/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/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 13:12:58,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 13:12:58,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 13:12:58,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 13:12:58,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 13:12:58,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 13:12:58,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 13:12:58,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 13:12:58,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 13:12:58,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 13:12:58,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 13:12:58,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 13:12:58,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 13:12:58,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 13:12:58,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 13:12:58,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 13:12:58,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 13:12:58,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 13:12:58,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 13:12:58,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 13:12:58,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 13:12:58,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 13:12:58,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 13:12:58,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 13:12:58,280 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-11 13:12:58,280 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-11 13:12:58,281 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-11 13:12:58,287 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-11 13:12:58,288 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-11 13:12:58,289 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-11 13:12:58,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 13:12:58,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 13:12:58,293 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 13:12:58,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 13:12:58,297 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 13:12:58,297 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 13:12:58,298 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 13:12:58,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 13:12:58,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 13:12:58,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 13:12:58,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 13:12:58,301 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 [2020-10-11 13:12:58,342 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 13:12:58,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 13:12:58,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 13:12:58,346 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 13:12:58,347 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 13:12:58,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 13:12:58,347 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 13:12:58,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 13:12:58,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 13:12:58,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 13:12:58,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 13:12:58,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 13:12:58,348 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 13:12:58,348 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 13:12:58,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 13:12:58,349 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 13:12:58,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 13:12:58,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 13:12:58,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 13:12:58,351 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 13:12:58,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 13:12:58,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 13:12:58,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 13:12:58,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 13:12:58,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 13:12:58,352 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 13:12:58,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 13:12:58,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-11 13:12:58,353 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-11 13:12:58,353 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 13:12:58,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 13:12:58,639 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 13:12:58,642 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 13:12:58,644 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 13:12:58,644 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 13:12:58,645 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2020-10-11 13:12:58,704 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1d4c41b6/abe1ff4f2af346678763cbb2e3571da7/FLAG5ecbf8474 [2020-10-11 13:12:59,243 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 13:12:59,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2020-10-11 13:12:59,259 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1d4c41b6/abe1ff4f2af346678763cbb2e3571da7/FLAG5ecbf8474 [2020-10-11 13:12:59,458 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1d4c41b6/abe1ff4f2af346678763cbb2e3571da7 [2020-10-11 13:12:59,467 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 13:12:59,469 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 13:12:59,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 13:12:59,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 13:12:59,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 13:12:59,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 01:12:59" (1/1) ... [2020-10-11 13:12:59,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a0e8d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:12:59, skipping insertion in model container [2020-10-11 13:12:59,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 01:12:59" (1/1) ... [2020-10-11 13:12:59,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 13:12:59,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 13:13:00,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 13:13:00,024 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 13:13:00,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 13:13:00,140 INFO L208 MainTranslator]: Completed translation [2020-10-11 13:13:00,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:00 WrapperNode [2020-10-11 13:13:00,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 13:13:00,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 13:13:00,142 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 13:13:00,142 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 13:13:00,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:00" (1/1) ... [2020-10-11 13:13:00,166 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:00" (1/1) ... [2020-10-11 13:13:00,188 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 13:13:00,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 13:13:00,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 13:13:00,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 13:13:00,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:00" (1/1) ... [2020-10-11 13:13:00,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:00" (1/1) ... [2020-10-11 13:13:00,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:00" (1/1) ... [2020-10-11 13:13:00,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:00" (1/1) ... [2020-10-11 13:13:00,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:00" (1/1) ... [2020-10-11 13:13:00,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:00" (1/1) ... [2020-10-11 13:13:00,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:00" (1/1) ... [2020-10-11 13:13:00,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 13:13:00,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 13:13:00,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 13:13:00,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 13:13:00,217 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:00" (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 [2020-10-11 13:13:00,287 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-11 13:13:00,287 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-11 13:13:00,287 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-11 13:13:00,287 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-11 13:13:00,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 13:13:00,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-11 13:13:00,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 13:13:00,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 13:13:00,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-11 13:13:00,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 13:13:00,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 13:13:00,290 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-11 13:13:00,574 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 13:13:00,574 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-11 13:13:00,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 01:13:00 BoogieIcfgContainer [2020-10-11 13:13:00,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 13:13:00,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 13:13:00,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 13:13:00,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 13:13:00,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 01:12:59" (1/3) ... [2020-10-11 13:13:00,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce851e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 01:13:00, skipping insertion in model container [2020-10-11 13:13:00,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:00" (2/3) ... [2020-10-11 13:13:00,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce851e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 01:13:00, skipping insertion in model container [2020-10-11 13:13:00,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 01:13:00" (3/3) ... [2020-10-11 13:13:00,586 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2020-10-11 13:13:00,600 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-11 13:13:00,601 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 13:13:00,610 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-11 13:13:00,611 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 13:13:00,638 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,639 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,639 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,639 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,640 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,640 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,640 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,640 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,641 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,641 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,641 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,642 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,642 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,642 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,643 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,643 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,643 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,644 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,644 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,644 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,645 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,645 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,645 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,646 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,646 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,646 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,647 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,647 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,650 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,651 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,651 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,651 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,652 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,652 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,658 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,658 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,659 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,659 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,659 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,659 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:00,675 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-11 13:13:00,698 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 13:13:00,699 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-11 13:13:00,699 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 13:13:00,699 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 13:13:00,699 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 13:13:00,699 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 13:13:00,699 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 13:13:00,700 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 13:13:00,713 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-11 13:13:00,716 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-11 13:13:00,719 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-11 13:13:00,721 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-11 13:13:00,762 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-11 13:13:00,762 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 13:13:00,769 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-11 13:13:00,772 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-11 13:13:01,814 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-11 13:13:02,036 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-11 13:13:02,036 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-11 13:13:02,043 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-11 13:13:02,054 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-11 13:13:02,056 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-11 13:13:02,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-11 13:13:02,063 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:02,064 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-11 13:13:02,065 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:02,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:02,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-11 13:13:02,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:02,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116213907] [2020-10-11 13:13:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:02,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116213907] [2020-10-11 13:13:02,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:13:02,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 13:13:02,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556794033] [2020-10-11 13:13:02,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 13:13:02,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:02,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 13:13:02,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-11 13:13:02,325 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-11 13:13:02,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:02,398 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-11 13:13:02,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-11 13:13:02,400 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-11 13:13:02,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:02,412 INFO L225 Difference]: With dead ends: 75 [2020-10-11 13:13:02,412 INFO L226 Difference]: Without dead ends: 42 [2020-10-11 13:13:02,414 INFO L673 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 [2020-10-11 13:13:02,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-11 13:13:02,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-11 13:13:02,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 13:13:02,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-11 13:13:02,455 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-11 13:13:02,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:02,456 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-11 13:13:02,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 13:13:02,456 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-11 13:13:02,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-11 13:13:02,457 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:02,457 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:02,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 13:13:02,458 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:02,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:02,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-11 13:13:02,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:02,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750751857] [2020-10-11 13:13:02,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:02,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:02,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750751857] [2020-10-11 13:13:02,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:13:02,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 13:13:02,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059581230] [2020-10-11 13:13:02,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 13:13:02,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:02,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 13:13:02,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 13:13:02,559 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-11 13:13:02,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:02,590 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-11 13:13:02,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 13:13:02,591 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-11 13:13:02,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:02,592 INFO L225 Difference]: With dead ends: 56 [2020-10-11 13:13:02,592 INFO L226 Difference]: Without dead ends: 50 [2020-10-11 13:13:02,593 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-11 13:13:02,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-11 13:13:02,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-11 13:13:02,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 13:13:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-11 13:13:02,601 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-11 13:13:02,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:02,602 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-11 13:13:02,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 13:13:02,602 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-11 13:13:02,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 13:13:02,603 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:02,603 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:02,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 13:13:02,604 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:02,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:02,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-11 13:13:02,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:02,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398865473] [2020-10-11 13:13:02,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:02,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398865473] [2020-10-11 13:13:02,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:13:02,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 13:13:02,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123238950] [2020-10-11 13:13:02,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 13:13:02,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:02,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 13:13:02,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-11 13:13:02,673 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-11 13:13:02,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:02,746 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-11 13:13:02,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 13:13:02,747 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 13:13:02,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:02,748 INFO L225 Difference]: With dead ends: 78 [2020-10-11 13:13:02,748 INFO L226 Difference]: Without dead ends: 71 [2020-10-11 13:13:02,749 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:02,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-11 13:13:02,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-11 13:13:02,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:02,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-11 13:13:02,758 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-11 13:13:02,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:02,759 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-11 13:13:02,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 13:13:02,759 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-11 13:13:02,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 13:13:02,760 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:02,760 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:02,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-11 13:13:02,761 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:02,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:02,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-11 13:13:02,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:02,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804072951] [2020-10-11 13:13:02,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:02,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804072951] [2020-10-11 13:13:02,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:13:02,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 13:13:02,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367714018] [2020-10-11 13:13:02,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 13:13:02,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:02,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 13:13:02,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-11 13:13:02,842 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-11 13:13:02,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:02,925 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-11 13:13:02,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 13:13:02,926 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 13:13:02,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:02,927 INFO L225 Difference]: With dead ends: 54 [2020-10-11 13:13:02,927 INFO L226 Difference]: Without dead ends: 43 [2020-10-11 13:13:02,928 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:02,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-11 13:13:02,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-11 13:13:02,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-11 13:13:02,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-11 13:13:02,933 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-11 13:13:02,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:02,934 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-11 13:13:02,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 13:13:02,934 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-11 13:13:02,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 13:13:02,935 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:02,935 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:02,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-11 13:13:02,936 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:02,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:02,936 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-11 13:13:02,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:02,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351709300] [2020-10-11 13:13:02,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:03,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351709300] [2020-10-11 13:13:03,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:13:03,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 13:13:03,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116140167] [2020-10-11 13:13:03,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 13:13:03,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:03,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 13:13:03,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-11 13:13:03,020 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-11 13:13:03,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:03,106 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-11 13:13:03,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 13:13:03,113 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 13:13:03,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:03,114 INFO L225 Difference]: With dead ends: 57 [2020-10-11 13:13:03,115 INFO L226 Difference]: Without dead ends: 51 [2020-10-11 13:13:03,115 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:03,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-11 13:13:03,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-11 13:13:03,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-11 13:13:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-11 13:13:03,120 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-11 13:13:03,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:03,120 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-11 13:13:03,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 13:13:03,121 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-11 13:13:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:13:03,121 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:03,121 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:03,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-11 13:13:03,127 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:03,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:03,128 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-11 13:13:03,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:03,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366211843] [2020-10-11 13:13:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:03,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:03,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366211843] [2020-10-11 13:13:03,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483036867] [2020-10-11 13:13:03,218 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 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 [2020-10-11 13:13:03,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:03,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:03,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:13:03,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:03,325 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:03,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:03,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-11 13:13:03,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433443669] [2020-10-11 13:13:03,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:03,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:03,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:03,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:13:03,350 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-11 13:13:03,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:03,454 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-11 13:13:03,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 13:13:03,455 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-11 13:13:03,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:03,456 INFO L225 Difference]: With dead ends: 48 [2020-10-11 13:13:03,456 INFO L226 Difference]: Without dead ends: 43 [2020-10-11 13:13:03,457 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:03,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-11 13:13:03,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-11 13:13:03,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-11 13:13:03,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-11 13:13:03,461 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-11 13:13:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:03,462 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-11 13:13:03,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:03,462 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-11 13:13:03,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:13:03,463 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:03,463 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:03,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-11 13:13:03,675 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:03,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:03,676 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-11 13:13:03,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:03,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436415078] [2020-10-11 13:13:03,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:03,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436415078] [2020-10-11 13:13:03,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670116765] [2020-10-11 13:13:03,737 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 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 [2020-10-11 13:13:03,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:03,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:03,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:13:03,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:03,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:03,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-11 13:13:03,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911532232] [2020-10-11 13:13:03,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 13:13:03,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:03,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 13:13:03,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-11 13:13:03,807 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-11 13:13:03,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:03,873 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-11 13:13:03,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 13:13:03,874 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-11 13:13:03,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:03,875 INFO L225 Difference]: With dead ends: 54 [2020-10-11 13:13:03,875 INFO L226 Difference]: Without dead ends: 48 [2020-10-11 13:13:03,875 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:03,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-11 13:13:03,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-11 13:13:03,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 13:13:03,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-11 13:13:03,880 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-11 13:13:03,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:03,881 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-11 13:13:03,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 13:13:03,881 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-11 13:13:03,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:13:03,882 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:03,882 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:04,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:04,094 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:04,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:04,095 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-11 13:13:04,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:04,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652462017] [2020-10-11 13:13:04,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:04,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652462017] [2020-10-11 13:13:04,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212335310] [2020-10-11 13:13:04,177 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 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 [2020-10-11 13:13:04,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 13:13:04,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:04,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:13:04,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:04,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:04,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:04,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-11 13:13:04,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339475701] [2020-10-11 13:13:04,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:04,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:04,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:04,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:13:04,327 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-11 13:13:04,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:04,454 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-11 13:13:04,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 13:13:04,455 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-11 13:13:04,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:04,455 INFO L225 Difference]: With dead ends: 58 [2020-10-11 13:13:04,456 INFO L226 Difference]: Without dead ends: 52 [2020-10-11 13:13:04,456 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:04,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-11 13:13:04,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-11 13:13:04,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-11 13:13:04,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-11 13:13:04,462 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-11 13:13:04,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:04,462 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-11 13:13:04,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:04,462 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-11 13:13:04,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:13:04,463 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:04,463 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:04,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:04,670 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:04,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:04,671 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-11 13:13:04,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:04,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081536598] [2020-10-11 13:13:04,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:04,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:04,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081536598] [2020-10-11 13:13:04,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139792089] [2020-10-11 13:13:04,755 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 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 [2020-10-11 13:13:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:04,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:13:04,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:04,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:04,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-11 13:13:04,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952016017] [2020-10-11 13:13:04,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 13:13:04,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:04,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 13:13:04,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-11 13:13:04,824 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-11 13:13:04,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:04,986 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-11 13:13:04,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:04,988 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-11 13:13:04,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:04,989 INFO L225 Difference]: With dead ends: 78 [2020-10-11 13:13:04,989 INFO L226 Difference]: Without dead ends: 72 [2020-10-11 13:13:04,989 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:04,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-11 13:13:04,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-11 13:13:04,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:04,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-11 13:13:05,000 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-11 13:13:05,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:05,002 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-11 13:13:05,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 13:13:05,002 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-11 13:13:05,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:13:05,003 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:05,003 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:05,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:05,204 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:05,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:05,205 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-11 13:13:05,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:05,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778934501] [2020-10-11 13:13:05,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:05,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778934501] [2020-10-11 13:13:05,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228422832] [2020-10-11 13:13:05,287 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 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 [2020-10-11 13:13:05,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:05,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:05,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:13:05,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:05,367 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:05,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:05,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-11 13:13:05,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782278343] [2020-10-11 13:13:05,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:05,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:05,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:05,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:13:05,378 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-11 13:13:05,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:05,556 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-11 13:13:05,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 13:13:05,557 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-11 13:13:05,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:05,558 INFO L225 Difference]: With dead ends: 62 [2020-10-11 13:13:05,558 INFO L226 Difference]: Without dead ends: 54 [2020-10-11 13:13:05,558 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:05,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-11 13:13:05,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-11 13:13:05,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-11 13:13:05,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-11 13:13:05,563 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-11 13:13:05,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:05,563 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-11 13:13:05,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:05,563 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-11 13:13:05,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:13:05,564 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:05,564 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:05,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-11 13:13:05,765 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:05,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:05,766 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-11 13:13:05,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:05,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974190582] [2020-10-11 13:13:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:05,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974190582] [2020-10-11 13:13:05,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172342345] [2020-10-11 13:13:05,839 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 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 [2020-10-11 13:13:05,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 13:13:05,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:05,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:05,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:05,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:05,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-11 13:13:05,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313086151] [2020-10-11 13:13:05,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:05,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:05,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:05,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:13:05,913 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-11 13:13:06,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:06,025 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-11 13:13:06,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 13:13:06,025 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-11 13:13:06,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:06,026 INFO L225 Difference]: With dead ends: 64 [2020-10-11 13:13:06,026 INFO L226 Difference]: Without dead ends: 58 [2020-10-11 13:13:06,027 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:06,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-11 13:13:06,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-11 13:13:06,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-11 13:13:06,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-11 13:13:06,033 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-11 13:13:06,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:06,034 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-11 13:13:06,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:06,037 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-11 13:13:06,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:13:06,037 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:06,038 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:06,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:06,249 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:06,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:06,249 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-11 13:13:06,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:06,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036423688] [2020-10-11 13:13:06,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:06,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:06,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036423688] [2020-10-11 13:13:06,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116273850] [2020-10-11 13:13:06,312 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 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 [2020-10-11 13:13:06,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:06,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:06,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:06,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:06,378 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:06,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:06,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-11 13:13:06,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912942736] [2020-10-11 13:13:06,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:06,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:06,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:06,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:06,399 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-11 13:13:06,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:06,553 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-11 13:13:06,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 13:13:06,553 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-11 13:13:06,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:06,554 INFO L225 Difference]: With dead ends: 61 [2020-10-11 13:13:06,554 INFO L226 Difference]: Without dead ends: 55 [2020-10-11 13:13:06,555 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:13:06,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-11 13:13:06,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-11 13:13:06,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-11 13:13:06,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-11 13:13:06,560 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-11 13:13:06,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:06,561 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-11 13:13:06,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:06,561 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-11 13:13:06,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:13:06,561 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:06,562 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:06,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:06,770 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:06,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:06,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-11 13:13:06,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:06,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741677185] [2020-10-11 13:13:06,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:06,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:06,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741677185] [2020-10-11 13:13:06,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928828784] [2020-10-11 13:13:06,835 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 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 [2020-10-11 13:13:06,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:06,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:06,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:06,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:06,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:06,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-11 13:13:06,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995461345] [2020-10-11 13:13:06,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:06,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:06,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:06,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:13:06,912 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-11 13:13:07,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:07,038 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-11 13:13:07,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:07,038 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-11 13:13:07,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:07,039 INFO L225 Difference]: With dead ends: 77 [2020-10-11 13:13:07,039 INFO L226 Difference]: Without dead ends: 71 [2020-10-11 13:13:07,040 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:13:07,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-11 13:13:07,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-11 13:13:07,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-11 13:13:07,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-11 13:13:07,044 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-11 13:13:07,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:07,044 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-11 13:13:07,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:07,044 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-11 13:13:07,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:13:07,045 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:07,045 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:07,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-11 13:13:07,255 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:07,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:07,255 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-11 13:13:07,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:07,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711411312] [2020-10-11 13:13:07,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:07,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711411312] [2020-10-11 13:13:07,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482636915] [2020-10-11 13:13:07,310 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 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 [2020-10-11 13:13:07,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 13:13:07,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:07,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:07,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:07,394 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:07,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:07,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-11 13:13:07,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107051447] [2020-10-11 13:13:07,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:07,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:07,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:07,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:07,411 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-11 13:13:07,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:07,640 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-10-11 13:13:07,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 13:13:07,642 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-11 13:13:07,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:07,643 INFO L225 Difference]: With dead ends: 58 [2020-10-11 13:13:07,643 INFO L226 Difference]: Without dead ends: 50 [2020-10-11 13:13:07,644 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:13:07,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-11 13:13:07,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-11 13:13:07,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-11 13:13:07,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-11 13:13:07,648 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-11 13:13:07,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:07,649 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-11 13:13:07,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:07,649 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-11 13:13:07,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:13:07,650 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:07,650 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:07,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:07,862 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:07,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:07,863 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-11 13:13:07,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:07,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397712118] [2020-10-11 13:13:07,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:07,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397712118] [2020-10-11 13:13:07,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258361162] [2020-10-11 13:13:07,913 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 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 [2020-10-11 13:13:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:07,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:07,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:07,992 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:08,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:08,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-11 13:13:08,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738475108] [2020-10-11 13:13:08,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:08,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:08,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:08,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:08,007 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-11 13:13:08,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:08,158 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-11 13:13:08,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:08,159 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-11 13:13:08,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:08,161 INFO L225 Difference]: With dead ends: 60 [2020-10-11 13:13:08,161 INFO L226 Difference]: Without dead ends: 55 [2020-10-11 13:13:08,162 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:13:08,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-11 13:13:08,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-11 13:13:08,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:08,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-11 13:13:08,165 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-11 13:13:08,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:08,165 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-11 13:13:08,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:08,165 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-11 13:13:08,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:08,166 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:08,166 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:08,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-11 13:13:08,376 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:08,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:08,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-11 13:13:08,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:08,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240335759] [2020-10-11 13:13:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:08,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240335759] [2020-10-11 13:13:08,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257675088] [2020-10-11 13:13:08,434 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 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 [2020-10-11 13:13:08,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:08,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:08,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:08,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:08,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:08,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:08,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-11 13:13:08,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080141531] [2020-10-11 13:13:08,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:08,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:08,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:08,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:08,519 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-11 13:13:08,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:08,705 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-11 13:13:08,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:08,706 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-11 13:13:08,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:08,707 INFO L225 Difference]: With dead ends: 54 [2020-10-11 13:13:08,707 INFO L226 Difference]: Without dead ends: 49 [2020-10-11 13:13:08,707 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:13:08,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-11 13:13:08,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-11 13:13:08,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-11 13:13:08,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-11 13:13:08,710 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-11 13:13:08,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:08,710 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-11 13:13:08,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:08,710 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-11 13:13:08,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:08,711 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:08,711 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:08,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-11 13:13:08,912 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:08,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:08,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-11 13:13:08,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:08,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624594198] [2020-10-11 13:13:08,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:08,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624594198] [2020-10-11 13:13:08,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120053457] [2020-10-11 13:13:08,990 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 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 [2020-10-11 13:13:09,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 13:13:09,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:09,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:09,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:09,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:09,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-11 13:13:09,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860279380] [2020-10-11 13:13:09,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:09,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:09,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:09,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:09,051 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-11 13:13:09,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:09,149 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-11 13:13:09,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 13:13:09,150 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-11 13:13:09,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:09,151 INFO L225 Difference]: With dead ends: 60 [2020-10-11 13:13:09,151 INFO L226 Difference]: Without dead ends: 54 [2020-10-11 13:13:09,152 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:09,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-11 13:13:09,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-11 13:13:09,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:09,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-11 13:13:09,155 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-11 13:13:09,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:09,156 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-11 13:13:09,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:09,156 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-11 13:13:09,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:09,156 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:09,157 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:09,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-11 13:13:09,367 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:09,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:09,368 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-11 13:13:09,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:09,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058846926] [2020-10-11 13:13:09,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:09,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058846926] [2020-10-11 13:13:09,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222498784] [2020-10-11 13:13:09,438 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 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 [2020-10-11 13:13:09,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:09,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:09,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:09,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:09,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:09,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:09,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-11 13:13:09,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14129415] [2020-10-11 13:13:09,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:09,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:09,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:09,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:09,532 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-11 13:13:09,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:09,664 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-11 13:13:09,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 13:13:09,665 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-11 13:13:09,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:09,666 INFO L225 Difference]: With dead ends: 66 [2020-10-11 13:13:09,666 INFO L226 Difference]: Without dead ends: 60 [2020-10-11 13:13:09,666 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:13:09,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-11 13:13:09,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-11 13:13:09,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-11 13:13:09,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-11 13:13:09,670 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-11 13:13:09,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:09,670 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-11 13:13:09,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-11 13:13:09,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:09,671 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:09,671 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:09,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-11 13:13:09,881 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:09,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:09,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-11 13:13:09,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:09,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848959570] [2020-10-11 13:13:09,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:09,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848959570] [2020-10-11 13:13:09,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163716469] [2020-10-11 13:13:09,944 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 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 [2020-10-11 13:13:10,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 13:13:10,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:10,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:10,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:10,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:10,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-11 13:13:10,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885609348] [2020-10-11 13:13:10,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:10,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:10,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:10,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:10,034 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-11 13:13:10,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:10,181 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-11 13:13:10,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 13:13:10,182 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-11 13:13:10,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:10,183 INFO L225 Difference]: With dead ends: 67 [2020-10-11 13:13:10,183 INFO L226 Difference]: Without dead ends: 61 [2020-10-11 13:13:10,184 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:13:10,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-11 13:13:10,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-11 13:13:10,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-11 13:13:10,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-11 13:13:10,188 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-11 13:13:10,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:10,188 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-11 13:13:10,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:10,188 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-11 13:13:10,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:10,189 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:10,189 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:10,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:10,401 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:10,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:10,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-11 13:13:10,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:10,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106684176] [2020-10-11 13:13:10,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:10,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:10,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106684176] [2020-10-11 13:13:10,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559584329] [2020-10-11 13:13:10,461 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 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 [2020-10-11 13:13:10,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 13:13:10,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:10,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:10,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:10,527 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:10,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:10,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-11 13:13:10,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476215500] [2020-10-11 13:13:10,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:10,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:10,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:10,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:10,539 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-11 13:13:10,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:10,732 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-11 13:13:10,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 13:13:10,732 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-11 13:13:10,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:10,733 INFO L225 Difference]: With dead ends: 69 [2020-10-11 13:13:10,733 INFO L226 Difference]: Without dead ends: 63 [2020-10-11 13:13:10,734 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:13:10,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-11 13:13:10,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-11 13:13:10,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:10,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-11 13:13:10,736 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-11 13:13:10,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:10,737 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-11 13:13:10,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:10,737 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-11 13:13:10,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:10,737 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:10,737 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:10,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:10,938 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:10,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:10,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-11 13:13:10,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:10,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536159119] [2020-10-11 13:13:10,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:10,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536159119] [2020-10-11 13:13:10,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59356387] [2020-10-11 13:13:10,995 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 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 [2020-10-11 13:13:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:11,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:11,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:11,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:11,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-11 13:13:11,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429500315] [2020-10-11 13:13:11,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:11,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:11,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:11,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:11,055 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-11 13:13:11,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:11,256 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-11 13:13:11,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:11,257 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-11 13:13:11,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:11,258 INFO L225 Difference]: With dead ends: 88 [2020-10-11 13:13:11,258 INFO L226 Difference]: Without dead ends: 82 [2020-10-11 13:13:11,258 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:13:11,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-11 13:13:11,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-11 13:13:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 13:13:11,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-11 13:13:11,262 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-11 13:13:11,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:11,263 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-11 13:13:11,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:11,263 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-11 13:13:11,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:11,263 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:11,263 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:11,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:11,464 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:11,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:11,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-11 13:13:11,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:11,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576085781] [2020-10-11 13:13:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:11,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576085781] [2020-10-11 13:13:11,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690642650] [2020-10-11 13:13:11,520 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 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 [2020-10-11 13:13:11,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:11,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:11,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:11,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:11,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:11,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:11,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-11 13:13:11,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337117379] [2020-10-11 13:13:11,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:11,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:11,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:11,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:11,586 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-11 13:13:11,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:11,856 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-11 13:13:11,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:11,857 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-11 13:13:11,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:11,858 INFO L225 Difference]: With dead ends: 69 [2020-10-11 13:13:11,858 INFO L226 Difference]: Without dead ends: 61 [2020-10-11 13:13:11,858 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:13:11,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-11 13:13:11,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-11 13:13:11,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-11 13:13:11,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-11 13:13:11,862 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-11 13:13:11,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:11,863 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-11 13:13:11,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:11,863 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-11 13:13:11,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:11,866 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:11,866 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:12,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-11 13:13:12,075 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:12,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:12,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-11 13:13:12,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:12,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291508411] [2020-10-11 13:13:12,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:12,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291508411] [2020-10-11 13:13:12,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122058226] [2020-10-11 13:13:12,175 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 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 [2020-10-11 13:13:12,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 13:13:12,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:12,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:12,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:12,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:12,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:12,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-11 13:13:12,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242284762] [2020-10-11 13:13:12,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:12,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:12,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:12,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:12,237 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-11 13:13:12,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:12,379 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-11 13:13:12,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:12,380 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-11 13:13:12,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:12,381 INFO L225 Difference]: With dead ends: 74 [2020-10-11 13:13:12,381 INFO L226 Difference]: Without dead ends: 68 [2020-10-11 13:13:12,382 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:13:12,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-11 13:13:12,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-11 13:13:12,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-11 13:13:12,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-11 13:13:12,385 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-11 13:13:12,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:12,385 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-11 13:13:12,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:12,386 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-11 13:13:12,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:12,386 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:12,386 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:12,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-11 13:13:12,587 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:12,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:12,588 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-11 13:13:12,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:12,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785731041] [2020-10-11 13:13:12,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:12,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785731041] [2020-10-11 13:13:12,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056074280] [2020-10-11 13:13:12,663 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 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 [2020-10-11 13:13:12,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:12,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:12,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:12,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:12,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:12,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:12,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 13:13:12,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227483526] [2020-10-11 13:13:12,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:12,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:12,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:12,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:12,736 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-11 13:13:12,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:12,932 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-11 13:13:12,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 13:13:12,933 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-11 13:13:12,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:12,934 INFO L225 Difference]: With dead ends: 71 [2020-10-11 13:13:12,934 INFO L226 Difference]: Without dead ends: 65 [2020-10-11 13:13:12,935 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:13:12,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-11 13:13:12,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-11 13:13:12,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:13:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-11 13:13:12,937 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-11 13:13:12,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:12,938 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-11 13:13:12,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:12,938 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-11 13:13:12,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:12,938 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:12,938 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:13,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-11 13:13:13,147 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:13,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:13,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-11 13:13:13,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:13,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391829181] [2020-10-11 13:13:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:13,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391829181] [2020-10-11 13:13:13,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546532248] [2020-10-11 13:13:13,233 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 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 [2020-10-11 13:13:13,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 13:13:13,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:13,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:13,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:13,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:13,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-11 13:13:13,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038576821] [2020-10-11 13:13:13,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:13,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:13,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:13,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:13,295 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-11 13:13:13,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:13,453 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-11 13:13:13,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 13:13:13,453 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-11 13:13:13,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:13,454 INFO L225 Difference]: With dead ends: 68 [2020-10-11 13:13:13,454 INFO L226 Difference]: Without dead ends: 62 [2020-10-11 13:13:13,455 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:13:13,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-11 13:13:13,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-11 13:13:13,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-11 13:13:13,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-11 13:13:13,458 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-11 13:13:13,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:13,458 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-11 13:13:13,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:13,459 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-11 13:13:13,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:13,459 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:13,459 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:13,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-11 13:13:13,668 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:13,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:13,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-11 13:13:13,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:13,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023166809] [2020-10-11 13:13:13,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:13,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023166809] [2020-10-11 13:13:13,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610021604] [2020-10-11 13:13:13,731 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 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 [2020-10-11 13:13:13,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 13:13:13,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:13,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:13,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:13,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:13,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:13,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 13:13:13,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954254864] [2020-10-11 13:13:13,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:13,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:13,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:13,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:13,853 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-11 13:13:14,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:14,103 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-11 13:13:14,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:14,104 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-11 13:13:14,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:14,105 INFO L225 Difference]: With dead ends: 67 [2020-10-11 13:13:14,105 INFO L226 Difference]: Without dead ends: 61 [2020-10-11 13:13:14,105 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:13:14,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-11 13:13:14,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-11 13:13:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:13:14,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-11 13:13:14,108 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-11 13:13:14,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:14,108 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-11 13:13:14,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:14,108 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-11 13:13:14,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:14,109 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:14,109 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:14,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-11 13:13:14,311 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:14,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:14,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-11 13:13:14,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:14,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437012689] [2020-10-11 13:13:14,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:14,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437012689] [2020-10-11 13:13:14,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908728630] [2020-10-11 13:13:14,371 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 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 [2020-10-11 13:13:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:14,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:14,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:14,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:14,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-11 13:13:14,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110203425] [2020-10-11 13:13:14,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:14,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:14,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:14,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:14,447 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-11 13:13:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:14,677 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-11 13:13:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:14,678 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-11 13:13:14,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:14,679 INFO L225 Difference]: With dead ends: 83 [2020-10-11 13:13:14,679 INFO L226 Difference]: Without dead ends: 77 [2020-10-11 13:13:14,680 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:13:14,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-11 13:13:14,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-11 13:13:14,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 13:13:14,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-11 13:13:14,683 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-11 13:13:14,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:14,684 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-11 13:13:14,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:14,684 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-11 13:13:14,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:14,684 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:14,684 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:14,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:14,893 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:14,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:14,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-11 13:13:14,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:14,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438807416] [2020-10-11 13:13:14,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:14,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438807416] [2020-10-11 13:13:14,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202544718] [2020-10-11 13:13:14,960 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 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 [2020-10-11 13:13:15,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:15,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:15,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:15,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:15,028 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:15,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:15,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 13:13:15,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674482836] [2020-10-11 13:13:15,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:15,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:15,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:15,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:15,042 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-11 13:13:15,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:15,362 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-11 13:13:15,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:13:15,363 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-11 13:13:15,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:15,363 INFO L225 Difference]: With dead ends: 64 [2020-10-11 13:13:15,363 INFO L226 Difference]: Without dead ends: 56 [2020-10-11 13:13:15,364 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:13:15,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-11 13:13:15,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-10-11 13:13:15,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-11 13:13:15,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-11 13:13:15,366 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-11 13:13:15,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:15,366 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-11 13:13:15,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:15,366 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-11 13:13:15,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:15,367 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:15,368 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:15,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-11 13:13:15,575 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:15,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:15,575 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-11 13:13:15,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:15,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81762765] [2020-10-11 13:13:15,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:15,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81762765] [2020-10-11 13:13:15,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973073967] [2020-10-11 13:13:15,642 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 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 [2020-10-11 13:13:15,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 13:13:15,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:15,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:15,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:15,702 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:15,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:15,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 13:13:15,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548215547] [2020-10-11 13:13:15,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:15,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:15,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:15,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:15,722 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-11 13:13:15,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:15,986 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-11 13:13:15,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:15,987 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-11 13:13:15,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:15,987 INFO L225 Difference]: With dead ends: 68 [2020-10-11 13:13:15,987 INFO L226 Difference]: Without dead ends: 63 [2020-10-11 13:13:15,988 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:13:15,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-11 13:13:15,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-11 13:13:15,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 13:13:15,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-11 13:13:15,992 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-11 13:13:15,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:15,993 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-11 13:13:15,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:15,993 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-11 13:13:15,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:15,994 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:15,994 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:16,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-11 13:13:16,201 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:16,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:16,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-11 13:13:16,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:16,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259367464] [2020-10-11 13:13:16,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:16,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259367464] [2020-10-11 13:13:16,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629127049] [2020-10-11 13:13:16,291 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 [2020-10-11 13:13:16,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:16,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:16,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:16,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:16,354 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:16,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:16,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:16,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418317571] [2020-10-11 13:13:16,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:16,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:16,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:16,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:16,370 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-11 13:13:16,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:16,657 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-11 13:13:16,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:16,657 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:16,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:16,658 INFO L225 Difference]: With dead ends: 60 [2020-10-11 13:13:16,658 INFO L226 Difference]: Without dead ends: 55 [2020-10-11 13:13:16,659 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:13:16,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-11 13:13:16,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-11 13:13:16,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 13:13:16,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-11 13:13:16,663 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-11 13:13:16,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:16,663 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-11 13:13:16,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:16,663 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-11 13:13:16,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:16,664 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:16,664 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:16,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:16,874 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:16,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:16,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-11 13:13:16,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:16,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407496110] [2020-10-11 13:13:16,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:16,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:16,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407496110] [2020-10-11 13:13:16,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104208583] [2020-10-11 13:13:16,968 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 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 [2020-10-11 13:13:17,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 13:13:17,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:17,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:17,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:17,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:17,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-11 13:13:17,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682618588] [2020-10-11 13:13:17,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:17,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:17,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:17,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:17,041 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-11 13:13:17,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:17,170 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-11 13:13:17,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:17,173 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-11 13:13:17,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:17,174 INFO L225 Difference]: With dead ends: 66 [2020-10-11 13:13:17,174 INFO L226 Difference]: Without dead ends: 60 [2020-10-11 13:13:17,174 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:13:17,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-11 13:13:17,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-11 13:13:17,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:13:17,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-11 13:13:17,176 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-11 13:13:17,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:17,176 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-11 13:13:17,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:17,177 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-11 13:13:17,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:17,177 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:17,177 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:17,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:17,381 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:17,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:17,381 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-11 13:13:17,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:17,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694996777] [2020-10-11 13:13:17,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:17,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694996777] [2020-10-11 13:13:17,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461442816] [2020-10-11 13:13:17,475 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 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 [2020-10-11 13:13:17,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 13:13:17,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:17,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:17,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:17,539 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:17,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:17,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:17,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856189372] [2020-10-11 13:13:17,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:17,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:17,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:17,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:17,557 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-11 13:13:17,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:17,729 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-11 13:13:17,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 13:13:17,730 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:17,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:17,730 INFO L225 Difference]: With dead ends: 74 [2020-10-11 13:13:17,731 INFO L226 Difference]: Without dead ends: 68 [2020-10-11 13:13:17,732 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:13:17,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-11 13:13:17,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-11 13:13:17,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-11 13:13:17,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-11 13:13:17,735 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-11 13:13:17,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:17,735 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-11 13:13:17,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:17,736 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-11 13:13:17,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:17,736 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:17,736 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:17,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-11 13:13:17,945 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:17,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:17,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-11 13:13:17,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:17,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436968872] [2020-10-11 13:13:17,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:18,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436968872] [2020-10-11 13:13:18,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95316424] [2020-10-11 13:13:18,021 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 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 [2020-10-11 13:13:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:18,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:18,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:18,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:18,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-11 13:13:18,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649490321] [2020-10-11 13:13:18,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:18,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:18,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:18,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:18,077 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-11 13:13:18,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:18,297 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-11 13:13:18,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:18,297 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-11 13:13:18,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:18,298 INFO L225 Difference]: With dead ends: 75 [2020-10-11 13:13:18,298 INFO L226 Difference]: Without dead ends: 69 [2020-10-11 13:13:18,299 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:13:18,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-11 13:13:18,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-11 13:13:18,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-11 13:13:18,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-11 13:13:18,301 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-11 13:13:18,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:18,302 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-11 13:13:18,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:18,302 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-11 13:13:18,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:18,302 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:18,302 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:18,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:18,510 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:18,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:18,511 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-11 13:13:18,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:18,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588504426] [2020-10-11 13:13:18,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:18,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:18,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588504426] [2020-10-11 13:13:18,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723345253] [2020-10-11 13:13:18,591 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 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 [2020-10-11 13:13:18,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:18,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:18,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:18,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:18,667 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:18,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:18,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:18,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619886074] [2020-10-11 13:13:18,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:18,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:18,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:18,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:18,679 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-11 13:13:18,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:18,913 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-11 13:13:18,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:18,914 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:18,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:18,915 INFO L225 Difference]: With dead ends: 79 [2020-10-11 13:13:18,915 INFO L226 Difference]: Without dead ends: 73 [2020-10-11 13:13:18,915 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:13:18,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-11 13:13:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-11 13:13:18,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:13:18,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-11 13:13:18,918 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-11 13:13:18,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:18,919 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-11 13:13:18,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:18,919 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-11 13:13:18,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:18,919 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:18,919 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:19,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-11 13:13:19,120 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:19,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:19,121 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-11 13:13:19,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:19,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810132999] [2020-10-11 13:13:19,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:19,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810132999] [2020-10-11 13:13:19,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608915683] [2020-10-11 13:13:19,189 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 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 [2020-10-11 13:13:19,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 13:13:19,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:19,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:19,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:19,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:19,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-11 13:13:19,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335339572] [2020-10-11 13:13:19,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:19,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:19,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:19,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:19,247 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-11 13:13:19,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:19,492 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-11 13:13:19,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:13:19,495 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-11 13:13:19,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:19,496 INFO L225 Difference]: With dead ends: 79 [2020-10-11 13:13:19,496 INFO L226 Difference]: Without dead ends: 73 [2020-10-11 13:13:19,497 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:13:19,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-11 13:13:19,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-11 13:13:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-11 13:13:19,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-11 13:13:19,499 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-11 13:13:19,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:19,499 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-11 13:13:19,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:19,499 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-11 13:13:19,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:19,500 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:19,500 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:19,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:19,708 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:19,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:19,708 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-11 13:13:19,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:19,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634133640] [2020-10-11 13:13:19,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:19,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634133640] [2020-10-11 13:13:19,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546719283] [2020-10-11 13:13:19,779 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 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 [2020-10-11 13:13:19,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:19,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:19,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:19,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:19,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:19,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:19,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:19,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107891047] [2020-10-11 13:13:19,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:19,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:19,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:19,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:19,881 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-11 13:13:20,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:20,275 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-11 13:13:20,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:13:20,276 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:20,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:20,277 INFO L225 Difference]: With dead ends: 76 [2020-10-11 13:13:20,277 INFO L226 Difference]: Without dead ends: 70 [2020-10-11 13:13:20,277 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:13:20,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-11 13:13:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-11 13:13:20,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 13:13:20,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-11 13:13:20,281 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-11 13:13:20,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:20,282 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-11 13:13:20,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:20,282 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-11 13:13:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:20,283 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:20,283 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:20,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-11 13:13:20,484 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:20,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:20,484 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-11 13:13:20,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:20,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303257409] [2020-10-11 13:13:20,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:20,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:20,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303257409] [2020-10-11 13:13:20,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911280861] [2020-10-11 13:13:20,567 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 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 [2020-10-11 13:13:20,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 13:13:20,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:20,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:20,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:20,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:20,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-11 13:13:20,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261194211] [2020-10-11 13:13:20,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:20,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:20,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:20,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:20,678 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-11 13:13:20,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:20,954 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-11 13:13:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:20,955 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-11 13:13:20,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:20,956 INFO L225 Difference]: With dead ends: 96 [2020-10-11 13:13:20,956 INFO L226 Difference]: Without dead ends: 90 [2020-10-11 13:13:20,956 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:13:20,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-11 13:13:20,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-11 13:13:20,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:13:20,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-11 13:13:20,959 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-11 13:13:20,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:20,960 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-11 13:13:20,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:20,960 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-11 13:13:20,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:20,960 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:20,960 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:21,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-11 13:13:21,170 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:21,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:21,170 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-11 13:13:21,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:21,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60966424] [2020-10-11 13:13:21,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:21,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60966424] [2020-10-11 13:13:21,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904865313] [2020-10-11 13:13:21,233 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 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 [2020-10-11 13:13:21,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 13:13:21,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:21,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:21,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:21,298 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:21,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:21,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:21,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944122475] [2020-10-11 13:13:21,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:21,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:21,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:21,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:21,308 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-11 13:13:21,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:21,646 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-11 13:13:21,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:13:21,647 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:21,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:21,647 INFO L225 Difference]: With dead ends: 77 [2020-10-11 13:13:21,647 INFO L226 Difference]: Without dead ends: 69 [2020-10-11 13:13:21,648 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:13:21,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-11 13:13:21,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-11 13:13:21,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-11 13:13:21,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-11 13:13:21,649 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-11 13:13:21,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:21,650 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-11 13:13:21,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:21,650 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-11 13:13:21,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:21,650 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:21,650 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:21,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-11 13:13:21,851 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:21,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:21,851 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-11 13:13:21,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:21,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63864830] [2020-10-11 13:13:21,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:21,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63864830] [2020-10-11 13:13:21,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666163342] [2020-10-11 13:13:21,948 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 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 [2020-10-11 13:13:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:21,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:21,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:22,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:22,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 13:13:22,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181422535] [2020-10-11 13:13:22,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:22,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:22,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:22,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:22,016 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-11 13:13:22,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:22,205 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-11 13:13:22,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 13:13:22,205 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-11 13:13:22,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:22,207 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:13:22,208 INFO L226 Difference]: Without dead ends: 78 [2020-10-11 13:13:22,208 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:13:22,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-11 13:13:22,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-11 13:13:22,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:13:22,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-11 13:13:22,211 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-11 13:13:22,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:22,211 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-11 13:13:22,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:22,212 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-11 13:13:22,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:22,213 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:22,214 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:22,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-11 13:13:22,415 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:22,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:22,416 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-11 13:13:22,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:22,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933031264] [2020-10-11 13:13:22,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:22,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933031264] [2020-10-11 13:13:22,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282364050] [2020-10-11 13:13:22,513 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 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 [2020-10-11 13:13:22,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:22,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:22,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:22,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:22,569 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:22,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:22,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:13:22,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622437296] [2020-10-11 13:13:22,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:22,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:22,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:22,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:22,585 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-11 13:13:22,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:22,834 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-11 13:13:22,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:22,834 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:13:22,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:22,835 INFO L225 Difference]: With dead ends: 81 [2020-10-11 13:13:22,835 INFO L226 Difference]: Without dead ends: 75 [2020-10-11 13:13:22,836 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:13:22,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-11 13:13:22,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-11 13:13:22,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:13:22,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-11 13:13:22,839 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-11 13:13:22,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:22,839 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-11 13:13:22,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:22,840 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-11 13:13:22,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:22,840 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:22,840 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:23,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-11 13:13:23,049 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:23,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:23,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-11 13:13:23,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:23,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759096158] [2020-10-11 13:13:23,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:23,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759096158] [2020-10-11 13:13:23,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583384627] [2020-10-11 13:13:23,132 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 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 [2020-10-11 13:13:23,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 13:13:23,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:23,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:23,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:23,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:23,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:23,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 13:13:23,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031279737] [2020-10-11 13:13:23,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:23,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:23,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:23,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:23,196 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-11 13:13:23,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:23,423 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-11 13:13:23,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:23,424 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-11 13:13:23,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:23,425 INFO L225 Difference]: With dead ends: 78 [2020-10-11 13:13:23,425 INFO L226 Difference]: Without dead ends: 72 [2020-10-11 13:13:23,425 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:13:23,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-11 13:13:23,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-11 13:13:23,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:13:23,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-11 13:13:23,430 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-11 13:13:23,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:23,431 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-11 13:13:23,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:23,432 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-11 13:13:23,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:23,432 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:23,432 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:23,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-11 13:13:23,641 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:23,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:23,641 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-11 13:13:23,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:23,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498211772] [2020-10-11 13:13:23,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:23,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:23,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498211772] [2020-10-11 13:13:23,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963216301] [2020-10-11 13:13:23,725 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 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 [2020-10-11 13:13:23,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:23,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:23,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:23,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:23,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:23,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:23,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:13:23,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463609533] [2020-10-11 13:13:23,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:23,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:23,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:23,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:23,805 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-11 13:13:24,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:24,118 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-11 13:13:24,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:13:24,118 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:13:24,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:24,119 INFO L225 Difference]: With dead ends: 77 [2020-10-11 13:13:24,119 INFO L226 Difference]: Without dead ends: 71 [2020-10-11 13:13:24,119 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:13:24,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-11 13:13:24,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-11 13:13:24,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:13:24,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-11 13:13:24,123 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-11 13:13:24,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:24,123 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-11 13:13:24,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:24,123 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-11 13:13:24,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:24,123 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:24,124 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:24,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-11 13:13:24,330 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:24,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:24,331 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-11 13:13:24,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:24,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084733538] [2020-10-11 13:13:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:24,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:24,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084733538] [2020-10-11 13:13:24,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785943638] [2020-10-11 13:13:24,409 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 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 [2020-10-11 13:13:24,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 13:13:24,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:24,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:24,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:24,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:24,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 13:13:24,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989661715] [2020-10-11 13:13:24,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:24,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:24,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:24,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:24,471 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-11 13:13:24,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:24,799 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-11 13:13:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:13:24,800 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-11 13:13:24,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:24,801 INFO L225 Difference]: With dead ends: 74 [2020-10-11 13:13:24,801 INFO L226 Difference]: Without dead ends: 68 [2020-10-11 13:13:24,802 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:13:24,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-11 13:13:24,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-11 13:13:24,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:13:24,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-11 13:13:24,806 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-11 13:13:24,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:24,809 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-11 13:13:24,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:24,809 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-11 13:13:24,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:24,810 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:24,810 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:25,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:25,011 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:25,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:25,011 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-11 13:13:25,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:25,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900673502] [2020-10-11 13:13:25,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:25,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900673502] [2020-10-11 13:13:25,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834816514] [2020-10-11 13:13:25,120 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 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 [2020-10-11 13:13:25,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 13:13:25,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:25,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:25,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:25,223 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:25,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:25,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:13:25,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087391394] [2020-10-11 13:13:25,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:25,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:25,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:25,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:25,241 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-11 13:13:25,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:25,729 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-11 13:13:25,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:13:25,730 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:13:25,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:25,731 INFO L225 Difference]: With dead ends: 73 [2020-10-11 13:13:25,731 INFO L226 Difference]: Without dead ends: 67 [2020-10-11 13:13:25,732 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:13:25,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-11 13:13:25,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-11 13:13:25,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:13:25,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-11 13:13:25,738 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-11 13:13:25,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:25,739 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-11 13:13:25,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:25,739 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-11 13:13:25,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:25,740 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:25,740 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:25,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-11 13:13:25,949 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:25,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:25,950 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-11 13:13:25,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:25,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299980172] [2020-10-11 13:13:25,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:26,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:26,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299980172] [2020-10-11 13:13:26,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944117084] [2020-10-11 13:13:26,022 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 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 [2020-10-11 13:13:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:26,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:26,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:26,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:26,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 13:13:26,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290199543] [2020-10-11 13:13:26,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:26,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:26,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:26,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:26,080 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-11 13:13:26,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:26,364 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-11 13:13:26,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:26,365 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-11 13:13:26,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:26,366 INFO L225 Difference]: With dead ends: 89 [2020-10-11 13:13:26,366 INFO L226 Difference]: Without dead ends: 83 [2020-10-11 13:13:26,367 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:13:26,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-11 13:13:26,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-11 13:13:26,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-11 13:13:26,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-11 13:13:26,370 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-11 13:13:26,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:26,370 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-11 13:13:26,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:26,370 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-11 13:13:26,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:26,371 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:26,371 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:26,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:26,580 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:26,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:26,580 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-11 13:13:26,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:26,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793717568] [2020-10-11 13:13:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:26,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793717568] [2020-10-11 13:13:26,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759335762] [2020-10-11 13:13:26,652 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 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 [2020-10-11 13:13:26,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:26,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:26,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:26,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:26,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:26,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:13:26,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584515391] [2020-10-11 13:13:26,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:26,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:26,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:26,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:26,718 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-11 13:13:27,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:27,123 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-10-11 13:13:27,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:13:27,124 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:13:27,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:27,125 INFO L225 Difference]: With dead ends: 68 [2020-10-11 13:13:27,125 INFO L226 Difference]: Without dead ends: 60 [2020-10-11 13:13:27,126 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:13:27,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-11 13:13:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-10-11 13:13:27,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-11 13:13:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-11 13:13:27,128 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-11 13:13:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:27,128 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-11 13:13:27,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:27,129 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-11 13:13:27,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:13:27,130 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:27,130 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:27,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-11 13:13:27,331 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:27,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:27,331 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-11 13:13:27,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:27,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184384589] [2020-10-11 13:13:27,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:27,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184384589] [2020-10-11 13:13:27,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059152579] [2020-10-11 13:13:27,431 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 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 [2020-10-11 13:13:27,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 13:13:27,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:27,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:13:27,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:27,525 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:27,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:27,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:13:27,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274861055] [2020-10-11 13:13:27,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:27,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:27,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:27,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:27,544 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-11 13:13:28,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:28,085 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-11 13:13:28,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:28,086 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:13:28,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:28,087 INFO L225 Difference]: With dead ends: 76 [2020-10-11 13:13:28,087 INFO L226 Difference]: Without dead ends: 71 [2020-10-11 13:13:28,088 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:13:28,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-11 13:13:28,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-11 13:13:28,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:13:28,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-11 13:13:28,091 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-11 13:13:28,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:28,092 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-11 13:13:28,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:28,092 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-11 13:13:28,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:28,093 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:28,093 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:28,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:28,302 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:28,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:28,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-11 13:13:28,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:28,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436422570] [2020-10-11 13:13:28,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:28,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436422570] [2020-10-11 13:13:28,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222607243] [2020-10-11 13:13:28,393 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 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 [2020-10-11 13:13:28,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:28,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:28,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:28,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:28,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:28,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:28,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:28,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:28,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143294162] [2020-10-11 13:13:28,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:28,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:28,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:28,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:28,480 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-11 13:13:28,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:28,861 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-11 13:13:28,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:28,863 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:28,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:28,864 INFO L225 Difference]: With dead ends: 66 [2020-10-11 13:13:28,864 INFO L226 Difference]: Without dead ends: 61 [2020-10-11 13:13:28,864 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:13:28,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-11 13:13:28,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-11 13:13:28,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-11 13:13:28,866 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-11 13:13:28,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:28,867 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-11 13:13:28,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:28,867 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-11 13:13:28,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:28,867 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:28,867 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:29,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-11 13:13:29,076 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:29,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:29,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-11 13:13:29,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:29,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848168225] [2020-10-11 13:13:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:29,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848168225] [2020-10-11 13:13:29,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491347112] [2020-10-11 13:13:29,176 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 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 [2020-10-11 13:13:29,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 13:13:29,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:29,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:29,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:29,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:29,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:13:29,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120743002] [2020-10-11 13:13:29,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:29,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:29,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:29,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:29,263 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-11 13:13:29,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:29,414 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-11 13:13:29,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 13:13:29,415 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:13:29,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:29,416 INFO L225 Difference]: With dead ends: 72 [2020-10-11 13:13:29,416 INFO L226 Difference]: Without dead ends: 66 [2020-10-11 13:13:29,416 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:13:29,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-11 13:13:29,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-11 13:13:29,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 13:13:29,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-11 13:13:29,418 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-11 13:13:29,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:29,419 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-11 13:13:29,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:29,419 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-11 13:13:29,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:29,419 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:29,419 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:29,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-11 13:13:29,627 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:29,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:29,627 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-11 13:13:29,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:29,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894506564] [2020-10-11 13:13:29,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:29,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:29,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894506564] [2020-10-11 13:13:29,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721184464] [2020-10-11 13:13:29,736 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 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 [2020-10-11 13:13:29,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 13:13:29,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:29,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:29,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:29,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:29,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:29,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:29,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255215485] [2020-10-11 13:13:29,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:29,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:29,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:29,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:29,815 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-11 13:13:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:30,040 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-11 13:13:30,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:30,041 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:30,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:30,041 INFO L225 Difference]: With dead ends: 82 [2020-10-11 13:13:30,042 INFO L226 Difference]: Without dead ends: 76 [2020-10-11 13:13:30,042 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:13:30,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-11 13:13:30,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-11 13:13:30,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 13:13:30,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-11 13:13:30,045 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-11 13:13:30,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:30,045 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-11 13:13:30,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:30,045 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-11 13:13:30,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:30,045 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:30,046 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:30,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-11 13:13:30,247 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:30,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:30,247 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-11 13:13:30,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:30,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907489331] [2020-10-11 13:13:30,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:30,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907489331] [2020-10-11 13:13:30,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966654062] [2020-10-11 13:13:30,347 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 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 [2020-10-11 13:13:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:30,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:30,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:30,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:30,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:13:30,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317756453] [2020-10-11 13:13:30,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:30,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:30,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:30,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:30,428 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-11 13:13:30,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:30,702 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-11 13:13:30,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:13:30,702 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:13:30,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:30,703 INFO L225 Difference]: With dead ends: 83 [2020-10-11 13:13:30,703 INFO L226 Difference]: Without dead ends: 77 [2020-10-11 13:13:30,703 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:13:30,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-11 13:13:30,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-11 13:13:30,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-11 13:13:30,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-11 13:13:30,706 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-11 13:13:30,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:30,706 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-11 13:13:30,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-11 13:13:30,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:30,707 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:30,707 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:30,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-11 13:13:30,913 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:30,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:30,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-11 13:13:30,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:30,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127262026] [2020-10-11 13:13:30,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:31,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127262026] [2020-10-11 13:13:31,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590266774] [2020-10-11 13:13:31,039 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 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 [2020-10-11 13:13:31,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:31,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:31,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:31,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:31,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:31,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:31,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:31,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83391416] [2020-10-11 13:13:31,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:31,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:31,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:31,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:31,113 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-11 13:13:31,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:31,388 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-11 13:13:31,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:13:31,392 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:31,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:31,393 INFO L225 Difference]: With dead ends: 89 [2020-10-11 13:13:31,393 INFO L226 Difference]: Without dead ends: 83 [2020-10-11 13:13:31,393 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:13:31,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-11 13:13:31,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-11 13:13:31,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 13:13:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-11 13:13:31,396 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-11 13:13:31,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:31,396 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-11 13:13:31,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:31,396 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-11 13:13:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:31,397 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:31,397 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:31,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:31,606 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:31,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:31,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-11 13:13:31,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:31,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475451417] [2020-10-11 13:13:31,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:31,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475451417] [2020-10-11 13:13:31,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623143524] [2020-10-11 13:13:31,690 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 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 [2020-10-11 13:13:31,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-11 13:13:31,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:31,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:31,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:31,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:31,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:13:31,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185630553] [2020-10-11 13:13:31,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:31,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:31,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:31,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:31,747 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-11 13:13:32,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:32,020 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-11 13:13:32,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:13:32,020 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:13:32,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:32,021 INFO L225 Difference]: With dead ends: 89 [2020-10-11 13:13:32,022 INFO L226 Difference]: Without dead ends: 83 [2020-10-11 13:13:32,022 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:13:32,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-11 13:13:32,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-11 13:13:32,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:13:32,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-11 13:13:32,025 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-11 13:13:32,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:32,025 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-11 13:13:32,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:32,026 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-11 13:13:32,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:32,026 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:32,026 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:32,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:32,236 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:32,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:32,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-11 13:13:32,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:32,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172754094] [2020-10-11 13:13:32,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:32,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:32,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172754094] [2020-10-11 13:13:32,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653473615] [2020-10-11 13:13:32,320 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 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 [2020-10-11 13:13:32,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:32,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:32,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:32,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:32,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:32,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:32,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:32,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348946609] [2020-10-11 13:13:32,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:32,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:32,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:32,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:32,411 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-11 13:13:32,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:32,767 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-11 13:13:32,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:13:32,768 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:32,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:32,769 INFO L225 Difference]: With dead ends: 86 [2020-10-11 13:13:32,769 INFO L226 Difference]: Without dead ends: 80 [2020-10-11 13:13:32,769 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:13:32,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-11 13:13:32,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-11 13:13:32,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:13:32,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-11 13:13:32,772 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-11 13:13:32,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:32,772 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-11 13:13:32,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:32,773 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-11 13:13:32,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:32,773 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:32,773 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:32,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-11 13:13:32,983 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:32,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:32,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-11 13:13:32,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:32,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017652608] [2020-10-11 13:13:32,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:33,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017652608] [2020-10-11 13:13:33,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057550037] [2020-10-11 13:13:33,072 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 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 [2020-10-11 13:13:33,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 13:13:33,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:33,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:33,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:33,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:33,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:13:33,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327768629] [2020-10-11 13:13:33,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:33,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:33,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:33,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:33,147 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-11 13:13:33,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:33,479 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-11 13:13:33,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:13:33,479 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:13:33,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:33,480 INFO L225 Difference]: With dead ends: 87 [2020-10-11 13:13:33,480 INFO L226 Difference]: Without dead ends: 81 [2020-10-11 13:13:33,480 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:13:33,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-11 13:13:33,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-11 13:13:33,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-11 13:13:33,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-11 13:13:33,483 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-11 13:13:33,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:33,483 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-11 13:13:33,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:33,483 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-11 13:13:33,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:33,484 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:33,484 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:33,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:33,692 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:33,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:33,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-11 13:13:33,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:33,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529449064] [2020-10-11 13:13:33,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:33,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529449064] [2020-10-11 13:13:33,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000223436] [2020-10-11 13:13:33,793 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 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 [2020-10-11 13:13:33,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 13:13:33,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:33,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:33,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:33,866 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:33,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:33,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:33,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871281902] [2020-10-11 13:13:33,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:33,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:33,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:33,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:33,881 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-11 13:13:34,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:34,283 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-11 13:13:34,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:13:34,289 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:34,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:34,290 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:13:34,290 INFO L226 Difference]: Without dead ends: 78 [2020-10-11 13:13:34,291 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:13:34,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-11 13:13:34,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-11 13:13:34,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:13:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-11 13:13:34,293 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-11 13:13:34,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:34,293 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-11 13:13:34,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:34,293 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-11 13:13:34,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:34,294 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:34,294 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:34,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-11 13:13:34,501 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:34,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:34,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-11 13:13:34,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:34,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765244403] [2020-10-11 13:13:34,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:34,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765244403] [2020-10-11 13:13:34,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486988570] [2020-10-11 13:13:34,581 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 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 [2020-10-11 13:13:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:34,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:34,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:34,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:34,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:13:34,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395178256] [2020-10-11 13:13:34,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:13:34,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:34,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:13:34,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:13:34,640 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-11 13:13:34,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:34,994 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-11 13:13:34,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:13:34,995 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:13:34,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:34,996 INFO L225 Difference]: With dead ends: 104 [2020-10-11 13:13:34,996 INFO L226 Difference]: Without dead ends: 98 [2020-10-11 13:13:34,996 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:13:34,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-11 13:13:34,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-11 13:13:34,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-11 13:13:34,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-11 13:13:34,998 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-11 13:13:34,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:34,999 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-11 13:13:34,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:13:34,999 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-11 13:13:34,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:13:34,999 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:34,999 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:35,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-11 13:13:35,200 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:35,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:35,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-11 13:13:35,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:35,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206560249] [2020-10-11 13:13:35,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:35,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206560249] [2020-10-11 13:13:35,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626735128] [2020-10-11 13:13:35,284 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 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 [2020-10-11 13:13:35,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:35,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:35,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:13:35,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:35,354 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:35,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:35,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:13:35,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517834252] [2020-10-11 13:13:35,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:13:35,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:35,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:13:35,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:13:35,365 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-11 13:13:35,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:35,830 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-11 13:13:35,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:13:35,830 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:13:35,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:35,831 INFO L225 Difference]: With dead ends: 85 [2020-10-11 13:13:35,831 INFO L226 Difference]: Without dead ends: 77 [2020-10-11 13:13:35,832 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 13:13:35,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-11 13:13:35,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-11 13:13:35,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-11 13:13:35,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-11 13:13:35,835 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-11 13:13:35,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:35,835 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-11 13:13:35,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:13:35,835 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-11 13:13:35,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:13:35,836 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:35,836 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:36,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-11 13:13:36,039 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:36,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:36,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-11 13:13:36,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:36,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865395426] [2020-10-11 13:13:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 13:13:36,049 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 13:13:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-11 13:13:36,075 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-11 13:13:36,125 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-11 13:13:36,126 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-11 13:13:36,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-11 13:13:36,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 01:13:36 BasicIcfg [2020-10-11 13:13:36,237 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-11 13:13:36,238 INFO L168 Benchmark]: Toolchain (without parser) took 36770.41 ms. Allocated memory was 251.1 MB in the beginning and 574.6 MB in the end (delta: 323.5 MB). Free memory was 207.5 MB in the beginning and 221.3 MB in the end (delta: -13.9 MB). Peak memory consumption was 309.6 MB. Max. memory is 14.2 GB. [2020-10-11 13:13:36,239 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 251.1 MB. Free memory is still 227.5 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 13:13:36,242 INFO L168 Benchmark]: CACSL2BoogieTranslator took 671.32 ms. Allocated memory was 251.1 MB in the beginning and 312.5 MB in the end (delta: 61.3 MB). Free memory was 207.5 MB in the beginning and 267.9 MB in the end (delta: -60.4 MB). Peak memory consumption was 33.5 MB. Max. memory is 14.2 GB. [2020-10-11 13:13:36,243 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.63 ms. Allocated memory is still 312.5 MB. Free memory is still 267.9 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 13:13:36,243 INFO L168 Benchmark]: Boogie Preprocessor took 26.65 ms. Allocated memory is still 312.5 MB. Free memory was 267.9 MB in the beginning and 265.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 13:13:36,243 INFO L168 Benchmark]: RCFGBuilder took 361.62 ms. Allocated memory is still 312.5 MB. Free memory was 265.4 MB in the beginning and 245.8 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 14.2 GB. [2020-10-11 13:13:36,244 INFO L168 Benchmark]: TraceAbstraction took 35658.74 ms. Allocated memory was 312.5 MB in the beginning and 574.6 MB in the end (delta: 262.1 MB). Free memory was 243.3 MB in the beginning and 221.3 MB in the end (delta: 22.0 MB). Peak memory consumption was 284.1 MB. Max. memory is 14.2 GB. [2020-10-11 13:13:36,245 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 251.1 MB. Free memory is still 227.5 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 671.32 ms. Allocated memory was 251.1 MB in the beginning and 312.5 MB in the end (delta: 61.3 MB). Free memory was 207.5 MB in the beginning and 267.9 MB in the end (delta: -60.4 MB). Peak memory consumption was 33.5 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 46.63 ms. Allocated memory is still 312.5 MB. Free memory is still 267.9 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 26.65 ms. Allocated memory is still 312.5 MB. Free memory was 267.9 MB in the beginning and 265.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 361.62 ms. Allocated memory is still 312.5 MB. Free memory was 265.4 MB in the beginning and 245.8 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 14.2 GB. * TraceAbstraction took 35658.74 ms. Allocated memory was 312.5 MB in the beginning and 574.6 MB in the end (delta: 262.1 MB). Free memory was 243.3 MB in the beginning and 221.3 MB in the end (delta: 22.0 MB). Peak memory consumption was 284.1 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 618 VarBasedMoverChecksPositive, 16 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.3s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; [L693] 0 pthread_t id1, id2; [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L697] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L700] 0 int condJ = j >= (2*5 +6); [L702] COND TRUE 0 condI || condJ [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 35.4s, OverallIterations: 59, TraceHistogramMax: 5, AutomataDifference: 13.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 901 SDtfs, 2428 SDslu, 3534 SDs, 0 SdLazy, 3810 SolverSat, 1596 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1778 GetRequests, 634 SyntacticMatches, 53 SemanticMatches, 1091 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4729 ImplicationChecksByTransitivity, 12.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 58 MinimizatonAttempts, 952 StatesRemovedByMinimization, 57 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 1602 NumberOfCodeBlocks, 1602 NumberOfCodeBlocksAsserted, 196 NumberOfCheckSat, 1473 ConstructedInterpolants, 0 QuantifiedInterpolants, 86797 SizeOfPredicates, 346 NumberOfNonLiveVariables, 5122 ConjunctsInSsa, 560 ConjunctsInUnsatCore, 111 InterpolantComputations, 5 PerfectInterpolantSequences, 0/900 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...