 states and 476 transitions. [2020-10-15 16:18:25,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:18:25,571 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 16:18:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:25,572 INFO L225 Difference]: With dead ends: 201 [2020-10-15 16:18:25,572 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 16:18:25,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:18:25,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 16:18:25,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-10-15 16:18:25,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:18:25,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 16:18:25,581 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 16:18:25,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:25,581 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 16:18:25,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:18:25,581 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 16:18:25,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:25,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:25,582 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:25,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:25,782 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:25,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:25,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1234234679, now seen corresponding path program 151 times [2020-10-15 16:18:25,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:25,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278451565] [2020-10-15 16:18:25,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:25,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278451565] [2020-10-15 16:18:25,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566682283] [2020-10-15 16:18:25,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:25,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:25,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:26,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:26,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:26,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:26,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628232396] [2020-10-15 16:18:26,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:26,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:26,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:26,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:26,187 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 16:18:26,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:26,723 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-10-15 16:18:26,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:18:26,723 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:26,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:26,724 INFO L225 Difference]: With dead ends: 226 [2020-10-15 16:18:26,724 INFO L226 Difference]: Without dead ends: 221 [2020-10-15 16:18:26,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:18:26,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-15 16:18:26,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 164. [2020-10-15 16:18:26,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:18:26,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-15 16:18:26,727 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-15 16:18:26,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:26,728 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-15 16:18:26,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:26,728 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-15 16:18:26,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:26,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:26,728 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:26,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:26,929 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:26,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:26,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1234242150, now seen corresponding path program 152 times [2020-10-15 16:18:26,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:26,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469147016] [2020-10-15 16:18:26,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:27,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469147016] [2020-10-15 16:18:27,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111651012] [2020-10-15 16:18:27,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:27,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:18:27,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:27,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:27,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:27,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:27,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:27,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786606754] [2020-10-15 16:18:27,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:27,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:27,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:27,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:27,316 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-15 16:18:27,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:27,787 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-15 16:18:27,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:18:27,788 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:27,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:27,788 INFO L225 Difference]: With dead ends: 218 [2020-10-15 16:18:27,788 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 16:18:27,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:18:27,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 16:18:27,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-10-15 16:18:27,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:18:27,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 16:18:27,792 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 16:18:27,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:27,792 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 16:18:27,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:27,792 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 16:18:27,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:27,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:27,793 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:27,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:27,994 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:27,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:27,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1234263509, now seen corresponding path program 153 times [2020-10-15 16:18:27,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:27,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432768316] [2020-10-15 16:18:27,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:28,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432768316] [2020-10-15 16:18:28,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957642543] [2020-10-15 16:18:28,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:28,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:18:28,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:28,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:28,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:28,316 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:18:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:28,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:28,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:28,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638332969] [2020-10-15 16:18:28,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:28,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:28,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:28,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:28,363 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 16:18:29,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:29,160 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-10-15 16:18:29,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:18:29,161 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:29,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:29,162 INFO L225 Difference]: With dead ends: 248 [2020-10-15 16:18:29,162 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 16:18:29,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:18:29,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 16:18:29,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-10-15 16:18:29,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:18:29,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 16:18:29,171 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 16:18:29,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:29,171 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 16:18:29,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:29,171 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 16:18:29,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:29,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:29,172 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:29,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:29,372 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:29,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:29,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1234264470, now seen corresponding path program 154 times [2020-10-15 16:18:29,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:29,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659283366] [2020-10-15 16:18:29,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:29,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659283366] [2020-10-15 16:18:29,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568115978] [2020-10-15 16:18:29,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:29,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:18:29,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:29,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:29,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:29,731 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:29,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:29,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:29,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545663221] [2020-10-15 16:18:29,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:29,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:29,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:29,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:29,759 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 16:18:30,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:30,342 INFO L93 Difference]: Finished difference Result 238 states and 567 transitions. [2020-10-15 16:18:30,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:18:30,343 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:30,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:30,344 INFO L225 Difference]: With dead ends: 238 [2020-10-15 16:18:30,344 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:18:30,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:18:30,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:18:30,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-15 16:18:30,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:18:30,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-15 16:18:30,347 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-15 16:18:30,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:30,347 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-15 16:18:30,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:30,347 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-15 16:18:30,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:30,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:30,348 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:30,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:30,548 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:30,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:30,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1234472790, now seen corresponding path program 155 times [2020-10-15 16:18:30,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:30,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975973088] [2020-10-15 16:18:30,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:30,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975973088] [2020-10-15 16:18:30,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286503333] [2020-10-15 16:18:30,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:30,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:18:30,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:30,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:30,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:30,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:30,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:30,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790745469] [2020-10-15 16:18:30,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:30,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:30,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:30,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:30,992 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-15 16:18:31,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:31,699 INFO L93 Difference]: Finished difference Result 235 states and 547 transitions. [2020-10-15 16:18:31,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:18:31,700 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:31,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:31,701 INFO L225 Difference]: With dead ends: 235 [2020-10-15 16:18:31,701 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:18:31,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:18:31,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:18:31,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-10-15 16:18:31,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:18:31,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-15 16:18:31,705 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-15 16:18:31,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:31,705 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-15 16:18:31,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:31,705 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-15 16:18:31,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:31,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:31,705 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:31,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:31,906 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:31,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:31,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1235135880, now seen corresponding path program 156 times [2020-10-15 16:18:31,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:31,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362691294] [2020-10-15 16:18:31,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:32,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362691294] [2020-10-15 16:18:32,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81985539] [2020-10-15 16:18:32,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:32,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:18:32,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:32,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:32,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:32,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:32,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:32,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:32,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354503398] [2020-10-15 16:18:32,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:32,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:32,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:32,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:32,330 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-15 16:18:33,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:33,017 INFO L93 Difference]: Finished difference Result 252 states and 594 transitions. [2020-10-15 16:18:33,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:18:33,018 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:33,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:33,018 INFO L225 Difference]: With dead ends: 252 [2020-10-15 16:18:33,019 INFO L226 Difference]: Without dead ends: 250 [2020-10-15 16:18:33,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:18:33,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-15 16:18:33,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2020-10-15 16:18:33,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:18:33,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 16:18:33,023 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 16:18:33,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:33,023 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 16:18:33,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:33,023 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 16:18:33,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:33,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:33,023 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:33,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-15 16:18:33,224 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:33,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:33,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1235157239, now seen corresponding path program 157 times [2020-10-15 16:18:33,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:33,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530305075] [2020-10-15 16:18:33,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:33,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:33,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530305075] [2020-10-15 16:18:33,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758714496] [2020-10-15 16:18:33,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:33,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:33,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:33,657 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:18:33,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:33,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:33,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:33,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124397461] [2020-10-15 16:18:33,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:33,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:33,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:33,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:33,713 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 16:18:34,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:34,762 INFO L93 Difference]: Finished difference Result 258 states and 617 transitions. [2020-10-15 16:18:34,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:18:34,763 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:34,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:34,763 INFO L225 Difference]: With dead ends: 258 [2020-10-15 16:18:34,763 INFO L226 Difference]: Without dead ends: 253 [2020-10-15 16:18:34,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:18:34,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-15 16:18:34,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-15 16:18:34,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:18:34,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 16:18:34,772 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 16:18:34,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:34,772 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 16:18:34,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:34,773 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 16:18:34,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:34,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:34,773 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:34,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-10-15 16:18:34,980 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:34,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:34,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1235158200, now seen corresponding path program 158 times [2020-10-15 16:18:34,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:34,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285534416] [2020-10-15 16:18:34,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:35,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285534416] [2020-10-15 16:18:35,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429616405] [2020-10-15 16:18:35,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:35,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:18:35,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:35,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:35,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:37,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:18:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:37,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:37,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:37,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934039246] [2020-10-15 16:18:37,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:37,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:37,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:37,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:18:37,444 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 16:18:41,765 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-15 16:18:46,043 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-15 16:18:47,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:47,590 INFO L93 Difference]: Finished difference Result 287 states and 685 transitions. [2020-10-15 16:18:47,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:18:47,591 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:47,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:47,591 INFO L225 Difference]: With dead ends: 287 [2020-10-15 16:18:47,591 INFO L226 Difference]: Without dead ends: 279 [2020-10-15 16:18:47,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=370, Invalid=819, Unknown=1, NotChecked=0, Total=1190 [2020-10-15 16:18:47,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-15 16:18:47,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 162. [2020-10-15 16:18:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:18:47,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 400 transitions. [2020-10-15 16:18:47,595 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 400 transitions. Word has length 14 [2020-10-15 16:18:47,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:47,596 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 400 transitions. [2020-10-15 16:18:47,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:47,596 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 400 transitions. [2020-10-15 16:18:47,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:47,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:47,596 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:47,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-10-15 16:18:47,805 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:47,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:47,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1235187030, now seen corresponding path program 159 times [2020-10-15 16:18:47,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:47,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244553776] [2020-10-15 16:18:47,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:47,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244553776] [2020-10-15 16:18:47,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974456958] [2020-10-15 16:18:47,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:47,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:18:47,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:47,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:47,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:48,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:18:48,228 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:49,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:49,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 16:18:49,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516785414] [2020-10-15 16:18:49,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:18:49,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:49,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:18:49,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=216, Unknown=1, NotChecked=0, Total=306 [2020-10-15 16:18:49,666 INFO L87 Difference]: Start difference. First operand 162 states and 400 transitions. Second operand 18 states. [2020-10-15 16:18:52,373 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-15 16:19:00,458 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 46 [2020-10-15 16:19:14,849 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-15 16:19:24,573 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-15 16:19:48,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:48,724 INFO L93 Difference]: Finished difference Result 283 states and 667 transitions. [2020-10-15 16:19:48,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:19:48,725 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 16:19:48,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:48,726 INFO L225 Difference]: With dead ends: 283 [2020-10-15 16:19:48,726 INFO L226 Difference]: Without dead ends: 278 [2020-10-15 16:19:48,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=391, Invalid=930, Unknown=11, NotChecked=0, Total=1332 [2020-10-15 16:19:48,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-15 16:19:48,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 160. [2020-10-15 16:19:48,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:19:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2020-10-15 16:19:48,729 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 14 [2020-10-15 16:19:48,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:48,730 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2020-10-15 16:19:48,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:19:48,730 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2020-10-15 16:19:48,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:48,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:48,730 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:48,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:48,931 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:48,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:48,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1241622630, now seen corresponding path program 160 times [2020-10-15 16:19:48,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:48,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428303732] [2020-10-15 16:19:48,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:49,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428303732] [2020-10-15 16:19:49,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726265821] [2020-10-15 16:19:49,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:49,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:19:49,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:49,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:49,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:49,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:49,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:49,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121464971] [2020-10-15 16:19:49,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:49,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:49,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:49,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:49,388 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 17 states. [2020-10-15 16:19:50,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:50,014 INFO L93 Difference]: Finished difference Result 235 states and 543 transitions. [2020-10-15 16:19:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:19:50,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:50,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:50,016 INFO L225 Difference]: With dead ends: 235 [2020-10-15 16:19:50,016 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:19:50,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:19:50,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:19:50,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-10-15 16:19:50,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:19:50,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 401 transitions. [2020-10-15 16:19:50,019 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 401 transitions. Word has length 14 [2020-10-15 16:19:50,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:50,019 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 401 transitions. [2020-10-15 16:19:50,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:50,019 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 401 transitions. [2020-10-15 16:19:50,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:50,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:50,020 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:50,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:50,221 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:50,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:50,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1241623591, now seen corresponding path program 161 times [2020-10-15 16:19:50,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:50,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653684387] [2020-10-15 16:19:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:50,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653684387] [2020-10-15 16:19:50,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222619913] [2020-10-15 16:19:50,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:50,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:19:50,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:50,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:50,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:56,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:56,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:56,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955871352] [2020-10-15 16:19:56,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:56,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:57,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:57,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:19:57,000 INFO L87 Difference]: Start difference. First operand 163 states and 401 transitions. Second operand 17 states. [2020-10-15 16:20:01,387 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:20:07,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:07,870 INFO L93 Difference]: Finished difference Result 241 states and 556 transitions. [2020-10-15 16:20:07,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:20:07,872 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:07,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:07,872 INFO L225 Difference]: With dead ends: 241 [2020-10-15 16:20:07,872 INFO L226 Difference]: Without dead ends: 239 [2020-10-15 16:20:07,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=193, Invalid=508, Unknown=1, NotChecked=0, Total=702 [2020-10-15 16:20:07,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-15 16:20:07,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-15 16:20:07,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:20:07,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 400 transitions. [2020-10-15 16:20:07,875 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 400 transitions. Word has length 14 [2020-10-15 16:20:07,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:07,876 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 400 transitions. [2020-10-15 16:20:07,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:07,876 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 400 transitions. [2020-10-15 16:20:07,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:07,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:07,876 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:08,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-10-15 16:20:08,077 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:08,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:08,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1241652421, now seen corresponding path program 162 times [2020-10-15 16:20:08,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:08,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871598002] [2020-10-15 16:20:08,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:08,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871598002] [2020-10-15 16:20:08,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604282941] [2020-10-15 16:20:08,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:08,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:20:08,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:08,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:08,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:08,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:08,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:08,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864024850] [2020-10-15 16:20:08,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:08,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:08,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:08,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:08,627 INFO L87 Difference]: Start difference. First operand 163 states and 400 transitions. Second operand 17 states. [2020-10-15 16:20:09,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:09,302 INFO L93 Difference]: Finished difference Result 235 states and 546 transitions. [2020-10-15 16:20:09,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:20:09,303 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:09,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:09,304 INFO L225 Difference]: With dead ends: 235 [2020-10-15 16:20:09,304 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:20:09,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:20:09,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:20:09,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-15 16:20:09,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:20:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-15 16:20:09,308 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-15 16:20:09,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:09,308 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-15 16:20:09,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:09,308 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-15 16:20:09,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:09,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:09,309 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:09,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:09,513 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:09,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:09,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1262178420, now seen corresponding path program 163 times [2020-10-15 16:20:09,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:09,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569257921] [2020-10-15 16:20:09,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:09,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:09,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569257921] [2020-10-15 16:20:09,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808712852] [2020-10-15 16:20:09,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:09,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:09,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:10,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:10,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:10,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122086038] [2020-10-15 16:20:10,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:10,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:10,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:10,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:10,023 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-15 16:20:10,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:10,979 INFO L93 Difference]: Finished difference Result 254 states and 587 transitions. [2020-10-15 16:20:10,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:20:10,980 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:10,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:10,980 INFO L225 Difference]: With dead ends: 254 [2020-10-15 16:20:10,981 INFO L226 Difference]: Without dead ends: 252 [2020-10-15 16:20:10,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:20:10,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-15 16:20:10,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 164. [2020-10-15 16:20:10,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:20:10,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 405 transitions. [2020-10-15 16:20:10,984 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 405 transitions. Word has length 14 [2020-10-15 16:20:10,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:10,985 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 405 transitions. [2020-10-15 16:20:10,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:10,985 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 405 transitions. [2020-10-15 16:20:10,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:10,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:10,985 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:11,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2020-10-15 16:20:11,186 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:11,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:11,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1262179381, now seen corresponding path program 164 times [2020-10-15 16:20:11,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:11,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660034481] [2020-10-15 16:20:11,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:11,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:11,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:11,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660034481] [2020-10-15 16:20:11,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810259649] [2020-10-15 16:20:11,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:11,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:20:11,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:11,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:11,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:13,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:13,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:13,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120564700] [2020-10-15 16:20:13,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:13,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:13,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:13,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:13,002 INFO L87 Difference]: Start difference. First operand 164 states and 405 transitions. Second operand 17 states. [2020-10-15 16:20:17,488 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:20:32,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:32,419 INFO L93 Difference]: Finished difference Result 264 states and 610 transitions. [2020-10-15 16:20:32,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:20:32,421 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:32,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:32,422 INFO L225 Difference]: With dead ends: 264 [2020-10-15 16:20:32,422 INFO L226 Difference]: Without dead ends: 262 [2020-10-15 16:20:32,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=289, Invalid=699, Unknown=4, NotChecked=0, Total=992 [2020-10-15 16:20:32,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-15 16:20:32,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 165. [2020-10-15 16:20:32,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:20:32,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-15 16:20:32,426 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-15 16:20:32,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:32,426 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-15 16:20:32,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:32,426 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-15 16:20:32,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:32,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:32,427 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:32,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:32,628 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:32,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:32,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1262841510, now seen corresponding path program 165 times [2020-10-15 16:20:32,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:32,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172784044] [2020-10-15 16:20:32,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:32,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172784044] [2020-10-15 16:20:32,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386794670] [2020-10-15 16:20:32,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:32,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:20:32,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:32,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:32,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:33,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:33,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:33,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995024610] [2020-10-15 16:20:33,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:33,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:33,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:33,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:33,140 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-15 16:20:34,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:34,041 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-10-15 16:20:34,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:20:34,042 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:34,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:34,043 INFO L225 Difference]: With dead ends: 255 [2020-10-15 16:20:34,043 INFO L226 Difference]: Without dead ends: 253 [2020-10-15 16:20:34,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:20:34,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-15 16:20:34,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-15 16:20:34,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:20:34,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 16:20:34,046 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 16:20:34,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:34,046 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 16:20:34,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:34,046 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 16:20:34,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:34,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:34,046 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:34,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:34,247 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:34,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:34,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1262862869, now seen corresponding path program 166 times [2020-10-15 16:20:34,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:34,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916672420] [2020-10-15 16:20:34,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:34,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916672420] [2020-10-15 16:20:34,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080140924] [2020-10-15 16:20:34,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:34,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:20:34,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:34,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:34,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:34,721 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:20:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:34,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:34,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:34,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983595769] [2020-10-15 16:20:34,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:34,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:34,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:34,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:34,790 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 16:20:36,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:36,004 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2020-10-15 16:20:36,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:20:36,005 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:36,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:36,006 INFO L225 Difference]: With dead ends: 256 [2020-10-15 16:20:36,006 INFO L226 Difference]: Without dead ends: 251 [2020-10-15 16:20:36,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:20:36,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-15 16:20:36,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 167. [2020-10-15 16:20:36,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:20:36,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 16:20:36,010 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 16:20:36,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:36,010 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 16:20:36,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:36,010 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 16:20:36,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:36,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:36,010 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:36,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-15 16:20:36,211 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:36,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:36,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1262863830, now seen corresponding path program 167 times [2020-10-15 16:20:36,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:36,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178290805] [2020-10-15 16:20:36,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:36,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178290805] [2020-10-15 16:20:36,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799362529] [2020-10-15 16:20:36,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:36,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:20:36,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:36,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:36,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:36,741 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:20:36,755 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:20:36,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:20:40,948 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 27 [2020-10-15 16:20:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:40,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:40,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 16:20:40,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544686103] [2020-10-15 16:20:40,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:20:40,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:40,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:20:40,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=216, Unknown=1, NotChecked=0, Total=306 [2020-10-15 16:20:40,951 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 18 states. [2020-10-15 16:20:46,049 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-15 16:20:48,247 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 42 [2020-10-15 16:20:54,714 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2020-10-15 16:21:04,958 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-15 16:21:25,720 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-10-15 16:21:58,744 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-10-15 16:22:29,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:29,100 INFO L93 Difference]: Finished difference Result 311 states and 731 transitions. [2020-10-15 16:22:29,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 16:22:29,102 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 16:22:29,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:29,103 INFO L225 Difference]: With dead ends: 311 [2020-10-15 16:22:29,103 INFO L226 Difference]: Without dead ends: 306 [2020-10-15 16:22:29,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 53.3s TimeCoverageRelationStatistics Valid=499, Invalid=1207, Unknown=16, NotChecked=0, Total=1722 [2020-10-15 16:22:29,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-15 16:22:29,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 165. [2020-10-15 16:22:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:22:29,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-15 16:22:29,107 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-15 16:22:29,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:29,107 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-15 16:22:29,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:22:29,107 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-15 16:22:29,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:29,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:29,107 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:29,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-15 16:22:29,308 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:29,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:29,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1262871301, now seen corresponding path program 168 times [2020-10-15 16:22:29,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:29,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965551514] [2020-10-15 16:22:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:29,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965551514] [2020-10-15 16:22:29,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056043361] [2020-10-15 16:22:29,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:29,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:22:29,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:29,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:29,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:32,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:32,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:32,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810877847] [2020-10-15 16:22:32,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:32,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:32,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:32,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:22:32,043 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-15 16:22:36,534 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 16:22:40,816 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:22:41,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:41,655 INFO L93 Difference]: Finished difference Result 271 states and 639 transitions. [2020-10-15 16:22:41,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:22:41,656 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:41,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:41,657 INFO L225 Difference]: With dead ends: 271 [2020-10-15 16:22:41,657 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 16:22:41,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=348, Invalid=841, Unknown=1, NotChecked=0, Total=1190 [2020-10-15 16:22:41,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 16:22:41,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 167. [2020-10-15 16:22:41,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:22:41,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 16:22:41,663 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 16:22:41,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:41,663 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 16:22:41,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:41,663 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 16:22:41,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:41,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:41,664 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:41,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-15 16:22:41,870 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:41,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:41,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1262892660, now seen corresponding path program 169 times [2020-10-15 16:22:41,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:41,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342000788] [2020-10-15 16:22:41,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:41,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:42,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342000788] [2020-10-15 16:22:42,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874321870] [2020-10-15 16:22:42,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:42,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:42,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:46,016 WARN L860 $PredicateComparison]: unable to prove that (exists ((aux_div_aux_mod_v_~j~0_554_43_92 Int) (v_~i~0_554 Int) (aux_div_v_~j~0_554_43 Int)) (let ((.cse0 (* 2 aux_div_aux_mod_v_~j~0_554_43_92)) (.cse1 (* 2 aux_div_v_~j~0_554_43))) (and (<= aux_div_v_~j~0_554_43 1) (<= v_~i~0_554 (+ .cse0 .cse1 3)) (<= c_~j~0 (+ .cse0 v_~i~0_554 2)) (<= (+ .cse0 .cse1 1) v_~i~0_554) (<= aux_div_aux_mod_v_~j~0_554_43_92 1) (<= c_~i~0 (+ v_~i~0_554 c_~j~0)) (<= (+ .cse1 c_~j~0) (* 2 v_~i~0_554))))) is different from true [2020-10-15 16:22:46,020 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:22:46,022 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:22:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:46,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:46,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:46,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349728910] [2020-10-15 16:22:46,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:46,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:46,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:46,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=162, Unknown=2, NotChecked=28, Total=272 [2020-10-15 16:22:46,094 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 16:22:46,555 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-15 16:22:50,716 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 16:22:59,230 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-15 16:23:15,095 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-15 16:23:17,713 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-10-15 16:23:27,956 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-10-15 16:23:42,335 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2020-10-15 16:23:42,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:42,639 INFO L93 Difference]: Finished difference Result 292 states and 717 transitions. [2020-10-15 16:23:42,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:23:42,641 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:42,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:42,642 INFO L225 Difference]: With dead ends: 292 [2020-10-15 16:23:42,642 INFO L226 Difference]: Without dead ends: 287 [2020-10-15 16:23:42,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 57.9s TimeCoverageRelationStatistics Valid=482, Invalid=1066, Unknown=16, NotChecked=76, Total=1640 [2020-10-15 16:23:42,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-15 16:23:42,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 168. [2020-10-15 16:23:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-15 16:23:42,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 421 transitions. [2020-10-15 16:23:42,646 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 421 transitions. Word has length 14 [2020-10-15 16:23:42,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:42,646 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 421 transitions. [2020-10-15 16:23:42,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:42,646 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 421 transitions. [2020-10-15 16:23:42,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:42,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:42,647 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:42,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-10-15 16:23:42,848 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:42,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:42,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1262893621, now seen corresponding path program 170 times [2020-10-15 16:23:42,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:42,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720465069] [2020-10-15 16:23:42,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:43,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720465069] [2020-10-15 16:23:43,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073713938] [2020-10-15 16:23:43,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:43,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:23:43,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:43,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:43,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:45,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:23:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:45,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:45,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:45,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461696563] [2020-10-15 16:23:45,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:45,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:45,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:45,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:23:45,506 INFO L87 Difference]: Start difference. First operand 168 states and 421 transitions. Second operand 17 states. [2020-10-15 16:23:47,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:47,911 INFO L93 Difference]: Finished difference Result 292 states and 701 transitions. [2020-10-15 16:23:47,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:23:47,913 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:47,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:47,914 INFO L225 Difference]: With dead ends: 292 [2020-10-15 16:23:47,914 INFO L226 Difference]: Without dead ends: 284 [2020-10-15 16:23:47,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=425, Invalid=980, Unknown=1, NotChecked=0, Total=1406 [2020-10-15 16:23:47,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-15 16:23:47,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 162. [2020-10-15 16:23:47,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:23:47,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-15 16:23:47,918 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-15 16:23:47,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:47,918 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-15 16:23:47,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:47,918 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-15 16:23:47,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:47,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:47,919 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:48,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-15 16:23:48,120 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:48,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:48,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1263101941, now seen corresponding path program 171 times [2020-10-15 16:23:48,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:48,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751974327] [2020-10-15 16:23:48,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:48,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:48,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751974327] [2020-10-15 16:23:48,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992649436] [2020-10-15 16:23:48,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:48,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:23:48,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:48,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:48,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:48,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:48,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:48,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767071542] [2020-10-15 16:23:48,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:48,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:48,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:48,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:48,881 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-15 16:23:49,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:49,704 INFO L93 Difference]: Finished difference Result 231 states and 545 transitions. [2020-10-15 16:23:49,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:23:49,707 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:49,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:49,708 INFO L225 Difference]: With dead ends: 231 [2020-10-15 16:23:49,708 INFO L226 Difference]: Without dead ends: 229 [2020-10-15 16:23:49,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:23:49,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-15 16:23:49,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2020-10-15 16:23:49,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:23:49,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-15 16:23:49,712 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-15 16:23:49,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:49,712 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-15 16:23:49,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:49,713 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-15 16:23:49,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:49,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:49,713 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:49,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2020-10-15 16:23:49,914 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:49,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:49,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1263765031, now seen corresponding path program 172 times [2020-10-15 16:23:49,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:49,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335432226] [2020-10-15 16:23:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:50,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335432226] [2020-10-15 16:23:50,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086369757] [2020-10-15 16:23:50,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:50,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:23:50,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:50,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:50,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:50,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:50,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:50,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018635078] [2020-10-15 16:23:50,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:50,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:50,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:50,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:50,566 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-15 16:23:51,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:51,912 INFO L93 Difference]: Finished difference Result 250 states and 594 transitions. [2020-10-15 16:23:51,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:23:51,914 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:51,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:51,915 INFO L225 Difference]: With dead ends: 250 [2020-10-15 16:23:51,915 INFO L226 Difference]: Without dead ends: 248 [2020-10-15 16:23:51,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:23:51,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-15 16:23:51,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 163. [2020-10-15 16:23:51,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:23:51,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 405 transitions. [2020-10-15 16:23:51,919 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 405 transitions. Word has length 14 [2020-10-15 16:23:51,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:51,920 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 405 transitions. [2020-10-15 16:23:51,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:51,920 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 405 transitions. [2020-10-15 16:23:51,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:51,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:51,920 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:52,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:52,121 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:52,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:52,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1263787351, now seen corresponding path program 173 times [2020-10-15 16:23:52,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:52,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128034606] [2020-10-15 16:23:52,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:52,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128034606] [2020-10-15 16:23:52,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275673131] [2020-10-15 16:23:52,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:52,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:23:52,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:52,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:52,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:52,794 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:23:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:52,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:52,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:52,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22851969] [2020-10-15 16:23:52,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:52,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:52,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:52,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:52,839 INFO L87 Difference]: Start difference. First operand 163 states and 405 transitions. Second operand 17 states. [2020-10-15 16:23:54,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:54,952 INFO L93 Difference]: Finished difference Result 288 states and 686 transitions. [2020-10-15 16:23:54,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:23:54,953 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:54,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:54,953 INFO L225 Difference]: With dead ends: 288 [2020-10-15 16:23:54,953 INFO L226 Difference]: Without dead ends: 283 [2020-10-15 16:23:54,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:23:54,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-15 16:23:54,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 159. [2020-10-15 16:23:54,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 16:23:54,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 388 transitions. [2020-10-15 16:23:54,957 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 388 transitions. Word has length 14 [2020-10-15 16:23:54,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:54,957 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 388 transitions. [2020-10-15 16:23:54,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:54,957 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 388 transitions. [2020-10-15 16:23:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:54,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:54,957 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:55,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-10-15 16:23:55,158 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:55,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:55,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1463267670, now seen corresponding path program 174 times [2020-10-15 16:23:55,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:55,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768967412] [2020-10-15 16:23:55,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:55,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768967412] [2020-10-15 16:23:55,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435456742] [2020-10-15 16:23:55,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:55,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:23:55,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:55,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:55,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:55,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:55,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:55,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013829963] [2020-10-15 16:23:55,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:55,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:55,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:55,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:55,765 INFO L87 Difference]: Start difference. First operand 159 states and 388 transitions. Second operand 17 states. [2020-10-15 16:23:56,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:56,534 INFO L93 Difference]: Finished difference Result 236 states and 544 transitions. [2020-10-15 16:23:56,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:23:56,537 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:56,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:56,537 INFO L225 Difference]: With dead ends: 236 [2020-10-15 16:23:56,537 INFO L226 Difference]: Without dead ends: 234 [2020-10-15 16:23:56,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:23:56,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-15 16:23:56,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-10-15 16:23:56,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:23:56,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 16:23:56,541 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 16:23:56,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:56,542 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 16:23:56,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:56,542 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 16:23:56,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:56,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:56,543 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:56,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:56,754 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:56,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:56,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1463268631, now seen corresponding path program 175 times [2020-10-15 16:23:56,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:56,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29253322] [2020-10-15 16:23:56,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:56,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:56,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29253322] [2020-10-15 16:23:56,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539131591] [2020-10-15 16:23:56,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:56,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:56,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:57,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:57,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:57,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202787122] [2020-10-15 16:23:57,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:57,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:57,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:57,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:57,402 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 16:23:58,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:58,290 INFO L93 Difference]: Finished difference Result 246 states and 565 transitions. [2020-10-15 16:23:58,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:23:58,293 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:58,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:58,293 INFO L225 Difference]: With dead ends: 246 [2020-10-15 16:23:58,293 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 16:23:58,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:23:58,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 16:23:58,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 163. [2020-10-15 16:23:58,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:23:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 16:23:58,297 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 16:23:58,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:58,297 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 16:23:58,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:58,297 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 16:23:58,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:58,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:58,297 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:58,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:58,498 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:58,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:58,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1463297461, now seen corresponding path program 176 times [2020-10-15 16:23:58,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:58,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118990869] [2020-10-15 16:23:58,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:58,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118990869] [2020-10-15 16:23:58,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303349960] [2020-10-15 16:23:58,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:58,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:23:58,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:58,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:58,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:59,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:59,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:59,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559107677] [2020-10-15 16:23:59,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:59,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:59,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:59,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:59,148 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 16:23:59,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:59,932 INFO L93 Difference]: Finished difference Result 239 states and 554 transitions. [2020-10-15 16:23:59,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:23:59,935 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:59,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:59,936 INFO L225 Difference]: With dead ends: 239 [2020-10-15 16:23:59,936 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 16:23:59,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:23:59,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 16:23:59,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-15 16:23:59,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:23:59,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 16:23:59,939 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 16:23:59,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:59,939 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 16:23:59,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:59,939 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 16:23:59,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:59,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:59,940 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:00,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:00,141 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:00,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:00,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1464221943, now seen corresponding path program 177 times [2020-10-15 16:24:00,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:00,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070740157] [2020-10-15 16:24:00,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:00,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070740157] [2020-10-15 16:24:00,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437701224] [2020-10-15 16:24:00,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:00,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:24:00,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:00,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:00,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:00,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:00,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:00,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300578881] [2020-10-15 16:24:00,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:00,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:00,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:00,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:00,759 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 16:24:01,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:01,415 INFO L93 Difference]: Finished difference Result 229 states and 529 transitions. [2020-10-15 16:24:01,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:24:01,417 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:01,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:01,418 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:24:01,418 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:24:01,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:24:01,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:24:01,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-15 16:24:01,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 16:24:01,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-15 16:24:01,421 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-15 16:24:01,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:01,422 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-15 16:24:01,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:01,422 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-15 16:24:01,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:01,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:01,422 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:01,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-15 16:24:01,623 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:01,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:01,624 INFO L82 PathProgramCache]: Analyzing trace with hash 2100497160, now seen corresponding path program 178 times [2020-10-15 16:24:01,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:01,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223266052] [2020-10-15 16:24:01,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:01,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223266052] [2020-10-15 16:24:01,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28105991] [2020-10-15 16:24:01,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:01,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:24:01,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:01,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:01,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:02,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:02,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:02,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279626738] [2020-10-15 16:24:02,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:02,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:02,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:02,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:02,205 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-15 16:24:03,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:03,604 INFO L93 Difference]: Finished difference Result 261 states and 599 transitions. [2020-10-15 16:24:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:24:03,607 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:03,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:03,608 INFO L225 Difference]: With dead ends: 261 [2020-10-15 16:24:03,608 INFO L226 Difference]: Without dead ends: 259 [2020-10-15 16:24:03,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:24:03,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-15 16:24:03,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 164. [2020-10-15 16:24:03,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:24:03,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 406 transitions. [2020-10-15 16:24:03,611 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 406 transitions. Word has length 14 [2020-10-15 16:24:03,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:03,611 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 406 transitions. [2020-10-15 16:24:03,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:03,611 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 406 transitions. [2020-10-15 16:24:03,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:03,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:03,612 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:03,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:03,813 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:03,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:03,813 INFO L82 PathProgramCache]: Analyzing trace with hash 2100498121, now seen corresponding path program 179 times [2020-10-15 16:24:03,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:03,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935573944] [2020-10-15 16:24:03,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:04,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935573944] [2020-10-15 16:24:04,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261367397] [2020-10-15 16:24:04,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:04,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:24:04,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:04,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:04,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:04,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:04,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:04,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831291345] [2020-10-15 16:24:04,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:04,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:04,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:04,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:04,458 INFO L87 Difference]: Start difference. First operand 164 states and 406 transitions. Second operand 17 states. [2020-10-15 16:24:05,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:05,858 INFO L93 Difference]: Finished difference Result 271 states and 622 transitions. [2020-10-15 16:24:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:24:05,861 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:05,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:05,862 INFO L225 Difference]: With dead ends: 271 [2020-10-15 16:24:05,862 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 16:24:05,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:24:05,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 16:24:05,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2020-10-15 16:24:05,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:24:05,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2020-10-15 16:24:05,867 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 14 [2020-10-15 16:24:05,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:05,867 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 413 transitions. [2020-10-15 16:24:05,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:05,867 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 413 transitions. [2020-10-15 16:24:05,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:05,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:05,873 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:06,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-15 16:24:06,074 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:06,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:06,074 INFO L82 PathProgramCache]: Analyzing trace with hash 2100526951, now seen corresponding path program 180 times [2020-10-15 16:24:06,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:06,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792219079] [2020-10-15 16:24:06,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:06,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:06,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792219079] [2020-10-15 16:24:06,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065654089] [2020-10-15 16:24:06,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:06,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:24:06,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:06,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:06,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:06,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:06,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:06,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514826146] [2020-10-15 16:24:06,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:06,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:06,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:06,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:06,590 INFO L87 Difference]: Start difference. First operand 166 states and 413 transitions. Second operand 17 states. [2020-10-15 16:24:07,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:07,666 INFO L93 Difference]: Finished difference Result 253 states and 588 transitions. [2020-10-15 16:24:07,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:24:07,668 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:07,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:07,669 INFO L225 Difference]: With dead ends: 253 [2020-10-15 16:24:07,669 INFO L226 Difference]: Without dead ends: 251 [2020-10-15 16:24:07,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=274, Invalid=718, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:24:07,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-15 16:24:07,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2020-10-15 16:24:07,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:24:07,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-15 16:24:07,672 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-15 16:24:07,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:07,672 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-15 16:24:07,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:07,672 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-15 16:24:07,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:07,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:07,673 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:07,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-15 16:24:07,874 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:07,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:07,874 INFO L82 PathProgramCache]: Analyzing trace with hash 2121052950, now seen corresponding path program 181 times [2020-10-15 16:24:07,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:07,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967487724] [2020-10-15 16:24:07,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:08,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967487724] [2020-10-15 16:24:08,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298118719] [2020-10-15 16:24:08,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:08,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:08,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:08,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:08,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:08,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670927948] [2020-10-15 16:24:08,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:08,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:08,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:08,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:08,471 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-15 16:24:10,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:10,020 INFO L93 Difference]: Finished difference Result 268 states and 622 transitions. [2020-10-15 16:24:10,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:24:10,022 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:10,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:10,023 INFO L225 Difference]: With dead ends: 268 [2020-10-15 16:24:10,023 INFO L226 Difference]: Without dead ends: 266 [2020-10-15 16:24:10,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:24:10,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-15 16:24:10,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 167. [2020-10-15 16:24:10,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:24:10,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 16:24:10,027 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 16:24:10,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:10,027 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 16:24:10,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:10,027 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 16:24:10,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:10,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:10,027 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:10,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:10,228 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:10,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:10,229 INFO L82 PathProgramCache]: Analyzing trace with hash 2121053911, now seen corresponding path program 182 times [2020-10-15 16:24:10,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:10,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353304923] [2020-10-15 16:24:10,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:10,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353304923] [2020-10-15 16:24:10,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168578335] [2020-10-15 16:24:10,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:10,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:24:10,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:10,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:10,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:10,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:10,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:10,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322907620] [2020-10-15 16:24:10,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:10,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:10,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:10,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:10,886 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 16:24:12,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:12,338 INFO L93 Difference]: Finished difference Result 271 states and 630 transitions. [2020-10-15 16:24:12,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:24:12,340 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:12,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:12,341 INFO L225 Difference]: With dead ends: 271 [2020-10-15 16:24:12,341 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 16:24:12,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:24:12,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 16:24:12,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-15 16:24:12,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:24:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-15 16:24:12,344 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-15 16:24:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:12,344 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-15 16:24:12,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:12,344 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-15 16:24:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:12,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:12,345 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:12,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-15 16:24:12,546 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:12,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:12,546 INFO L82 PathProgramCache]: Analyzing trace with hash 2121716040, now seen corresponding path program 183 times [2020-10-15 16:24:12,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:12,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766674548] [2020-10-15 16:24:12,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:12,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:12,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766674548] [2020-10-15 16:24:12,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963694438] [2020-10-15 16:24:12,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:12,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:24:12,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:12,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:12,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:13,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:13,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:13,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277110521] [2020-10-15 16:24:13,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:13,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:13,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:13,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:13,124 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-10-15 16:24:14,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:14,512 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2020-10-15 16:24:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:24:14,513 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:14,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:14,514 INFO L225 Difference]: With dead ends: 262 [2020-10-15 16:24:14,514 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 16:24:14,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=408, Invalid=924, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:24:14,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 16:24:14,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 171. [2020-10-15 16:24:14,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 16:24:14,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 16:24:14,519 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 16:24:14,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:14,519 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 16:24:14,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:14,519 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 16:24:14,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:14,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:14,519 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:14,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2020-10-15 16:24:14,720 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:14,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:14,721 INFO L82 PathProgramCache]: Analyzing trace with hash 2121737399, now seen corresponding path program 184 times [2020-10-15 16:24:14,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:14,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453152932] [2020-10-15 16:24:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:14,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453152932] [2020-10-15 16:24:14,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655084629] [2020-10-15 16:24:14,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:14,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:24:14,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:14,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:14,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:15,262 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:24:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:15,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:15,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:15,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962417783] [2020-10-15 16:24:15,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:15,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:15,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:15,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:15,290 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 16:24:16,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:16,795 INFO L93 Difference]: Finished difference Result 248 states and 600 transitions. [2020-10-15 16:24:16,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:24:16,798 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:16,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:16,799 INFO L225 Difference]: With dead ends: 248 [2020-10-15 16:24:16,799 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 16:24:16,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:24:16,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 16:24:16,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2020-10-15 16:24:16,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 16:24:16,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 16:24:16,802 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 16:24:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:16,803 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 16:24:16,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:16,803 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 16:24:16,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:16,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:16,803 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:17,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:17,004 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:17,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:17,005 INFO L82 PathProgramCache]: Analyzing trace with hash 2121738360, now seen corresponding path program 185 times [2020-10-15 16:24:17,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:17,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510922261] [2020-10-15 16:24:17,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:17,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510922261] [2020-10-15 16:24:17,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918606771] [2020-10-15 16:24:17,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:17,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:24:17,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:17,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:17,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:17,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:24:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:17,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:17,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:17,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600105159] [2020-10-15 16:24:17,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:17,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:17,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:17,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:17,592 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 16:24:19,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:19,449 INFO L93 Difference]: Finished difference Result 287 states and 694 transitions. [2020-10-15 16:24:19,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:24:19,452 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:19,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:19,452 INFO L225 Difference]: With dead ends: 287 [2020-10-15 16:24:19,452 INFO L226 Difference]: Without dead ends: 282 [2020-10-15 16:24:19,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:24:19,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-15 16:24:19,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 169. [2020-10-15 16:24:19,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:24:19,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-15 16:24:19,461 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-15 16:24:19,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:19,461 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-15 16:24:19,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:19,461 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-15 16:24:19,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:19,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:19,461 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:19,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:19,662 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:19,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:19,663 INFO L82 PathProgramCache]: Analyzing trace with hash 2121745831, now seen corresponding path program 186 times [2020-10-15 16:24:19,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:19,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39878557] [2020-10-15 16:24:19,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:19,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39878557] [2020-10-15 16:24:19,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859991908] [2020-10-15 16:24:19,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:19,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:24:19,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:19,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:19,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:20,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:20,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:20,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378886810] [2020-10-15 16:24:20,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:20,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:20,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:20,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:20,534 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-10-15 16:24:23,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:23,158 INFO L93 Difference]: Finished difference Result 284 states and 678 transitions. [2020-10-15 16:24:23,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:24:23,161 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:23,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:23,162 INFO L225 Difference]: With dead ends: 284 [2020-10-15 16:24:23,162 INFO L226 Difference]: Without dead ends: 282 [2020-10-15 16:24:23,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:24:23,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-15 16:24:23,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 171. [2020-10-15 16:24:23,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 16:24:23,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 16:24:23,166 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 16:24:23,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:23,167 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 16:24:23,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:23,167 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 16:24:23,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:23,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:23,167 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:23,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:23,377 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:23,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:23,378 INFO L82 PathProgramCache]: Analyzing trace with hash 2121767190, now seen corresponding path program 187 times [2020-10-15 16:24:23,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:23,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075547442] [2020-10-15 16:24:23,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:23,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075547442] [2020-10-15 16:24:23,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855139555] [2020-10-15 16:24:23,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:23,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:23,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:23,993 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:24:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:24,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:24,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:24,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633543990] [2020-10-15 16:24:24,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:24,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:24,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:24,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:24,074 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 16:24:25,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:25,942 INFO L93 Difference]: Finished difference Result 289 states and 702 transitions. [2020-10-15 16:24:25,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:24:25,946 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:25,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:25,947 INFO L225 Difference]: With dead ends: 289 [2020-10-15 16:24:25,947 INFO L226 Difference]: Without dead ends: 284 [2020-10-15 16:24:25,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:24:25,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-15 16:24:25,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 172. [2020-10-15 16:24:25,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-15 16:24:25,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2020-10-15 16:24:25,951 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 14 [2020-10-15 16:24:25,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:25,952 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2020-10-15 16:24:25,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:25,952 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2020-10-15 16:24:25,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:25,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:25,952 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:26,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:26,153 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:26,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:26,154 INFO L82 PathProgramCache]: Analyzing trace with hash 2121768151, now seen corresponding path program 188 times [2020-10-15 16:24:26,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:26,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382547808] [2020-10-15 16:24:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:26,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382547808] [2020-10-15 16:24:26,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537836186] [2020-10-15 16:24:26,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:26,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:24:26,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:26,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:26,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:26,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:24:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:26,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:26,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:26,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725186764] [2020-10-15 16:24:26,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:26,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:26,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:26,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:26,676 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand 17 states. [2020-10-15 16:24:29,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:29,018 INFO L93 Difference]: Finished difference Result 312 states and 753 transitions. [2020-10-15 16:24:29,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:24:29,019 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:29,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:29,020 INFO L225 Difference]: With dead ends: 312 [2020-10-15 16:24:29,020 INFO L226 Difference]: Without dead ends: 304 [2020-10-15 16:24:29,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:24:29,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-15 16:24:29,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 165. [2020-10-15 16:24:29,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:24:29,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-15 16:24:29,024 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-15 16:24:29,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:29,024 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-15 16:24:29,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:29,024 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-15 16:24:29,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:29,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:29,025 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:29,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:29,225 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:29,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:29,226 INFO L82 PathProgramCache]: Analyzing trace with hash 2121976471, now seen corresponding path program 189 times [2020-10-15 16:24:29,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:29,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047290131] [2020-10-15 16:24:29,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:29,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:29,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047290131] [2020-10-15 16:24:29,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250399936] [2020-10-15 16:24:29,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:29,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:24:29,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:29,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:29,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:29,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:29,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:29,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509625588] [2020-10-15 16:24:29,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:29,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:29,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:29,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:29,867 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-15 16:24:31,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:31,130 INFO L93 Difference]: Finished difference Result 262 states and 617 transitions. [2020-10-15 16:24:31,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:24:31,131 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:31,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:31,132 INFO L225 Difference]: With dead ends: 262 [2020-10-15 16:24:31,132 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 16:24:31,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:24:31,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 16:24:31,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 167. [2020-10-15 16:24:31,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:24:31,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 16:24:31,135 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 16:24:31,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:31,136 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 16:24:31,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:31,136 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 16:24:31,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:31,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:31,137 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:31,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-15 16:24:31,347 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:31,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:31,347 INFO L82 PathProgramCache]: Analyzing trace with hash 2122639561, now seen corresponding path program 190 times [2020-10-15 16:24:31,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:31,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729119066] [2020-10-15 16:24:31,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:31,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729119066] [2020-10-15 16:24:31,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849021186] [2020-10-15 16:24:31,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:31,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:24:31,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:31,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:31,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:31,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:31,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:31,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899688508] [2020-10-15 16:24:31,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:31,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:31,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:31,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:31,967 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 16:24:33,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:33,529 INFO L93 Difference]: Finished difference Result 271 states and 650 transitions. [2020-10-15 16:24:33,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:24:33,532 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:33,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:33,533 INFO L225 Difference]: With dead ends: 271 [2020-10-15 16:24:33,533 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 16:24:33,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=396, Invalid=936, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:24:33,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 16:24:33,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-15 16:24:33,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:24:33,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 16:24:33,538 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 16:24:33,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:33,538 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 16:24:33,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:33,538 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 16:24:33,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:33,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:33,538 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:33,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-15 16:24:33,739 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:33,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:33,740 INFO L82 PathProgramCache]: Analyzing trace with hash 2122660920, now seen corresponding path program 191 times [2020-10-15 16:24:33,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:33,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213473529] [2020-10-15 16:24:33,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:33,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213473529] [2020-10-15 16:24:33,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024385277] [2020-10-15 16:24:33,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:34,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:24:34,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:34,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:34,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:34,320 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:24:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:34,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:34,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:34,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242359124] [2020-10-15 16:24:34,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:34,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:34,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:34,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:34,348 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 16:24:36,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:36,093 INFO L93 Difference]: Finished difference Result 296 states and 714 transitions. [2020-10-15 16:24:36,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:24:36,096 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:36,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:36,097 INFO L225 Difference]: With dead ends: 296 [2020-10-15 16:24:36,097 INFO L226 Difference]: Without dead ends: 288 [2020-10-15 16:24:36,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:24:36,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-15 16:24:36,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 171. [2020-10-15 16:24:36,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 16:24:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-10-15 16:24:36,100 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-10-15 16:24:36,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:36,100 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-10-15 16:24:36,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:36,101 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-10-15 16:24:36,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:36,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:36,101 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:36,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-10-15 16:24:36,302 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:36,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:36,302 INFO L82 PathProgramCache]: Analyzing trace with hash 2122661881, now seen corresponding path program 192 times [2020-10-15 16:24:36,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:36,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163425330] [2020-10-15 16:24:36,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:36,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163425330] [2020-10-15 16:24:36,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30245527] [2020-10-15 16:24:36,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:36,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:24:36,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:36,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:36,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:36,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:24:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:36,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:36,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:36,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215778376] [2020-10-15 16:24:36,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:36,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:36,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:36,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:36,961 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-10-15 16:24:39,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:39,078 INFO L93 Difference]: Finished difference Result 298 states and 732 transitions. [2020-10-15 16:24:39,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:24:39,081 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:39,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:39,082 INFO L225 Difference]: With dead ends: 298 [2020-10-15 16:24:39,082 INFO L226 Difference]: Without dead ends: 290 [2020-10-15 16:24:39,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:24:39,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-15 16:24:39,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-10-15 16:24:39,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:24:39,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 429 transitions. [2020-10-15 16:24:39,086 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 429 transitions. Word has length 14 [2020-10-15 16:24:39,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:39,086 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 429 transitions. [2020-10-15 16:24:39,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:39,087 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 429 transitions. [2020-10-15 16:24:39,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:39,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:39,087 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:39,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-15 16:24:39,288 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:39,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:39,288 INFO L82 PathProgramCache]: Analyzing trace with hash 2122690711, now seen corresponding path program 193 times [2020-10-15 16:24:39,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:39,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622617481] [2020-10-15 16:24:39,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:39,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622617481] [2020-10-15 16:24:39,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200337539] [2020-10-15 16:24:39,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:39,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:39,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:39,953 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:24:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:39,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:39,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:39,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909755040] [2020-10-15 16:24:39,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:39,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:39,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:39,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:39,986 INFO L87 Difference]: Start difference. First operand 169 states and 429 transitions. Second operand 17 states. [2020-10-15 16:24:42,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:42,349 INFO L93 Difference]: Finished difference Result 291 states and 709 transitions. [2020-10-15 16:24:42,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:24:42,352 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:42,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:42,353 INFO L225 Difference]: With dead ends: 291 [2020-10-15 16:24:42,353 INFO L226 Difference]: Without dead ends: 283 [2020-10-15 16:24:42,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:24:42,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-15 16:24:42,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 167. [2020-10-15 16:24:42,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:24:42,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 16:24:42,357 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 16:24:42,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:42,357 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 16:24:42,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:42,358 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 16:24:42,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:42,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:42,358 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:42,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2020-10-15 16:24:42,559 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:42,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:42,560 INFO L82 PathProgramCache]: Analyzing trace with hash -2145285195, now seen corresponding path program 194 times [2020-10-15 16:24:42,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:42,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698962859] [2020-10-15 16:24:42,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:42,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:42,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698962859] [2020-10-15 16:24:42,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523484365] [2020-10-15 16:24:42,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:42,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:24:42,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:42,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:42,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:43,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:43,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:43,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580309965] [2020-10-15 16:24:43,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:43,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:43,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:43,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:43,316 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 16:24:45,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:45,276 INFO L93 Difference]: Finished difference Result 265 states and 622 transitions. [2020-10-15 16:24:45,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:24:45,279 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:45,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:45,279 INFO L225 Difference]: With dead ends: 265 [2020-10-15 16:24:45,279 INFO L226 Difference]: Without dead ends: 263 [2020-10-15 16:24:45,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:24:45,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-15 16:24:45,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 167. [2020-10-15 16:24:45,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:24:45,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 16:24:45,283 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 16:24:45,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:45,283 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 16:24:45,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:45,284 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 16:24:45,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:45,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:45,284 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:45,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:45,485 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:45,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:45,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2144622105, now seen corresponding path program 195 times [2020-10-15 16:24:45,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:45,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504060013] [2020-10-15 16:24:45,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:45,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504060013] [2020-10-15 16:24:45,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964518309] [2020-10-15 16:24:45,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:45,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:24:45,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:45,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:45,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:46,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:46,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:46,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781032915] [2020-10-15 16:24:46,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:46,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:46,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:46,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:46,266 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 16:24:48,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:48,550 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2020-10-15 16:24:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:24:48,553 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:48,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:48,554 INFO L225 Difference]: With dead ends: 262 [2020-10-15 16:24:48,554 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 16:24:48,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:24:48,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 16:24:48,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2020-10-15 16:24:48,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:24:48,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 16:24:48,558 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 16:24:48,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:48,558 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 16:24:48,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:48,559 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 16:24:48,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:48,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:48,559 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:48,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2020-10-15 16:24:48,760 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:48,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:48,760 INFO L82 PathProgramCache]: Analyzing trace with hash -2144599785, now seen corresponding path program 196 times [2020-10-15 16:24:48,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:48,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737374468] [2020-10-15 16:24:48,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:49,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737374468] [2020-10-15 16:24:49,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130306029] [2020-10-15 16:24:49,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:49,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:24:49,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:49,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:49,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:49,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:24:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:49,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:49,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:24:49,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371246506] [2020-10-15 16:24:49,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:24:49,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:49,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:24:49,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:24:49,581 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 16:24:52,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:52,983 INFO L93 Difference]: Finished difference Result 285 states and 688 transitions. [2020-10-15 16:24:52,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:24:52,987 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:24:52,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:52,988 INFO L225 Difference]: With dead ends: 285 [2020-10-15 16:24:52,988 INFO L226 Difference]: Without dead ends: 280 [2020-10-15 16:24:52,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:24:52,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-15 16:24:52,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 167. [2020-10-15 16:24:52,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:24:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 16:24:52,992 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 16:24:52,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:52,992 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 16:24:52,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:24:52,993 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 16:24:52,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:24:52,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:52,993 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:53,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:53,194 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:53,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:53,194 INFO L82 PathProgramCache]: Analyzing trace with hash -2144570955, now seen corresponding path program 197 times [2020-10-15 16:24:53,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:53,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253960317] [2020-10-15 16:24:53,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:53,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253960317] [2020-10-15 16:24:53,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325693] [2020-10-15 16:24:53,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:53,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:24:53,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:53,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:24:53,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:58,095 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:25:02,223 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-10-15 16:25:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:02,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:02,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 16:25:02,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761078821] [2020-10-15 16:25:02,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:25:02,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:02,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:25:02,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=220, Unknown=3, NotChecked=0, Total=306 [2020-10-15 16:25:02,227 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 18 states. [2020-10-15 16:25:06,495 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-15 16:25:07,091 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 16 [2020-10-15 16:25:11,420 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-15 16:25:11,729 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 23 [2020-10-15 16:25:14,438 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2020-10-15 16:25:16,773 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-15 16:25:44,268 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-15 16:26:38,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:38,194 INFO L93 Difference]: Finished difference Result 302 states and 718 transitions. [2020-10-15 16:26:38,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:26:38,197 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 16:26:38,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:38,198 INFO L225 Difference]: With dead ends: 302 [2020-10-15 16:26:38,198 INFO L226 Difference]: Without dead ends: 297 [2020-10-15 16:26:38,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 63.1s TimeCoverageRelationStatistics Valid=555, Invalid=1408, Unknown=17, NotChecked=0, Total=1980 [2020-10-15 16:26:38,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-15 16:26:38,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 166. [2020-10-15 16:26:38,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:26:38,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 414 transitions. [2020-10-15 16:26:38,201 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 414 transitions. Word has length 14 [2020-10-15 16:26:38,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:38,202 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 414 transitions. [2020-10-15 16:26:38,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:26:38,202 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 414 transitions. [2020-10-15 16:26:38,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:38,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:38,202 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:38,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:38,403 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:38,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:38,404 INFO L82 PathProgramCache]: Analyzing trace with hash -2143668793, now seen corresponding path program 198 times [2020-10-15 16:26:38,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:38,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942353952] [2020-10-15 16:26:38,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:38,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942353952] [2020-10-15 16:26:38,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706018802] [2020-10-15 16:26:38,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:38,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:26:38,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:38,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:38,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:39,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:39,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:26:39,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139105658] [2020-10-15 16:26:39,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:26:39,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:39,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:26:39,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:26:39,111 INFO L87 Difference]: Start difference. First operand 166 states and 414 transitions. Second operand 17 states. [2020-10-15 16:26:39,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:39,984 INFO L93 Difference]: Finished difference Result 219 states and 516 transitions. [2020-10-15 16:26:39,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:26:39,987 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:26:39,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:39,988 INFO L225 Difference]: With dead ends: 219 [2020-10-15 16:26:39,988 INFO L226 Difference]: Without dead ends: 217 [2020-10-15 16:26:39,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:26:39,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-15 16:26:39,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2020-10-15 16:26:39,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:26:39,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 16:26:39,991 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 16:26:39,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:39,992 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 16:26:39,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:26:39,992 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 16:26:39,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:39,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:39,992 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:40,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:40,193 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:40,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:40,194 INFO L82 PathProgramCache]: Analyzing trace with hash -2143646473, now seen corresponding path program 199 times [2020-10-15 16:26:40,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:40,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990313772] [2020-10-15 16:26:40,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:40,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990313772] [2020-10-15 16:26:40,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464632055] [2020-10-15 16:26:40,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:40,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:40,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:40,832 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:26:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:40,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:40,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:26:40,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178575677] [2020-10-15 16:26:40,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:26:40,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:40,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:26:40,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:26:40,865 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 16:26:41,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:41,861 INFO L93 Difference]: Finished difference Result 229 states and 538 transitions. [2020-10-15 16:26:41,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:26:41,865 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:26:41,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:41,865 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:26:41,866 INFO L226 Difference]: Without dead ends: 224 [2020-10-15 16:26:41,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:26:41,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-15 16:26:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 158. [2020-10-15 16:26:41,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 16:26:41,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 386 transitions. [2020-10-15 16:26:41,869 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 386 transitions. Word has length 14 [2020-10-15 16:26:41,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:41,870 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 386 transitions. [2020-10-15 16:26:41,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:26:41,870 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 386 transitions. [2020-10-15 16:26:41,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:41,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:41,870 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:42,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-15 16:26:42,071 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:42,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:42,072 INFO L82 PathProgramCache]: Analyzing trace with hash -255670682, now seen corresponding path program 200 times [2020-10-15 16:26:42,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:42,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911997864] [2020-10-15 16:26:42,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:42,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911997864] [2020-10-15 16:26:42,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383091469] [2020-10-15 16:26:42,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:42,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:26:42,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:42,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:42,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:42,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:42,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:26:42,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697939798] [2020-10-15 16:26:42,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:26:42,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:42,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:26:42,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:26:42,662 INFO L87 Difference]: Start difference. First operand 158 states and 386 transitions. Second operand 17 states. [2020-10-15 16:26:43,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:43,417 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-15 16:26:43,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:26:43,421 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:26:43,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:43,422 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:26:43,422 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:26:43,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:26:43,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:26:43,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-15 16:26:43,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 16:26:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-15 16:26:43,425 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-15 16:26:43,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:43,425 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-15 16:26:43,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:26:43,425 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-15 16:26:43,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:43,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:43,426 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:43,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-15 16:26:43,627 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:43,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:43,627 INFO L82 PathProgramCache]: Analyzing trace with hash -255669721, now seen corresponding path program 201 times [2020-10-15 16:26:43,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:43,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798470192] [2020-10-15 16:26:43,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:43,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798470192] [2020-10-15 16:26:43,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918834033] [2020-10-15 16:26:43,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:43,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:26:43,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:43,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:43,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:44,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:44,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:26:44,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641391547] [2020-10-15 16:26:44,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:26:44,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:44,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:26:44,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:26:44,352 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-15 16:26:45,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:45,168 INFO L93 Difference]: Finished difference Result 237 states and 545 transitions. [2020-10-15 16:26:45,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:26:45,172 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:26:45,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:45,173 INFO L225 Difference]: With dead ends: 237 [2020-10-15 16:26:45,173 INFO L226 Difference]: Without dead ends: 235 [2020-10-15 16:26:45,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:26:45,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-15 16:26:45,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 160. [2020-10-15 16:26:45,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:26:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 392 transitions. [2020-10-15 16:26:45,177 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 392 transitions. Word has length 14 [2020-10-15 16:26:45,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:45,177 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 392 transitions. [2020-10-15 16:26:45,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:26:45,177 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 392 transitions. [2020-10-15 16:26:45,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:45,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:45,178 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:45,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-15 16:26:45,380 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:45,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:45,381 INFO L82 PathProgramCache]: Analyzing trace with hash -255640891, now seen corresponding path program 202 times [2020-10-15 16:26:45,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:45,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418120749] [2020-10-15 16:26:45,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:45,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418120749] [2020-10-15 16:26:45,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861968357] [2020-10-15 16:26:45,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:45,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:26:45,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:45,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:45,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:46,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:46,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:26:46,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028788073] [2020-10-15 16:26:46,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:26:46,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:46,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:26:46,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:26:46,318 INFO L87 Difference]: Start difference. First operand 160 states and 392 transitions. Second operand 17 states. [2020-10-15 16:26:47,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:47,538 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-15 16:26:47,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:26:47,542 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:26:47,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:47,543 INFO L225 Difference]: With dead ends: 246 [2020-10-15 16:26:47,543 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 16:26:47,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:26:47,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 16:26:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 164. [2020-10-15 16:26:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:26:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 403 transitions. [2020-10-15 16:26:47,547 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 403 transitions. Word has length 14 [2020-10-15 16:26:47,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:47,547 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 403 transitions. [2020-10-15 16:26:47,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:26:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 403 transitions. [2020-10-15 16:26:47,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:47,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:47,548 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:47,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-15 16:26:47,755 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:47,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:47,755 INFO L82 PathProgramCache]: Analyzing trace with hash -254746200, now seen corresponding path program 203 times [2020-10-15 16:26:47,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:47,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256802173] [2020-10-15 16:26:47,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:48,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256802173] [2020-10-15 16:26:48,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080160049] [2020-10-15 16:26:48,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:48,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:26:48,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:48,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:48,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:48,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:48,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:26:48,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117341637] [2020-10-15 16:26:48,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:26:48,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:48,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:26:48,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:26:48,371 INFO L87 Difference]: Start difference. First operand 164 states and 403 transitions. Second operand 17 states. [2020-10-15 16:26:49,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:49,302 INFO L93 Difference]: Finished difference Result 245 states and 560 transitions. [2020-10-15 16:26:49,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:26:49,304 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:26:49,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:49,305 INFO L225 Difference]: With dead ends: 245 [2020-10-15 16:26:49,305 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 16:26:49,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:26:49,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 16:26:49,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 163. [2020-10-15 16:26:49,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:26:49,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 399 transitions. [2020-10-15 16:26:49,309 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 399 transitions. Word has length 14 [2020-10-15 16:26:49,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:49,309 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 399 transitions. [2020-10-15 16:26:49,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:26:49,309 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 399 transitions. [2020-10-15 16:26:49,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:49,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:49,309 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:49,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-15 16:26:49,510 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:49,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:49,511 INFO L82 PathProgramCache]: Analyzing trace with hash -227041531, now seen corresponding path program 204 times [2020-10-15 16:26:49,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:49,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273679057] [2020-10-15 16:26:49,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:49,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273679057] [2020-10-15 16:26:49,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710262572] [2020-10-15 16:26:49,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:49,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:26:49,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:49,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:49,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:50,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:50,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:50,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:26:50,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28418758] [2020-10-15 16:26:50,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:26:50,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:50,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:26:50,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:26:50,293 INFO L87 Difference]: Start difference. First operand 163 states and 399 transitions. Second operand 17 states. [2020-10-15 16:26:51,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:51,017 INFO L93 Difference]: Finished difference Result 239 states and 549 transitions. [2020-10-15 16:26:51,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:26:51,021 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:26:51,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:51,022 INFO L225 Difference]: With dead ends: 239 [2020-10-15 16:26:51,022 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 16:26:51,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:26:51,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 16:26:51,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 162. [2020-10-15 16:26:51,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:26:51,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 396 transitions. [2020-10-15 16:26:51,026 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 396 transitions. Word has length 14 [2020-10-15 16:26:51,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:51,026 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 396 transitions. [2020-10-15 16:26:51,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:26:51,026 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 396 transitions. [2020-10-15 16:26:51,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:51,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:51,026 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:51,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-10-15 16:26:51,227 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:51,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:51,228 INFO L82 PathProgramCache]: Analyzing trace with hash -226088219, now seen corresponding path program 205 times [2020-10-15 16:26:51,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:51,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460409484] [2020-10-15 16:26:51,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:51,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460409484] [2020-10-15 16:26:51,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113136132] [2020-10-15 16:26:51,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:51,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:51,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:52,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:52,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:26:52,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013159262] [2020-10-15 16:26:52,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:26:52,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:52,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:26:52,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:26:52,079 INFO L87 Difference]: Start difference. First operand 162 states and 396 transitions. Second operand 17 states. [2020-10-15 16:26:52,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:52,737 INFO L93 Difference]: Finished difference Result 220 states and 508 transitions. [2020-10-15 16:26:52,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:26:52,741 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:26:52,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:52,742 INFO L225 Difference]: With dead ends: 220 [2020-10-15 16:26:52,742 INFO L226 Difference]: Without dead ends: 218 [2020-10-15 16:26:52,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:26:52,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-15 16:26:52,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 156. [2020-10-15 16:26:52,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 16:26:52,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2020-10-15 16:26:52,746 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 14 [2020-10-15 16:26:52,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:52,746 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2020-10-15 16:26:52,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:26:52,746 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2020-10-15 16:26:52,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:52,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:52,747 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:52,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-15 16:26:52,948 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:52,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:52,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392972, now seen corresponding path program 206 times [2020-10-15 16:26:52,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:52,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321814024] [2020-10-15 16:26:52,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:53,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321814024] [2020-10-15 16:26:53,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516922599] [2020-10-15 16:26:53,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:53,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:26:53,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:53,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:53,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:53,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:53,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:26:53,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508815043] [2020-10-15 16:26:53,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:26:53,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:53,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:26:53,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:26:53,743 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 17 states. [2020-10-15 16:26:54,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:54,589 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-15 16:26:54,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:26:54,593 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:26:54,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:54,594 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:26:54,594 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:26:54,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:26:54,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:26:54,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-15 16:26:54,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:26:54,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 395 transitions. [2020-10-15 16:26:54,598 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 395 transitions. Word has length 14 [2020-10-15 16:26:54,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:54,598 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 395 transitions. [2020-10-15 16:26:54,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:26:54,598 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 395 transitions. [2020-10-15 16:26:54,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:54,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:54,598 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:54,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2020-10-15 16:26:54,799 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:54,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:54,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392011, now seen corresponding path program 207 times [2020-10-15 16:26:54,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:54,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383659857] [2020-10-15 16:26:54,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:54,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383659857] [2020-10-15 16:26:54,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299670255] [2020-10-15 16:26:54,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:55,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:26:55,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:55,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:55,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:55,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:55,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:26:55,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773677190] [2020-10-15 16:26:55,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:26:55,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:55,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:26:55,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:26:55,504 INFO L87 Difference]: Start difference. First operand 160 states and 395 transitions. Second operand 17 states. [2020-10-15 16:26:56,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:56,475 INFO L93 Difference]: Finished difference Result 233 states and 536 transitions. [2020-10-15 16:26:56,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:26:56,479 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:26:56,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:56,480 INFO L225 Difference]: With dead ends: 233 [2020-10-15 16:26:56,480 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 16:26:56,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:26:56,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 16:26:56,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 159. [2020-10-15 16:26:56,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 16:26:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 392 transitions. [2020-10-15 16:26:56,484 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 392 transitions. Word has length 14 [2020-10-15 16:26:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:56,484 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 392 transitions. [2020-10-15 16:26:56,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:26:56,485 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 392 transitions. [2020-10-15 16:26:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:56,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:56,485 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:56,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:56,687 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:56,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:56,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1976363181, now seen corresponding path program 208 times [2020-10-15 16:26:56,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:56,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847295955] [2020-10-15 16:26:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:56,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847295955] [2020-10-15 16:26:56,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780522458] [2020-10-15 16:26:56,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:56,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:26:57,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:57,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:57,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:57,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:57,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:57,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:26:57,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378528984] [2020-10-15 16:26:57,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:26:57,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:57,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:26:57,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:26:57,763 INFO L87 Difference]: Start difference. First operand 159 states and 392 transitions. Second operand 17 states. [2020-10-15 16:26:58,410 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2020-10-15 16:26:59,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:59,413 INFO L93 Difference]: Finished difference Result 256 states and 582 transitions. [2020-10-15 16:26:59,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:26:59,417 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:26:59,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:59,417 INFO L225 Difference]: With dead ends: 256 [2020-10-15 16:26:59,418 INFO L226 Difference]: Without dead ends: 254 [2020-10-15 16:26:59,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:26:59,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-15 16:26:59,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 163. [2020-10-15 16:26:59,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:26:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 403 transitions. [2020-10-15 16:26:59,421 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 403 transitions. Word has length 14 [2020-10-15 16:26:59,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:59,421 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 403 transitions. [2020-10-15 16:26:59,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:26:59,421 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 403 transitions. [2020-10-15 16:26:59,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:26:59,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:59,422 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:59,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:59,623 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:59,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:59,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1975468490, now seen corresponding path program 209 times [2020-10-15 16:26:59,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:59,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005435053] [2020-10-15 16:26:59,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:59,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005435053] [2020-10-15 16:26:59,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967228254] [2020-10-15 16:26:59,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:59,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:26:59,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:59,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:26:59,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:00,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:00,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:00,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866590418] [2020-10-15 16:27:00,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:00,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:00,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:00,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:00,392 INFO L87 Difference]: Start difference. First operand 163 states and 403 transitions. Second operand 17 states. [2020-10-15 16:27:01,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:01,597 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-15 16:27:01,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:27:01,601 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:01,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:01,601 INFO L225 Difference]: With dead ends: 246 [2020-10-15 16:27:01,602 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 16:27:01,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:27:01,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 16:27:01,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 162. [2020-10-15 16:27:01,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:27:01,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-10-15 16:27:01,606 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 14 [2020-10-15 16:27:01,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:01,606 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-10-15 16:27:01,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:01,606 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-10-15 16:27:01,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:01,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:01,607 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:01,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:01,808 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:01,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:01,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1339163482, now seen corresponding path program 210 times [2020-10-15 16:27:01,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:01,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988527675] [2020-10-15 16:27:01,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:02,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988527675] [2020-10-15 16:27:02,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848333759] [2020-10-15 16:27:02,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:02,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:27:02,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:02,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:02,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:02,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:02,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:02,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880487992] [2020-10-15 16:27:02,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:02,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:02,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:02,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:02,573 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 17 states. [2020-10-15 16:27:03,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:03,658 INFO L93 Difference]: Finished difference Result 250 states and 575 transitions. [2020-10-15 16:27:03,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:27:03,659 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:03,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:03,660 INFO L225 Difference]: With dead ends: 250 [2020-10-15 16:27:03,660 INFO L226 Difference]: Without dead ends: 248 [2020-10-15 16:27:03,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:27:03,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-15 16:27:03,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 164. [2020-10-15 16:27:03,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:27:03,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-15 16:27:03,663 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-15 16:27:03,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:03,663 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-15 16:27:03,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:03,663 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-15 16:27:03,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:03,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:03,664 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:03,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-10-15 16:27:03,865 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:03,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:03,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1339162521, now seen corresponding path program 211 times [2020-10-15 16:27:03,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:03,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155206001] [2020-10-15 16:27:03,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:04,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155206001] [2020-10-15 16:27:04,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874723598] [2020-10-15 16:27:04,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:04,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:04,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:04,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:04,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:04,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377664257] [2020-10-15 16:27:04,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:04,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:04,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:04,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:04,619 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-15 16:27:05,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:05,726 INFO L93 Difference]: Finished difference Result 245 states and 564 transitions. [2020-10-15 16:27:05,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:27:05,729 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:05,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:05,730 INFO L225 Difference]: With dead ends: 245 [2020-10-15 16:27:05,730 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 16:27:05,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:27:05,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 16:27:05,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 164. [2020-10-15 16:27:05,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:27:05,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-15 16:27:05,734 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-15 16:27:05,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:05,734 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-15 16:27:05,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:05,734 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-15 16:27:05,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:05,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:05,735 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:05,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:05,936 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:05,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:05,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1339133691, now seen corresponding path program 212 times [2020-10-15 16:27:05,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:05,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735713424] [2020-10-15 16:27:05,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:06,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735713424] [2020-10-15 16:27:06,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053942583] [2020-10-15 16:27:06,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:06,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:27:06,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:06,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:06,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:06,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:06,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:06,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53939268] [2020-10-15 16:27:06,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:06,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:06,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:06,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:06,635 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-15 16:27:08,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:08,395 INFO L93 Difference]: Finished difference Result 262 states and 602 transitions. [2020-10-15 16:27:08,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:27:08,399 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:08,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:08,400 INFO L225 Difference]: With dead ends: 262 [2020-10-15 16:27:08,400 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 16:27:08,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:27:08,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 16:27:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 165. [2020-10-15 16:27:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:27:08,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-15 16:27:08,404 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-15 16:27:08,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:08,404 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-15 16:27:08,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:08,404 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-15 16:27:08,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:08,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:08,405 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:08,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-10-15 16:27:08,606 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:08,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:08,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1318607692, now seen corresponding path program 213 times [2020-10-15 16:27:08,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:08,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313778712] [2020-10-15 16:27:08,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:08,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:08,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313778712] [2020-10-15 16:27:08,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612321927] [2020-10-15 16:27:08,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:08,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:27:08,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:08,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:08,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:09,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:09,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:09,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535515536] [2020-10-15 16:27:09,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:09,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:09,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:09,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:09,483 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-15 16:27:11,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:11,002 INFO L93 Difference]: Finished difference Result 254 states and 594 transitions. [2020-10-15 16:27:11,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:27:11,006 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:11,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:11,006 INFO L225 Difference]: With dead ends: 254 [2020-10-15 16:27:11,006 INFO L226 Difference]: Without dead ends: 252 [2020-10-15 16:27:11,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:27:11,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-15 16:27:11,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 166. [2020-10-15 16:27:11,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:27:11,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 416 transitions. [2020-10-15 16:27:11,009 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 416 transitions. Word has length 14 [2020-10-15 16:27:11,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:11,009 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 416 transitions. [2020-10-15 16:27:11,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:11,009 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 416 transitions. [2020-10-15 16:27:11,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:11,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:11,010 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:11,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-10-15 16:27:11,210 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:11,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:11,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1318606731, now seen corresponding path program 214 times [2020-10-15 16:27:11,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:11,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528023067] [2020-10-15 16:27:11,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:11,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528023067] [2020-10-15 16:27:11,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142743149] [2020-10-15 16:27:11,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:11,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:27:11,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:11,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:11,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:12,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:12,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:12,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733751082] [2020-10-15 16:27:12,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:12,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:12,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:12,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:12,079 INFO L87 Difference]: Start difference. First operand 166 states and 416 transitions. Second operand 17 states. [2020-10-15 16:27:13,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:13,297 INFO L93 Difference]: Finished difference Result 248 states and 576 transitions. [2020-10-15 16:27:13,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:27:13,300 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:13,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:13,301 INFO L225 Difference]: With dead ends: 248 [2020-10-15 16:27:13,301 INFO L226 Difference]: Without dead ends: 246 [2020-10-15 16:27:13,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:27:13,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-15 16:27:13,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 167. [2020-10-15 16:27:13,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:27:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 16:27:13,312 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 16:27:13,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:13,312 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 16:27:13,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 16:27:13,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:13,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:13,313 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:13,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:13,514 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:13,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:13,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1317944602, now seen corresponding path program 215 times [2020-10-15 16:27:13,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:13,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992844953] [2020-10-15 16:27:13,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:13,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:13,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992844953] [2020-10-15 16:27:13,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544900550] [2020-10-15 16:27:13,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:13,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:27:13,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:13,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:13,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:14,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:14,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:14,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733871383] [2020-10-15 16:27:14,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:14,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:14,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:14,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:14,222 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 16:27:15,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:15,594 INFO L93 Difference]: Finished difference Result 245 states and 579 transitions. [2020-10-15 16:27:15,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:27:15,598 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:15,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:15,599 INFO L225 Difference]: With dead ends: 245 [2020-10-15 16:27:15,599 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 16:27:15,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=324, Invalid=798, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:27:15,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 16:27:15,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 169. [2020-10-15 16:27:15,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:27:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 16:27:15,604 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 16:27:15,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:15,604 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 16:27:15,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:15,604 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 16:27:15,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:15,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:15,605 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:15,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:15,817 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:15,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:15,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1317923243, now seen corresponding path program 216 times [2020-10-15 16:27:15,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:15,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188997742] [2020-10-15 16:27:15,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:16,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188997742] [2020-10-15 16:27:16,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521474477] [2020-10-15 16:27:16,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:16,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:27:16,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:16,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:16,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:16,429 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:27:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:16,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:16,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:16,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617931881] [2020-10-15 16:27:16,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:16,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:16,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:16,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:16,463 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 16:27:17,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:17,404 INFO L93 Difference]: Finished difference Result 223 states and 540 transitions. [2020-10-15 16:27:17,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:27:17,409 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:17,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:17,409 INFO L225 Difference]: With dead ends: 223 [2020-10-15 16:27:17,409 INFO L226 Difference]: Without dead ends: 218 [2020-10-15 16:27:17,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:27:17,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-15 16:27:17,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2020-10-15 16:27:17,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:27:17,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 16:27:17,419 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 16:27:17,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:17,419 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 16:27:17,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:17,419 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 16:27:17,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:17,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:17,420 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:17,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-10-15 16:27:17,620 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:17,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:17,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1317922282, now seen corresponding path program 217 times [2020-10-15 16:27:17,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:17,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131615753] [2020-10-15 16:27:17,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:17,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131615753] [2020-10-15 16:27:17,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787430563] [2020-10-15 16:27:17,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:17,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:17,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:18,305 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:27:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:18,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:18,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:18,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282501110] [2020-10-15 16:27:18,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:18,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:18,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:18,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:18,413 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 16:27:19,564 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-10-15 16:27:20,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:20,609 INFO L93 Difference]: Finished difference Result 286 states and 679 transitions. [2020-10-15 16:27:20,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:27:20,614 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:20,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:20,615 INFO L225 Difference]: With dead ends: 286 [2020-10-15 16:27:20,615 INFO L226 Difference]: Without dead ends: 281 [2020-10-15 16:27:20,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:27:20,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-15 16:27:20,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 167. [2020-10-15 16:27:20,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:27:20,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 16:27:20,619 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 16:27:20,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:20,619 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 16:27:20,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 16:27:20,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:20,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:20,619 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:20,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:20,820 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:20,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:20,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1317914811, now seen corresponding path program 218 times [2020-10-15 16:27:20,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:20,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401268347] [2020-10-15 16:27:20,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:21,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401268347] [2020-10-15 16:27:21,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281321052] [2020-10-15 16:27:21,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:21,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:27:21,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:21,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:21,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:21,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:21,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:21,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488261052] [2020-10-15 16:27:21,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:21,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:21,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:21,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:21,673 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 16:27:23,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:23,497 INFO L93 Difference]: Finished difference Result 268 states and 630 transitions. [2020-10-15 16:27:23,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:27:23,499 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:23,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:23,500 INFO L225 Difference]: With dead ends: 268 [2020-10-15 16:27:23,500 INFO L226 Difference]: Without dead ends: 266 [2020-10-15 16:27:23,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:27:23,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-15 16:27:23,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 169. [2020-10-15 16:27:23,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:27:23,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 16:27:23,504 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 16:27:23,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:23,504 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 16:27:23,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:23,504 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 16:27:23,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:23,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:23,504 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:23,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2020-10-15 16:27:23,705 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:23,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:23,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1317893452, now seen corresponding path program 219 times [2020-10-15 16:27:23,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:23,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892676311] [2020-10-15 16:27:23,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:23,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892676311] [2020-10-15 16:27:23,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729814456] [2020-10-15 16:27:23,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:24,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:27:24,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:24,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:24,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:24,419 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:27:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:24,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:24,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:24,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344824099] [2020-10-15 16:27:24,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:24,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:24,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:24,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:24,518 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 16:27:26,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:26,850 INFO L93 Difference]: Finished difference Result 296 states and 707 transitions. [2020-10-15 16:27:26,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:27:26,853 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:26,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:26,854 INFO L225 Difference]: With dead ends: 296 [2020-10-15 16:27:26,855 INFO L226 Difference]: Without dead ends: 291 [2020-10-15 16:27:26,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=419, Invalid=987, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:27:26,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-15 16:27:26,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 169. [2020-10-15 16:27:26,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:27:26,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 16:27:26,858 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 16:27:26,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:26,858 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 16:27:26,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:26,858 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 16:27:26,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:26,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:26,859 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:27,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:27,060 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:27,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:27,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1317892491, now seen corresponding path program 220 times [2020-10-15 16:27:27,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:27,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488893406] [2020-10-15 16:27:27,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:27,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488893406] [2020-10-15 16:27:27,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189971905] [2020-10-15 16:27:27,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:27,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:27:27,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:27,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:27,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:27,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:27:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:27,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:27,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:27,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028132288] [2020-10-15 16:27:27,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:27,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:27,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:27,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:27,827 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 16:27:29,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:29,988 INFO L93 Difference]: Finished difference Result 299 states and 710 transitions. [2020-10-15 16:27:29,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:27:29,991 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:29,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:29,991 INFO L225 Difference]: With dead ends: 299 [2020-10-15 16:27:29,992 INFO L226 Difference]: Without dead ends: 294 [2020-10-15 16:27:29,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=476, Invalid=1084, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:27:29,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-15 16:27:29,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 165. [2020-10-15 16:27:29,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:27:29,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-15 16:27:29,999 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-15 16:27:29,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:29,999 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-15 16:27:29,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:29,999 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-15 16:27:30,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:30,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:30,000 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:30,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:30,212 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:30,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:30,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1317684171, now seen corresponding path program 221 times [2020-10-15 16:27:30,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:30,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445755053] [2020-10-15 16:27:30,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:30,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:30,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445755053] [2020-10-15 16:27:30,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289443244] [2020-10-15 16:27:30,420 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:30,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:27:30,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:30,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:30,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:31,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:31,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:31,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924630322] [2020-10-15 16:27:31,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:31,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:31,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:31,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:31,097 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-15 16:27:31,711 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 16 [2020-10-15 16:27:33,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:33,695 INFO L93 Difference]: Finished difference Result 274 states and 633 transitions. [2020-10-15 16:27:33,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:27:33,697 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:33,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:33,698 INFO L225 Difference]: With dead ends: 274 [2020-10-15 16:27:33,698 INFO L226 Difference]: Without dead ends: 272 [2020-10-15 16:27:33,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:27:33,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-15 16:27:33,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2020-10-15 16:27:33,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:27:33,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 16:27:33,701 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 16:27:33,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:33,701 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 16:27:33,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:33,702 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 16:27:33,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:33,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:33,702 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:33,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:33,910 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:33,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:33,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1317021081, now seen corresponding path program 222 times [2020-10-15 16:27:33,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:33,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885123475] [2020-10-15 16:27:33,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:34,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:34,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885123475] [2020-10-15 16:27:34,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989007768] [2020-10-15 16:27:34,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:34,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:27:34,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:34,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:34,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:34,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:34,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:34,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237851075] [2020-10-15 16:27:34,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:34,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:34,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:34,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:34,929 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 16:27:37,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:37,582 INFO L93 Difference]: Finished difference Result 282 states and 670 transitions. [2020-10-15 16:27:37,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:27:37,588 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:37,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:37,589 INFO L225 Difference]: With dead ends: 282 [2020-10-15 16:27:37,589 INFO L226 Difference]: Without dead ends: 280 [2020-10-15 16:27:37,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:27:37,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-15 16:27:37,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 174. [2020-10-15 16:27:37,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-15 16:27:37,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 442 transitions. [2020-10-15 16:27:37,594 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 442 transitions. Word has length 14 [2020-10-15 16:27:37,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:37,594 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 442 transitions. [2020-10-15 16:27:37,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:37,595 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 442 transitions. [2020-10-15 16:27:37,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:37,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:37,596 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:37,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-10-15 16:27:37,799 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:37,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:37,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1316999722, now seen corresponding path program 223 times [2020-10-15 16:27:37,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:37,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092940089] [2020-10-15 16:27:37,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:38,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:38,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092940089] [2020-10-15 16:27:38,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875015292] [2020-10-15 16:27:38,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:38,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:38,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:38,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:27:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:38,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:38,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:38,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291677288] [2020-10-15 16:27:38,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:38,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:38,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:38,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:27:38,741 INFO L87 Difference]: Start difference. First operand 174 states and 442 transitions. Second operand 17 states. [2020-10-15 16:27:40,093 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2020-10-15 16:27:40,840 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-10-15 16:27:41,452 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-10-15 16:27:42,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:42,225 INFO L93 Difference]: Finished difference Result 321 states and 773 transitions. [2020-10-15 16:27:42,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:27:42,229 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:27:42,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:42,230 INFO L225 Difference]: With dead ends: 321 [2020-10-15 16:27:42,231 INFO L226 Difference]: Without dead ends: 313 [2020-10-15 16:27:42,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=528, Invalid=1278, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:27:42,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-15 16:27:42,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 176. [2020-10-15 16:27:42,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-15 16:27:42,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 452 transitions. [2020-10-15 16:27:42,234 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 452 transitions. Word has length 14 [2020-10-15 16:27:42,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:42,234 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 452 transitions. [2020-10-15 16:27:42,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:27:42,234 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 452 transitions. [2020-10-15 16:27:42,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:27:42,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:42,235 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:42,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-10-15 16:27:42,436 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:42,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:42,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1316998761, now seen corresponding path program 224 times [2020-10-15 16:27:42,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:42,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984843801] [2020-10-15 16:27:42,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:42,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984843801] [2020-10-15 16:27:42,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945874266] [2020-10-15 16:27:42,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:42,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:27:42,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:42,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:27:42,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:47,287 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:27:47,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:47,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:47,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:27:47,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225500171] [2020-10-15 16:27:47,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:27:47,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:47,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:27:47,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=190, Unknown=2, NotChecked=0, Total=272 [2020-10-15 16:27:47,383 INFO L87 Difference]: Start difference. First operand 176 states and 452 transitions. Second operand 17 states. [2020-10-15 16:27:52,495 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-15 16:27:56,719 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-15 16:28:01,061 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 58 DAG size of output: 39 Received shutdown request... [2020-10-15 16:28:05,398 WARN L210 SmtUtils]: Removed 3 from assertion stack [2020-10-15 16:28:05,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:28:05,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-10-15 16:28:05,600 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-15 16:28:05,604 WARN L235 ceAbstractionStarter]: Timeout [2020-10-15 16:28:05,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 04:28:05 BasicIcfg [2020-10-15 16:28:05,604 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 16:28:05,605 INFO L168 Benchmark]: Toolchain (without parser) took 875947.08 ms. Allocated memory was 253.8 MB in the beginning and 232.3 MB in the end (delta: -21.5 MB). Free memory was 208.2 MB in the beginning and 175.6 MB in the end (delta: 32.6 MB). Peak memory consumption was 11.1 MB. Max. memory is 14.2 GB. [2020-10-15 16:28:05,605 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 253.8 MB. Free memory is still 230.1 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 16:28:05,605 INFO L168 Benchmark]: CACSL2BoogieTranslator took 624.83 ms. Allocated memory was 253.8 MB in the beginning and 321.4 MB in the end (delta: 67.6 MB). Free memory was 208.2 MB in the beginning and 277.2 MB in the end (delta: -69.0 MB). Peak memory consumption was 29.4 MB. Max. memory is 14.2 GB. [2020-10-15 16:28:05,606 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.52 ms. Allocated memory is still 321.4 MB. Free memory was 277.2 MB in the beginning and 274.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 16:28:05,606 INFO L168 Benchmark]: Boogie Preprocessor took 30.36 ms. Allocated memory is still 321.4 MB. Free memory was 274.7 MB in the beginning and 272.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 16:28:05,606 INFO L168 Benchmark]: RCFGBuilder took 377.95 ms. Allocated memory is still 321.4 MB. Free memory was 272.2 MB in the beginning and 252.9 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. [2020-10-15 16:28:05,607 INFO L168 Benchmark]: TraceAbstraction took 874859.31 ms. Allocated memory was 321.4 MB in the beginning and 232.3 MB in the end (delta: -89.1 MB). Free memory was 252.9 MB in the beginning and 175.6 MB in the end (delta: 77.3 MB). There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 16:28:05,609 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 253.8 MB. Free memory is still 230.1 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 624.83 ms. Allocated memory was 253.8 MB in the beginning and 321.4 MB in the end (delta: 67.6 MB). Free memory was 208.2 MB in the beginning and 277.2 MB in the end (delta: -69.0 MB). Peak memory consumption was 29.4 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 49.52 ms. Allocated memory is still 321.4 MB. Free memory was 277.2 MB in the beginning and 274.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 30.36 ms. Allocated memory is still 321.4 MB. Free memory was 274.7 MB in the beginning and 272.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 377.95 ms. Allocated memory is still 321.4 MB. Free memory was 272.2 MB in the beginning and 252.9 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. * TraceAbstraction took 874859.31 ms. Allocated memory was 321.4 MB in the beginning and 232.3 MB in the end (delta: -89.1 MB). Free memory was 252.9 MB in the beginning and 175.6 MB in the end (delta: 77.3 MB). There was no memory consumed. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 721 VarBasedMoverChecksPositive, 19 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 21 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 59 PlacesBefore, 20 PlacesAfterwards, 57 TransitionsBefore, 15 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 3 ChoiceCompositions, 50 TotalNumberOfCompositions, 1052 MoverChecksTotal - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was constructing difference of abstraction (176states) and FLOYD_HOARE automaton (currently 16 states, 17 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 51 for 4115ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 874.7s, OverallIterations: 258, TraceHistogramMax: 6, AutomataDifference: 669.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 3352 SDtfs, 30871 SDslu, 25526 SDs, 0 SdLazy, 18143 SolverSat, 7663 SolverUnsat, 113 SolverUnknown, 0 SolverNotchecked, 240.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7344 GetRequests, 1247 SyntacticMatches, 237 SemanticMatches, 5859 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 38291 ImplicationChecksByTransitivity, 537.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=176occurred in iteration=257, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 257 MinimizatonAttempts, 15140 StatesRemovedByMinimization, 257 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.4s SsaConstructionTime, 3.8s SatisfiabilityAnalysisTime, 138.8s InterpolantComputationTime, 6574 NumberOfCodeBlocks, 6574 NumberOfCodeBlocksAsserted, 805 NumberOfCheckSat, 6066 ConstructedInterpolants, 32 QuantifiedInterpolants, 673315 SizeOfPredicates, 250 NumberOfNonLiveVariables, 22230 ConjunctsInSsa, 2536 ConjunctsInUnsatCore, 508 InterpolantComputations, 8 PerfectInterpolantSequences, 0/2794 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