/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-bf4350c [2020-09-16 14:08:05,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-16 14:08:05,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-16 14:08:05,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-16 14:08:05,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-16 14:08:05,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-16 14:08:05,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-16 14:08:05,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-16 14:08:05,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-16 14:08:05,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-16 14:08:05,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-16 14:08:05,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-16 14:08:05,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-16 14:08:05,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-16 14:08:05,375 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-16 14:08:05,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-16 14:08:05,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-16 14:08:05,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-16 14:08:05,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-16 14:08:05,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-16 14:08:05,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-16 14:08:05,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-16 14:08:05,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-16 14:08:05,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-16 14:08:05,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-16 14:08:05,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-16 14:08:05,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-16 14:08:05,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-16 14:08:05,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-16 14:08:05,406 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-16 14:08:05,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-16 14:08:05,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-16 14:08:05,408 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-16 14:08:05,409 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-16 14:08:05,410 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-16 14:08:05,410 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-16 14:08:05,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-16 14:08:05,411 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-16 14:08:05,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-16 14:08:05,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-16 14:08:05,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-16 14:08:05,414 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 [2020-09-16 14:08:05,441 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-16 14:08:05,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-16 14:08:05,443 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-16 14:08:05,443 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-16 14:08:05,443 INFO L138 SettingsManager]: * Use SBE=true [2020-09-16 14:08:05,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-16 14:08:05,444 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-16 14:08:05,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-16 14:08:05,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-16 14:08:05,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-16 14:08:05,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-16 14:08:05,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-16 14:08:05,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-16 14:08:05,445 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-16 14:08:05,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-16 14:08:05,446 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-16 14:08:05,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-16 14:08:05,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-16 14:08:05,446 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-16 14:08:05,446 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-16 14:08:05,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-16 14:08:05,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-16 14:08:05,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-16 14:08:05,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-16 14:08:05,447 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-16 14:08:05,448 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-16 14:08:05,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-16 14:08:05,448 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-16 14:08:05,448 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-16 14:08:05,448 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-16 14:08:05,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-16 14:08:05,927 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-16 14:08:05,931 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-16 14:08:05,933 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-16 14:08:05,934 INFO L275 PluginConnector]: CDTParser initialized [2020-09-16 14:08:05,935 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2020-09-16 14:08:06,023 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff8adf484/900de5765993402d95f62c71be0c4a79/FLAG062ad7d11 [2020-09-16 14:08:06,582 INFO L306 CDTParser]: Found 1 translation units. [2020-09-16 14:08:06,583 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2020-09-16 14:08:06,597 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff8adf484/900de5765993402d95f62c71be0c4a79/FLAG062ad7d11 [2020-09-16 14:08:06,849 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff8adf484/900de5765993402d95f62c71be0c4a79 [2020-09-16 14:08:06,864 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-16 14:08:06,870 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-16 14:08:06,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-16 14:08:06,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-16 14:08:06,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-16 14:08:06,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 02:08:06" (1/1) ... [2020-09-16 14:08:06,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f50883f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:06, skipping insertion in model container [2020-09-16 14:08:06,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 02:08:06" (1/1) ... [2020-09-16 14:08:06,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-16 14:08:06,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-16 14:08:07,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-16 14:08:07,566 INFO L203 MainTranslator]: Completed pre-run [2020-09-16 14:08:07,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-16 14:08:07,717 INFO L208 MainTranslator]: Completed translation [2020-09-16 14:08:07,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07 WrapperNode [2020-09-16 14:08:07,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-16 14:08:07,719 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-16 14:08:07,719 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-16 14:08:07,720 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-16 14:08:07,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07" (1/1) ... [2020-09-16 14:08:07,750 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07" (1/1) ... [2020-09-16 14:08:07,776 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-16 14:08:07,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-16 14:08:07,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-16 14:08:07,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-16 14:08:07,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07" (1/1) ... [2020-09-16 14:08:07,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07" (1/1) ... [2020-09-16 14:08:07,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07" (1/1) ... [2020-09-16 14:08:07,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07" (1/1) ... [2020-09-16 14:08:07,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07" (1/1) ... [2020-09-16 14:08:07,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07" (1/1) ... [2020-09-16 14:08:07,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07" (1/1) ... [2020-09-16 14:08:07,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-16 14:08:07,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-16 14:08:07,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-16 14:08:07,810 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-16 14:08:07,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07" (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 [2020-09-16 14:08:07,882 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-16 14:08:07,882 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-16 14:08:07,882 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-16 14:08:07,882 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-16 14:08:07,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-16 14:08:07,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-16 14:08:07,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-16 14:08:07,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-16 14:08:07,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-16 14:08:07,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-16 14:08:07,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-16 14:08:07,886 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-16 14:08:08,248 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-16 14:08:08,249 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-16 14:08:08,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 02:08:08 BoogieIcfgContainer [2020-09-16 14:08:08,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-16 14:08:08,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-16 14:08:08,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-16 14:08:08,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-16 14:08:08,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 02:08:06" (1/3) ... [2020-09-16 14:08:08,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5027e7f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 02:08:08, skipping insertion in model container [2020-09-16 14:08:08,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07" (2/3) ... [2020-09-16 14:08:08,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5027e7f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 02:08:08, skipping insertion in model container [2020-09-16 14:08:08,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 02:08:08" (3/3) ... [2020-09-16 14:08:08,263 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2020-09-16 14:08:08,274 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-16 14:08:08,275 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-16 14:08:08,285 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-16 14:08:08,286 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-16 14:08:08,310 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,310 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,310 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,311 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,311 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,311 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,311 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,312 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,312 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,312 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,313 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,313 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,313 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,313 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,314 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,314 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,314 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,314 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,315 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,315 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,315 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,315 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,316 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,316 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,316 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,317 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,317 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,317 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,321 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,322 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,322 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,322 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,323 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,323 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,331 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,331 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,331 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,332 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,332 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,332 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,360 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-16 14:08:08,382 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-16 14:08:08,383 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-16 14:08:08,383 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-16 14:08:08,383 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-16 14:08:08,383 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-16 14:08:08,383 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-16 14:08:08,383 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-16 14:08:08,384 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-16 14:08:08,400 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-16 14:08:08,403 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-16 14:08:08,448 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-16 14:08:08,449 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-16 14:08:08,455 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. [2020-09-16 14:08:08,457 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-16 14:08:08,483 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-16 14:08:08,483 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-16 14:08:08,484 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. [2020-09-16 14:08:08,486 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-16 14:08:08,487 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-16 14:08:09,766 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-16 14:08:09,767 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-16 14:08:09,772 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-16 14:08:09,785 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-16 14:08:09,787 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-16 14:08:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-16 14:08:09,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:09,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-16 14:08:09,811 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:09,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:09,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-16 14:08:09,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:09,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596290530] [2020-09-16 14:08:09,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:10,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596290530] [2020-09-16 14:08:10,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 14:08:10,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-16 14:08:10,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014191245] [2020-09-16 14:08:10,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-16 14:08:10,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:10,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-16 14:08:10,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-16 14:08:10,136 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-16 14:08:10,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:10,210 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-16 14:08:10,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-16 14:08:10,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-16 14:08:10,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:10,227 INFO L225 Difference]: With dead ends: 75 [2020-09-16 14:08:10,227 INFO L226 Difference]: Without dead ends: 42 [2020-09-16 14:08:10,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-16 14:08:10,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-16 14:08:10,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-16 14:08:10,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-16 14:08:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-16 14:08:10,276 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-16 14:08:10,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:10,276 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-16 14:08:10,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-16 14:08:10,276 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-16 14:08:10,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-16 14:08:10,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:10,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:10,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-16 14:08:10,278 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:10,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:10,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-16 14:08:10,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:10,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567600624] [2020-09-16 14:08:10,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:10,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:10,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567600624] [2020-09-16 14:08:10,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 14:08:10,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-16 14:08:10,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562504700] [2020-09-16 14:08:10,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-16 14:08:10,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:10,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-16 14:08:10,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-16 14:08:10,384 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-16 14:08:10,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:10,414 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-16 14:08:10,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-16 14:08:10,414 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-16 14:08:10,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:10,416 INFO L225 Difference]: With dead ends: 56 [2020-09-16 14:08:10,416 INFO L226 Difference]: Without dead ends: 50 [2020-09-16 14:08:10,417 INFO L675 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 [2020-09-16 14:08:10,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-16 14:08:10,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-16 14:08:10,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-16 14:08:10,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-16 14:08:10,424 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-16 14:08:10,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:10,426 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-16 14:08:10,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-16 14:08:10,426 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-16 14:08:10,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 14:08:10,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:10,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:10,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-16 14:08:10,428 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:10,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:10,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-16 14:08:10,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:10,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809712519] [2020-09-16 14:08:10,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:10,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809712519] [2020-09-16 14:08:10,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 14:08:10,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-16 14:08:10,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499203086] [2020-09-16 14:08:10,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 14:08:10,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:10,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 14:08:10,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-16 14:08:10,571 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-16 14:08:10,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:10,652 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-16 14:08:10,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 14:08:10,653 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-16 14:08:10,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:10,655 INFO L225 Difference]: With dead ends: 78 [2020-09-16 14:08:10,655 INFO L226 Difference]: Without dead ends: 71 [2020-09-16 14:08:10,655 INFO L675 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 [2020-09-16 14:08:10,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-16 14:08:10,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-16 14:08:10,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-16 14:08:10,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-16 14:08:10,664 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-16 14:08:10,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:10,664 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-16 14:08:10,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 14:08:10,665 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-16 14:08:10,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 14:08:10,666 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:10,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:10,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-16 14:08:10,666 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:10,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:10,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-16 14:08:10,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:10,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570659286] [2020-09-16 14:08:10,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:10,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570659286] [2020-09-16 14:08:10,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 14:08:10,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-16 14:08:10,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468146559] [2020-09-16 14:08:10,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 14:08:10,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:10,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 14:08:10,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-16 14:08:10,748 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-16 14:08:10,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:10,822 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-16 14:08:10,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-16 14:08:10,823 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-16 14:08:10,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:10,824 INFO L225 Difference]: With dead ends: 54 [2020-09-16 14:08:10,824 INFO L226 Difference]: Without dead ends: 43 [2020-09-16 14:08:10,825 INFO L675 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 [2020-09-16 14:08:10,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-16 14:08:10,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-16 14:08:10,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-16 14:08:10,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-16 14:08:10,830 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-16 14:08:10,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:10,831 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-16 14:08:10,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 14:08:10,831 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-16 14:08:10,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 14:08:10,832 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:10,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:10,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-16 14:08:10,832 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:10,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:10,833 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-16 14:08:10,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:10,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553118355] [2020-09-16 14:08:10,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:10,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553118355] [2020-09-16 14:08:10,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 14:08:10,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-16 14:08:10,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663485540] [2020-09-16 14:08:10,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 14:08:10,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:10,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 14:08:10,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-16 14:08:10,907 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-16 14:08:10,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:10,985 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-16 14:08:10,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-16 14:08:10,986 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-16 14:08:10,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:10,987 INFO L225 Difference]: With dead ends: 57 [2020-09-16 14:08:10,987 INFO L226 Difference]: Without dead ends: 51 [2020-09-16 14:08:10,988 INFO L675 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 [2020-09-16 14:08:10,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-16 14:08:10,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-16 14:08:10,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-16 14:08:10,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-16 14:08:10,994 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-16 14:08:10,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:10,995 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-16 14:08:10,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 14:08:10,995 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-16 14:08:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 14:08:10,996 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:10,996 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:10,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-16 14:08:10,997 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:10,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:10,997 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-16 14:08:10,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:10,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545226979] [2020-09-16 14:08:10,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:11,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545226979] [2020-09-16 14:08:11,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056744680] [2020-09-16 14:08:11,068 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 [2020-09-16 14:08:11,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:11,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:11,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 14:08:11,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:11,190 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:11,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:11,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-16 14:08:11,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153972272] [2020-09-16 14:08:11,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-16 14:08:11,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:11,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-16 14:08:11,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-16 14:08:11,211 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-16 14:08:11,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:11,340 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-16 14:08:11,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 14:08:11,340 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-16 14:08:11,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:11,341 INFO L225 Difference]: With dead ends: 48 [2020-09-16 14:08:11,341 INFO L226 Difference]: Without dead ends: 43 [2020-09-16 14:08:11,342 INFO L675 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 [2020-09-16 14:08:11,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-16 14:08:11,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-16 14:08:11,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-16 14:08:11,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-16 14:08:11,351 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-16 14:08:11,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:11,351 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-16 14:08:11,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-16 14:08:11,351 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-16 14:08:11,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 14:08:11,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:11,353 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:11,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-16 14:08:11,556 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:11,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:11,557 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-16 14:08:11,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:11,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989921208] [2020-09-16 14:08:11,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:11,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989921208] [2020-09-16 14:08:11,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373792971] [2020-09-16 14:08:11,648 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 [2020-09-16 14:08:11,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:11,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:11,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 14:08:11,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:11,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:11,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-16 14:08:11,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858968239] [2020-09-16 14:08:11,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-16 14:08:11,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:11,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-16 14:08:11,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-16 14:08:11,720 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-16 14:08:11,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:11,796 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-16 14:08:11,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 14:08:11,796 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-16 14:08:11,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:11,797 INFO L225 Difference]: With dead ends: 54 [2020-09-16 14:08:11,797 INFO L226 Difference]: Without dead ends: 48 [2020-09-16 14:08:11,798 INFO L675 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 [2020-09-16 14:08:11,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-16 14:08:11,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-16 14:08:11,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-16 14:08:11,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-16 14:08:11,803 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-16 14:08:11,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:11,804 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-16 14:08:11,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-16 14:08:11,804 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-16 14:08:11,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 14:08:11,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:11,805 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:12,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:12,016 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:12,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:12,018 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-16 14:08:12,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:12,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247201867] [2020-09-16 14:08:12,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:12,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247201867] [2020-09-16 14:08:12,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860040924] [2020-09-16 14:08:12,114 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 [2020-09-16 14:08:12,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 14:08:12,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:12,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 14:08:12,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:12,197 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:12,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:12,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:12,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-16 14:08:12,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461573570] [2020-09-16 14:08:12,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-16 14:08:12,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:12,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-16 14:08:12,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-16 14:08:12,224 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-16 14:08:12,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:12,364 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-16 14:08:12,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 14:08:12,364 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-16 14:08:12,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:12,366 INFO L225 Difference]: With dead ends: 58 [2020-09-16 14:08:12,367 INFO L226 Difference]: Without dead ends: 52 [2020-09-16 14:08:12,367 INFO L675 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 [2020-09-16 14:08:12,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-16 14:08:12,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-16 14:08:12,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-16 14:08:12,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-16 14:08:12,372 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-16 14:08:12,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:12,373 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-16 14:08:12,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-16 14:08:12,373 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-16 14:08:12,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 14:08:12,374 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:12,374 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:12,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:12,587 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:12,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:12,587 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-16 14:08:12,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:12,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042273835] [2020-09-16 14:08:12,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:12,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042273835] [2020-09-16 14:08:12,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806888754] [2020-09-16 14:08:12,652 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 [2020-09-16 14:08:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:12,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 14:08:12,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:12,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:12,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-16 14:08:12,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466158640] [2020-09-16 14:08:12,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-16 14:08:12,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:12,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-16 14:08:12,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-16 14:08:12,721 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-16 14:08:12,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:12,885 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-16 14:08:12,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 14:08:12,887 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-16 14:08:12,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:12,888 INFO L225 Difference]: With dead ends: 78 [2020-09-16 14:08:12,888 INFO L226 Difference]: Without dead ends: 72 [2020-09-16 14:08:12,889 INFO L675 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 [2020-09-16 14:08:12,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-16 14:08:12,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-16 14:08:12,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-16 14:08:12,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-16 14:08:12,903 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-16 14:08:12,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:12,903 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-16 14:08:12,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-16 14:08:12,903 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-16 14:08:12,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 14:08:12,905 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:12,905 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:13,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:13,106 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:13,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:13,107 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-16 14:08:13,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:13,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703398713] [2020-09-16 14:08:13,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:13,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703398713] [2020-09-16 14:08:13,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321474336] [2020-09-16 14:08:13,190 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 [2020-09-16 14:08:13,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:13,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:13,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 14:08:13,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:13,279 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:13,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:13,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-16 14:08:13,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611141919] [2020-09-16 14:08:13,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-16 14:08:13,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:13,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-16 14:08:13,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-16 14:08:13,296 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-16 14:08:13,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:13,490 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-16 14:08:13,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 14:08:13,491 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-16 14:08:13,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:13,492 INFO L225 Difference]: With dead ends: 62 [2020-09-16 14:08:13,493 INFO L226 Difference]: Without dead ends: 54 [2020-09-16 14:08:13,493 INFO L675 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 [2020-09-16 14:08:13,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-16 14:08:13,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-16 14:08:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-16 14:08:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-16 14:08:13,503 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-16 14:08:13,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:13,504 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-16 14:08:13,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-16 14:08:13,504 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-16 14:08:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 14:08:13,505 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:13,505 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:13,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-16 14:08:13,706 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:13,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:13,706 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-16 14:08:13,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:13,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037005605] [2020-09-16 14:08:13,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:13,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037005605] [2020-09-16 14:08:13,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058196035] [2020-09-16 14:08:13,787 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 [2020-09-16 14:08:13,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 14:08:13,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:13,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 14:08:13,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:13,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:13,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-16 14:08:13,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512176853] [2020-09-16 14:08:13,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-16 14:08:13,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:13,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-16 14:08:13,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-16 14:08:13,867 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-16 14:08:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:13,991 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-16 14:08:13,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 14:08:13,992 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-16 14:08:13,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:13,993 INFO L225 Difference]: With dead ends: 64 [2020-09-16 14:08:13,993 INFO L226 Difference]: Without dead ends: 58 [2020-09-16 14:08:13,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:13,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-16 14:08:13,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-16 14:08:13,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-16 14:08:13,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-16 14:08:13,998 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-16 14:08:13,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:13,998 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-16 14:08:13,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-16 14:08:13,998 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-16 14:08:13,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 14:08:13,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:13,999 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:14,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:14,210 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:14,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:14,210 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-16 14:08:14,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:14,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504899918] [2020-09-16 14:08:14,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:14,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504899918] [2020-09-16 14:08:14,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938127510] [2020-09-16 14:08:14,318 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 [2020-09-16 14:08:14,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:14,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:14,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 14:08:14,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:14,395 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:14,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:14,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-16 14:08:14,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68892529] [2020-09-16 14:08:14,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 14:08:14,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:14,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 14:08:14,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:14,412 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-16 14:08:14,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:14,609 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-16 14:08:14,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 14:08:14,610 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-16 14:08:14,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:14,611 INFO L225 Difference]: With dead ends: 61 [2020-09-16 14:08:14,611 INFO L226 Difference]: Without dead ends: 55 [2020-09-16 14:08:14,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-16 14:08:14,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-16 14:08:14,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-16 14:08:14,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-16 14:08:14,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-16 14:08:14,616 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-16 14:08:14,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:14,616 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-16 14:08:14,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 14:08:14,616 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-16 14:08:14,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 14:08:14,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:14,617 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:14,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:14,830 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:14,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:14,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-16 14:08:14,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:14,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906511428] [2020-09-16 14:08:14,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:14,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906511428] [2020-09-16 14:08:14,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536393238] [2020-09-16 14:08:14,923 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 [2020-09-16 14:08:14,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:14,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:14,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 14:08:14,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:14,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:14,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-16 14:08:14,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264774466] [2020-09-16 14:08:14,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-16 14:08:14,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:14,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-16 14:08:14,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-16 14:08:14,995 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-16 14:08:15,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:15,141 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-16 14:08:15,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 14:08:15,142 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-16 14:08:15,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:15,143 INFO L225 Difference]: With dead ends: 77 [2020-09-16 14:08:15,143 INFO L226 Difference]: Without dead ends: 71 [2020-09-16 14:08:15,143 INFO L675 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 [2020-09-16 14:08:15,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-16 14:08:15,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-16 14:08:15,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-16 14:08:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-16 14:08:15,148 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-16 14:08:15,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:15,148 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-16 14:08:15,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-16 14:08:15,148 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-16 14:08:15,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 14:08:15,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:15,149 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:15,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-16 14:08:15,360 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:15,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:15,361 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-16 14:08:15,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:15,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079566697] [2020-09-16 14:08:15,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:15,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079566697] [2020-09-16 14:08:15,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915777685] [2020-09-16 14:08:15,444 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 [2020-09-16 14:08:15,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 14:08:15,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:15,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 14:08:15,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:15,527 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:15,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:15,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-16 14:08:15,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85802634] [2020-09-16 14:08:15,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 14:08:15,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:15,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 14:08:15,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:15,540 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-16 14:08:15,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:15,764 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-09-16 14:08:15,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 14:08:15,764 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-16 14:08:15,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:15,765 INFO L225 Difference]: With dead ends: 58 [2020-09-16 14:08:15,765 INFO L226 Difference]: Without dead ends: 50 [2020-09-16 14:08:15,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-09-16 14:08:15,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-16 14:08:15,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-09-16 14:08:15,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-16 14:08:15,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-16 14:08:15,769 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-16 14:08:15,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:15,769 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-16 14:08:15,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 14:08:15,769 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-16 14:08:15,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 14:08:15,770 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:15,770 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:15,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:15,978 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:15,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:15,979 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-16 14:08:15,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:15,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214030220] [2020-09-16 14:08:15,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:16,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214030220] [2020-09-16 14:08:16,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982229449] [2020-09-16 14:08:16,044 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 [2020-09-16 14:08:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:16,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 14:08:16,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:16,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:16,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:16,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-16 14:08:16,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285241623] [2020-09-16 14:08:16,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 14:08:16,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:16,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 14:08:16,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:16,118 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-16 14:08:16,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:16,283 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-16 14:08:16,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 14:08:16,284 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-16 14:08:16,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:16,284 INFO L225 Difference]: With dead ends: 60 [2020-09-16 14:08:16,285 INFO L226 Difference]: Without dead ends: 55 [2020-09-16 14:08:16,285 INFO L675 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 [2020-09-16 14:08:16,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-16 14:08:16,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-16 14:08:16,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-16 14:08:16,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-16 14:08:16,288 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-16 14:08:16,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:16,288 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-16 14:08:16,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 14:08:16,289 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-16 14:08:16,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 14:08:16,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:16,290 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:16,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-16 14:08:16,499 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:16,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:16,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-16 14:08:16,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:16,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816914830] [2020-09-16 14:08:16,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:16,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816914830] [2020-09-16 14:08:16,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871423755] [2020-09-16 14:08:16,603 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 [2020-09-16 14:08:16,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:16,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:16,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 14:08:16,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:16,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:16,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:16,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-16 14:08:16,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50698000] [2020-09-16 14:08:16,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 14:08:16,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:16,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 14:08:16,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:16,700 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-16 14:08:16,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:16,928 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-16 14:08:16,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 14:08:16,928 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-16 14:08:16,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:16,929 INFO L225 Difference]: With dead ends: 54 [2020-09-16 14:08:16,929 INFO L226 Difference]: Without dead ends: 49 [2020-09-16 14:08:16,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:08:16,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-16 14:08:16,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-16 14:08:16,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-16 14:08:16,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-16 14:08:16,933 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-16 14:08:16,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:16,933 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-16 14:08:16,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 14:08:16,933 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-16 14:08:16,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 14:08:16,934 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:16,934 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:17,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-16 14:08:17,143 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:17,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:17,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-16 14:08:17,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:17,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648108877] [2020-09-16 14:08:17,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:17,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:17,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648108877] [2020-09-16 14:08:17,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69884052] [2020-09-16 14:08:17,233 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 [2020-09-16 14:08:17,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:08:17,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:17,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 14:08:17,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:17,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:17,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-16 14:08:17,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280080758] [2020-09-16 14:08:17,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 14:08:17,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:17,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 14:08:17,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:17,303 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-16 14:08:17,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:17,430 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-16 14:08:17,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 14:08:17,430 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-16 14:08:17,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:17,431 INFO L225 Difference]: With dead ends: 60 [2020-09-16 14:08:17,431 INFO L226 Difference]: Without dead ends: 54 [2020-09-16 14:08:17,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:17,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-16 14:08:17,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-16 14:08:17,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-16 14:08:17,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-16 14:08:17,435 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-16 14:08:17,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:17,436 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-16 14:08:17,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 14:08:17,436 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-16 14:08:17,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 14:08:17,436 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:17,436 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:17,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-16 14:08:17,646 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:17,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:17,647 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-16 14:08:17,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:17,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863721164] [2020-09-16 14:08:17,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:17,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863721164] [2020-09-16 14:08:17,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625704139] [2020-09-16 14:08:17,757 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 [2020-09-16 14:08:17,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:17,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:17,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 14:08:17,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:17,827 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:17,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:17,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-16 14:08:17,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370187015] [2020-09-16 14:08:17,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 14:08:17,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:17,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 14:08:17,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:17,840 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-16 14:08:18,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:18,014 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-16 14:08:18,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 14:08:18,015 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-16 14:08:18,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:18,016 INFO L225 Difference]: With dead ends: 66 [2020-09-16 14:08:18,016 INFO L226 Difference]: Without dead ends: 60 [2020-09-16 14:08:18,016 INFO L675 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 [2020-09-16 14:08:18,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-16 14:08:18,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-16 14:08:18,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-16 14:08:18,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-16 14:08:18,020 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-16 14:08:18,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:18,020 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-16 14:08:18,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 14:08:18,021 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-16 14:08:18,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 14:08:18,021 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:18,021 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:18,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-16 14:08:18,230 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:18,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:18,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-16 14:08:18,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:18,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74951716] [2020-09-16 14:08:18,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:18,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74951716] [2020-09-16 14:08:18,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379050866] [2020-09-16 14:08:18,319 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 [2020-09-16 14:08:18,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:08:18,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:18,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 14:08:18,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:18,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:18,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-16 14:08:18,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521982763] [2020-09-16 14:08:18,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 14:08:18,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:18,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 14:08:18,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:18,402 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-16 14:08:18,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:18,597 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-16 14:08:18,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 14:08:18,598 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-16 14:08:18,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:18,599 INFO L225 Difference]: With dead ends: 67 [2020-09-16 14:08:18,599 INFO L226 Difference]: Without dead ends: 61 [2020-09-16 14:08:18,599 INFO L675 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 [2020-09-16 14:08:18,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-16 14:08:18,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-16 14:08:18,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-16 14:08:18,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-16 14:08:18,602 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-16 14:08:18,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:18,603 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-16 14:08:18,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 14:08:18,603 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-16 14:08:18,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 14:08:18,603 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:18,604 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:18,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:18,811 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:18,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:18,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-16 14:08:18,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:18,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383400464] [2020-09-16 14:08:18,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:18,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383400464] [2020-09-16 14:08:18,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938389543] [2020-09-16 14:08:18,892 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 [2020-09-16 14:08:18,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:08:18,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:18,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 14:08:18,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:18,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:18,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:18,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:18,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-16 14:08:18,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727451475] [2020-09-16 14:08:18,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 14:08:18,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:18,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 14:08:18,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:18,991 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-16 14:08:19,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:19,210 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-16 14:08:19,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 14:08:19,210 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-16 14:08:19,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:19,211 INFO L225 Difference]: With dead ends: 69 [2020-09-16 14:08:19,211 INFO L226 Difference]: Without dead ends: 63 [2020-09-16 14:08:19,212 INFO L675 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 [2020-09-16 14:08:19,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-16 14:08:19,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-16 14:08:19,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-16 14:08:19,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-16 14:08:19,217 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-16 14:08:19,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:19,217 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-16 14:08:19,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 14:08:19,218 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-16 14:08:19,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 14:08:19,218 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:19,218 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:19,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:19,429 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:19,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:19,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-16 14:08:19,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:19,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778726912] [2020-09-16 14:08:19,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:19,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778726912] [2020-09-16 14:08:19,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179118179] [2020-09-16 14:08:19,501 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 [2020-09-16 14:08:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:19,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 14:08:19,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:19,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:19,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-16 14:08:19,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943130496] [2020-09-16 14:08:19,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 14:08:19,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:19,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 14:08:19,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:19,574 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-16 14:08:19,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:19,815 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-16 14:08:19,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:08:19,815 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-16 14:08:19,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:19,817 INFO L225 Difference]: With dead ends: 88 [2020-09-16 14:08:19,817 INFO L226 Difference]: Without dead ends: 82 [2020-09-16 14:08:19,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:08:19,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-16 14:08:19,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-16 14:08:19,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-16 14:08:19,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-16 14:08:19,822 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-16 14:08:19,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:19,822 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-16 14:08:19,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 14:08:19,822 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-16 14:08:19,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 14:08:19,823 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:19,823 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:20,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:20,029 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:20,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:20,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-16 14:08:20,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:20,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175157140] [2020-09-16 14:08:20,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:20,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175157140] [2020-09-16 14:08:20,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760087043] [2020-09-16 14:08:20,101 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 [2020-09-16 14:08:20,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:20,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:20,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 14:08:20,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:20,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:20,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-16 14:08:20,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991613697] [2020-09-16 14:08:20,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 14:08:20,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:20,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 14:08:20,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:20,176 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-16 14:08:20,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:20,470 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-16 14:08:20,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 14:08:20,471 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-16 14:08:20,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:20,472 INFO L225 Difference]: With dead ends: 69 [2020-09-16 14:08:20,472 INFO L226 Difference]: Without dead ends: 61 [2020-09-16 14:08:20,472 INFO L675 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 [2020-09-16 14:08:20,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-16 14:08:20,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-16 14:08:20,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-16 14:08:20,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-16 14:08:20,475 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-16 14:08:20,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:20,475 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-16 14:08:20,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 14:08:20,475 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-16 14:08:20,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:08:20,476 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:20,476 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:20,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-16 14:08:20,683 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:20,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:20,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-16 14:08:20,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:20,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769923950] [2020-09-16 14:08:20,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:20,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:20,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769923950] [2020-09-16 14:08:20,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598259339] [2020-09-16 14:08:20,789 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 [2020-09-16 14:08:20,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:08:20,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:20,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 14:08:20,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:20,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:20,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:20,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-16 14:08:20,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573957970] [2020-09-16 14:08:20,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 14:08:20,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:20,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 14:08:20,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:20,863 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-16 14:08:21,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:21,035 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-16 14:08:21,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 14:08:21,036 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-16 14:08:21,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:21,037 INFO L225 Difference]: With dead ends: 74 [2020-09-16 14:08:21,037 INFO L226 Difference]: Without dead ends: 68 [2020-09-16 14:08:21,038 INFO L675 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 [2020-09-16 14:08:21,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-16 14:08:21,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-16 14:08:21,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-16 14:08:21,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-16 14:08:21,041 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-16 14:08:21,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:21,041 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-16 14:08:21,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 14:08:21,041 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-16 14:08:21,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:08:21,042 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:21,042 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:21,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-16 14:08:21,246 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:21,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:21,246 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-16 14:08:21,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:21,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132994853] [2020-09-16 14:08:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:21,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:21,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132994853] [2020-09-16 14:08:21,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650280442] [2020-09-16 14:08:21,359 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 [2020-09-16 14:08:21,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:21,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:21,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 14:08:21,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:21,431 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:21,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:21,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-16 14:08:21,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282589364] [2020-09-16 14:08:21,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:21,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:21,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:21,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:21,447 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-16 14:08:21,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:21,674 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-16 14:08:21,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 14:08:21,674 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-16 14:08:21,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:21,675 INFO L225 Difference]: With dead ends: 71 [2020-09-16 14:08:21,675 INFO L226 Difference]: Without dead ends: 65 [2020-09-16 14:08:21,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:08:21,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-16 14:08:21,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-16 14:08:21,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-16 14:08:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-16 14:08:21,678 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-16 14:08:21,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:21,678 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-16 14:08:21,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:21,678 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-16 14:08:21,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:08:21,679 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:21,679 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:21,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-16 14:08:21,880 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:21,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:21,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-16 14:08:21,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:21,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427169395] [2020-09-16 14:08:21,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:21,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427169395] [2020-09-16 14:08:21,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066076991] [2020-09-16 14:08:21,976 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 [2020-09-16 14:08:22,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:08:22,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:22,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 14:08:22,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:22,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:22,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-16 14:08:22,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809235094] [2020-09-16 14:08:22,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 14:08:22,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:22,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 14:08:22,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:22,073 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-16 14:08:22,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:22,258 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-16 14:08:22,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 14:08:22,258 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-16 14:08:22,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:22,259 INFO L225 Difference]: With dead ends: 68 [2020-09-16 14:08:22,259 INFO L226 Difference]: Without dead ends: 62 [2020-09-16 14:08:22,260 INFO L675 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 [2020-09-16 14:08:22,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-16 14:08:22,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-16 14:08:22,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-16 14:08:22,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-16 14:08:22,265 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-16 14:08:22,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:22,265 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-16 14:08:22,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 14:08:22,265 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-16 14:08:22,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:08:22,266 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:22,266 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:22,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-16 14:08:22,473 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:22,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:22,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-16 14:08:22,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:22,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298014688] [2020-09-16 14:08:22,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:22,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:22,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298014688] [2020-09-16 14:08:22,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359058175] [2020-09-16 14:08:22,576 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 [2020-09-16 14:08:22,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:08:22,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:22,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 14:08:22,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:22,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:22,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:22,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-16 14:08:22,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392441401] [2020-09-16 14:08:22,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:22,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:22,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:22,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:22,668 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-16 14:08:22,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:22,964 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-16 14:08:22,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 14:08:22,965 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-16 14:08:22,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:22,966 INFO L225 Difference]: With dead ends: 67 [2020-09-16 14:08:22,966 INFO L226 Difference]: Without dead ends: 61 [2020-09-16 14:08:22,966 INFO L675 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 [2020-09-16 14:08:22,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-16 14:08:22,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-16 14:08:22,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-16 14:08:22,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-16 14:08:22,970 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-16 14:08:22,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:22,970 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-16 14:08:22,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:22,970 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-16 14:08:22,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:08:22,971 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:22,971 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:23,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-16 14:08:23,177 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:23,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:23,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-16 14:08:23,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:23,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635365557] [2020-09-16 14:08:23,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:23,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635365557] [2020-09-16 14:08:23,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897672431] [2020-09-16 14:08:23,262 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 [2020-09-16 14:08:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:23,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 14:08:23,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:23,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:23,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-16 14:08:23,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182586915] [2020-09-16 14:08:23,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 14:08:23,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:23,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 14:08:23,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:23,332 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-16 14:08:23,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:23,537 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-16 14:08:23,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:08:23,538 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-16 14:08:23,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:23,538 INFO L225 Difference]: With dead ends: 83 [2020-09-16 14:08:23,539 INFO L226 Difference]: Without dead ends: 77 [2020-09-16 14:08:23,539 INFO L675 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 [2020-09-16 14:08:23,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-16 14:08:23,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-16 14:08:23,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-16 14:08:23,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-16 14:08:23,542 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-16 14:08:23,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:23,542 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-16 14:08:23,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 14:08:23,543 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-16 14:08:23,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:08:23,543 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:23,543 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:23,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:23,752 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:23,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:23,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-16 14:08:23,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:23,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878672508] [2020-09-16 14:08:23,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:23,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878672508] [2020-09-16 14:08:23,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454933641] [2020-09-16 14:08:23,836 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 [2020-09-16 14:08:23,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:23,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:23,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 14:08:23,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:23,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:23,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:23,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-16 14:08:23,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472349636] [2020-09-16 14:08:23,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:23,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:23,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:23,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:23,927 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-16 14:08:24,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:24,302 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-09-16 14:08:24,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:08:24,303 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-16 14:08:24,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:24,303 INFO L225 Difference]: With dead ends: 64 [2020-09-16 14:08:24,303 INFO L226 Difference]: Without dead ends: 56 [2020-09-16 14:08:24,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:08:24,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-16 14:08:24,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-09-16 14:08:24,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-16 14:08:24,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-16 14:08:24,306 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-16 14:08:24,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:24,307 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-16 14:08:24,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:24,307 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-16 14:08:24,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:08:24,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:24,307 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:24,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-16 14:08:24,515 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:24,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:24,515 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-16 14:08:24,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:24,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069672710] [2020-09-16 14:08:24,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:24,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069672710] [2020-09-16 14:08:24,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898524642] [2020-09-16 14:08:24,592 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 [2020-09-16 14:08:24,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:08:24,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:24,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 14:08:24,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:24,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:24,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:24,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-16 14:08:24,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375187313] [2020-09-16 14:08:24,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:24,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:24,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:24,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:24,681 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-16 14:08:25,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:25,006 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-16 14:08:25,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:08:25,007 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-16 14:08:25,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:25,008 INFO L225 Difference]: With dead ends: 68 [2020-09-16 14:08:25,008 INFO L226 Difference]: Without dead ends: 63 [2020-09-16 14:08:25,009 INFO L675 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 [2020-09-16 14:08:25,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-16 14:08:25,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-16 14:08:25,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-16 14:08:25,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-16 14:08:25,012 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-16 14:08:25,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:25,012 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-16 14:08:25,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:25,012 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-16 14:08:25,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:25,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:25,013 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:25,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-16 14:08:25,214 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:25,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:25,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-16 14:08:25,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:25,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156450925] [2020-09-16 14:08:25,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:25,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156450925] [2020-09-16 14:08:25,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526613747] [2020-09-16 14:08:25,310 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 [2020-09-16 14:08:25,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:25,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:25,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:25,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:25,400 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:25,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:25,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:25,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-16 14:08:25,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524398584] [2020-09-16 14:08:25,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:25,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:25,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:25,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:25,415 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-16 14:08:25,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:25,776 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-16 14:08:25,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:08:25,777 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-16 14:08:25,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:25,778 INFO L225 Difference]: With dead ends: 60 [2020-09-16 14:08:25,778 INFO L226 Difference]: Without dead ends: 55 [2020-09-16 14:08:25,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:08:25,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-16 14:08:25,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-16 14:08:25,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-16 14:08:25,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-16 14:08:25,781 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-16 14:08:25,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:25,782 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-16 14:08:25,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:25,782 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-16 14:08:25,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:25,782 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:25,783 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:25,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:25,984 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:25,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:25,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-16 14:08:25,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:25,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662490929] [2020-09-16 14:08:25,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:26,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662490929] [2020-09-16 14:08:26,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534134108] [2020-09-16 14:08:26,092 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 [2020-09-16 14:08:26,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-16 14:08:26,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:26,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:26,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:26,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:26,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-16 14:08:26,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113403662] [2020-09-16 14:08:26,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:26,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:26,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:26,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:26,150 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-16 14:08:26,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:26,335 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-16 14:08:26,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 14:08:26,336 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-16 14:08:26,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:26,337 INFO L225 Difference]: With dead ends: 66 [2020-09-16 14:08:26,337 INFO L226 Difference]: Without dead ends: 60 [2020-09-16 14:08:26,338 INFO L675 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 [2020-09-16 14:08:26,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-16 14:08:26,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-16 14:08:26,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-16 14:08:26,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-16 14:08:26,341 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-16 14:08:26,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:26,342 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-16 14:08:26,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:26,342 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-16 14:08:26,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:26,342 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:26,343 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:26,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:26,553 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:26,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:26,554 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-16 14:08:26,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:26,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494511340] [2020-09-16 14:08:26,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:26,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494511340] [2020-09-16 14:08:26,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773990147] [2020-09-16 14:08:26,731 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:26,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-16 14:08:26,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:26,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:26,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:26,827 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:26,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:26,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-16 14:08:26,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748897936] [2020-09-16 14:08:26,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:26,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:26,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:26,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:26,842 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-16 14:08:27,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:27,065 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-16 14:08:27,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 14:08:27,066 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-16 14:08:27,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:27,067 INFO L225 Difference]: With dead ends: 74 [2020-09-16 14:08:27,067 INFO L226 Difference]: Without dead ends: 68 [2020-09-16 14:08:27,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:08:27,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-16 14:08:27,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-16 14:08:27,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-16 14:08:27,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-16 14:08:27,072 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-16 14:08:27,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:27,072 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-16 14:08:27,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:27,072 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-16 14:08:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:27,073 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:27,073 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:27,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-16 14:08:27,283 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:27,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:27,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-16 14:08:27,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:27,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363365403] [2020-09-16 14:08:27,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:27,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363365403] [2020-09-16 14:08:27,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995304468] [2020-09-16 14:08:27,381 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 [2020-09-16 14:08:27,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:27,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:27,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:27,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:27,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-16 14:08:27,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937123774] [2020-09-16 14:08:27,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:27,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:27,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:27,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:27,445 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-16 14:08:27,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:27,656 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-16 14:08:27,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:08:27,657 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-16 14:08:27,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:27,658 INFO L225 Difference]: With dead ends: 75 [2020-09-16 14:08:27,659 INFO L226 Difference]: Without dead ends: 69 [2020-09-16 14:08:27,659 INFO L675 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 [2020-09-16 14:08:27,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-16 14:08:27,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-16 14:08:27,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-16 14:08:27,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-16 14:08:27,663 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-16 14:08:27,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:27,663 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-16 14:08:27,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:27,663 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-16 14:08:27,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:27,664 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:27,664 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:27,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:27,875 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:27,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:27,876 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-16 14:08:27,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:27,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648502520] [2020-09-16 14:08:27,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:28,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648502520] [2020-09-16 14:08:28,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862782027] [2020-09-16 14:08:28,014 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 [2020-09-16 14:08:28,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:28,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:28,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:28,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:28,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:28,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:28,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-16 14:08:28,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070460522] [2020-09-16 14:08:28,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:28,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:28,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:28,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:28,122 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-16 14:08:28,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:28,403 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-16 14:08:28,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 14:08:28,404 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-16 14:08:28,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:28,404 INFO L225 Difference]: With dead ends: 79 [2020-09-16 14:08:28,404 INFO L226 Difference]: Without dead ends: 73 [2020-09-16 14:08:28,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:08:28,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-16 14:08:28,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-16 14:08:28,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-16 14:08:28,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-16 14:08:28,408 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-16 14:08:28,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:28,408 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-16 14:08:28,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:28,408 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-16 14:08:28,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:28,409 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:28,409 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:28,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-16 14:08:28,620 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:28,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:28,620 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-16 14:08:28,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:28,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471327847] [2020-09-16 14:08:28,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:28,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471327847] [2020-09-16 14:08:28,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503425424] [2020-09-16 14:08:28,713 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 [2020-09-16 14:08:28,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-16 14:08:28,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:28,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:28,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:28,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:28,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-16 14:08:28,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322216873] [2020-09-16 14:08:28,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:28,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:28,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:28,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:28,801 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-16 14:08:29,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:29,051 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-16 14:08:29,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:08:29,051 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-16 14:08:29,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:29,052 INFO L225 Difference]: With dead ends: 79 [2020-09-16 14:08:29,052 INFO L226 Difference]: Without dead ends: 73 [2020-09-16 14:08:29,052 INFO L675 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 [2020-09-16 14:08:29,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-16 14:08:29,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-16 14:08:29,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-16 14:08:29,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-16 14:08:29,055 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-16 14:08:29,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:29,055 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-16 14:08:29,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:29,055 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-16 14:08:29,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:29,057 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:29,057 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:29,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:29,265 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:29,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:29,265 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-16 14:08:29,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:29,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581001984] [2020-09-16 14:08:29,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:29,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581001984] [2020-09-16 14:08:29,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349804575] [2020-09-16 14:08:29,359 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 [2020-09-16 14:08:29,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:29,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:29,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:29,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:29,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:29,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:29,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-16 14:08:29,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155164270] [2020-09-16 14:08:29,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:29,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:29,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:29,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:29,445 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-16 14:08:29,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:29,806 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-16 14:08:29,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:08:29,807 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-16 14:08:29,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:29,808 INFO L225 Difference]: With dead ends: 76 [2020-09-16 14:08:29,808 INFO L226 Difference]: Without dead ends: 70 [2020-09-16 14:08:29,808 INFO L675 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 [2020-09-16 14:08:29,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-16 14:08:29,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-16 14:08:29,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-16 14:08:29,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-16 14:08:29,811 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-16 14:08:29,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:29,811 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-16 14:08:29,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:29,812 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-16 14:08:29,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:29,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:29,812 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:30,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-16 14:08:30,020 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:30,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:30,021 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-16 14:08:30,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:30,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126202075] [2020-09-16 14:08:30,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:30,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126202075] [2020-09-16 14:08:30,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103441478] [2020-09-16 14:08:30,122 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 [2020-09-16 14:08:30,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-16 14:08:30,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:30,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:30,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:30,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:30,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-16 14:08:30,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305868062] [2020-09-16 14:08:30,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:30,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:30,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:30,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:30,191 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-16 14:08:30,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:30,519 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-16 14:08:30,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:08:30,520 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-16 14:08:30,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:30,521 INFO L225 Difference]: With dead ends: 96 [2020-09-16 14:08:30,521 INFO L226 Difference]: Without dead ends: 90 [2020-09-16 14:08:30,521 INFO L675 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 [2020-09-16 14:08:30,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-16 14:08:30,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-16 14:08:30,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-16 14:08:30,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-16 14:08:30,525 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-16 14:08:30,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:30,525 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-16 14:08:30,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:30,525 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-16 14:08:30,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:30,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:30,526 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:30,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-16 14:08:30,735 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:30,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:30,736 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-16 14:08:30,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:30,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192075663] [2020-09-16 14:08:30,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:30,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192075663] [2020-09-16 14:08:30,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798198001] [2020-09-16 14:08:30,834 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 [2020-09-16 14:08:30,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-16 14:08:30,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:30,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:30,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:30,928 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:30,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:30,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-16 14:08:30,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855029162] [2020-09-16 14:08:30,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:30,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:30,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:30,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:30,941 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-16 14:08:31,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:31,346 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-16 14:08:31,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:08:31,347 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-16 14:08:31,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:31,347 INFO L225 Difference]: With dead ends: 77 [2020-09-16 14:08:31,348 INFO L226 Difference]: Without dead ends: 69 [2020-09-16 14:08:31,348 INFO L675 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 [2020-09-16 14:08:31,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-16 14:08:31,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-16 14:08:31,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-16 14:08:31,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-16 14:08:31,350 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-16 14:08:31,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:31,351 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-16 14:08:31,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:31,351 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-16 14:08:31,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:31,351 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:31,351 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:31,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-16 14:08:31,552 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:31,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:31,553 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-16 14:08:31,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:31,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844440264] [2020-09-16 14:08:31,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:31,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844440264] [2020-09-16 14:08:31,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978588258] [2020-09-16 14:08:31,683 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 [2020-09-16 14:08:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:31,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:31,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:31,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:31,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-16 14:08:31,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781616075] [2020-09-16 14:08:31,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:31,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:31,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:31,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:31,761 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-16 14:08:31,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:31,950 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-16 14:08:31,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 14:08:31,950 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-16 14:08:31,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:31,951 INFO L225 Difference]: With dead ends: 84 [2020-09-16 14:08:31,951 INFO L226 Difference]: Without dead ends: 78 [2020-09-16 14:08:31,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:08:31,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-16 14:08:31,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-16 14:08:31,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-16 14:08:31,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-16 14:08:31,954 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-16 14:08:31,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:31,955 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-16 14:08:31,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:31,955 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-16 14:08:31,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:31,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:31,956 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:32,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-16 14:08:32,163 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:32,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:32,163 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-16 14:08:32,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:32,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437941842] [2020-09-16 14:08:32,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:32,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:32,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437941842] [2020-09-16 14:08:32,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564916221] [2020-09-16 14:08:32,298 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 [2020-09-16 14:08:32,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:32,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:32,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:32,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:32,355 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:32,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:32,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-16 14:08:32,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944556770] [2020-09-16 14:08:32,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:32,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:32,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:32,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:32,366 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-16 14:08:32,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:32,677 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-16 14:08:32,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 14:08:32,678 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-16 14:08:32,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:32,679 INFO L225 Difference]: With dead ends: 81 [2020-09-16 14:08:32,679 INFO L226 Difference]: Without dead ends: 75 [2020-09-16 14:08:32,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:08:32,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-16 14:08:32,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-16 14:08:32,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-16 14:08:32,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-16 14:08:32,682 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-16 14:08:32,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:32,683 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-16 14:08:32,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:32,683 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-16 14:08:32,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:32,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:32,683 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:32,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-16 14:08:32,891 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:32,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:32,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-16 14:08:32,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:32,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433356938] [2020-09-16 14:08:32,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:33,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433356938] [2020-09-16 14:08:33,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156974225] [2020-09-16 14:08:33,004 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 [2020-09-16 14:08:33,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-16 14:08:33,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:33,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:33,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:33,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:33,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-16 14:08:33,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050710700] [2020-09-16 14:08:33,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:33,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:33,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:33,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:33,079 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-16 14:08:33,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:33,359 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-16 14:08:33,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:08:33,359 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-16 14:08:33,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:33,360 INFO L225 Difference]: With dead ends: 78 [2020-09-16 14:08:33,360 INFO L226 Difference]: Without dead ends: 72 [2020-09-16 14:08:33,361 INFO L675 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 [2020-09-16 14:08:33,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-16 14:08:33,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-16 14:08:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-16 14:08:33,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-16 14:08:33,363 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-16 14:08:33,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:33,363 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-16 14:08:33,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:33,364 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-16 14:08:33,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:33,364 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:33,364 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:33,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-16 14:08:33,571 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:33,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:33,572 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-16 14:08:33,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:33,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583338225] [2020-09-16 14:08:33,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:33,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583338225] [2020-09-16 14:08:33,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586643067] [2020-09-16 14:08:33,692 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 [2020-09-16 14:08:33,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:33,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:33,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:33,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:33,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:33,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:33,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-16 14:08:33,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196515289] [2020-09-16 14:08:33,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:33,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:33,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:33,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:33,781 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-16 14:08:34,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:34,170 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-16 14:08:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:08:34,171 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-16 14:08:34,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:34,172 INFO L225 Difference]: With dead ends: 77 [2020-09-16 14:08:34,172 INFO L226 Difference]: Without dead ends: 71 [2020-09-16 14:08:34,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-09-16 14:08:34,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-16 14:08:34,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-16 14:08:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-16 14:08:34,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-16 14:08:34,175 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-16 14:08:34,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:34,175 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-16 14:08:34,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:34,175 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-16 14:08:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:34,175 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:34,176 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:34,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-16 14:08:34,383 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:34,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:34,384 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-16 14:08:34,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:34,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13875344] [2020-09-16 14:08:34,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:34,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13875344] [2020-09-16 14:08:34,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921480601] [2020-09-16 14:08:34,499 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 [2020-09-16 14:08:34,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-16 14:08:34,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:34,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:34,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:34,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:34,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-16 14:08:34,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985992236] [2020-09-16 14:08:34,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:34,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:34,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:34,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:34,578 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-16 14:08:34,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:34,907 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-16 14:08:34,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:08:34,907 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-16 14:08:34,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:34,908 INFO L225 Difference]: With dead ends: 74 [2020-09-16 14:08:34,908 INFO L226 Difference]: Without dead ends: 68 [2020-09-16 14:08:34,909 INFO L675 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 [2020-09-16 14:08:34,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-16 14:08:34,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-16 14:08:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-16 14:08:34,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-16 14:08:34,911 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-16 14:08:34,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:34,912 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-16 14:08:34,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:34,912 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-16 14:08:34,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:34,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:34,912 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:35,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:35,121 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:35,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:35,122 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-16 14:08:35,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:35,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340764318] [2020-09-16 14:08:35,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:35,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340764318] [2020-09-16 14:08:35,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195114247] [2020-09-16 14:08:35,240 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 [2020-09-16 14:08:35,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-16 14:08:35,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:35,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:35,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:35,319 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:35,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:35,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:35,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-16 14:08:35,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665861358] [2020-09-16 14:08:35,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:35,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:35,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:35,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:35,336 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-16 14:08:35,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:35,778 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-16 14:08:35,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:08:35,778 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-16 14:08:35,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:35,779 INFO L225 Difference]: With dead ends: 73 [2020-09-16 14:08:35,779 INFO L226 Difference]: Without dead ends: 67 [2020-09-16 14:08:35,780 INFO L675 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 [2020-09-16 14:08:35,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-16 14:08:35,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-16 14:08:35,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-16 14:08:35,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-16 14:08:35,783 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-16 14:08:35,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:35,783 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-16 14:08:35,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:35,783 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-16 14:08:35,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:35,784 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:35,784 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:35,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-16 14:08:35,989 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:35,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:35,991 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-16 14:08:35,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:35,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395739243] [2020-09-16 14:08:35,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:36,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395739243] [2020-09-16 14:08:36,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399939321] [2020-09-16 14:08:36,111 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 [2020-09-16 14:08:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:36,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:36,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:36,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:36,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-16 14:08:36,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666560101] [2020-09-16 14:08:36,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:36,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:36,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:36,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:36,185 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-16 14:08:36,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:36,546 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-16 14:08:36,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:08:36,547 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-16 14:08:36,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:36,548 INFO L225 Difference]: With dead ends: 89 [2020-09-16 14:08:36,548 INFO L226 Difference]: Without dead ends: 83 [2020-09-16 14:08:36,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:08:36,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-16 14:08:36,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-16 14:08:36,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-16 14:08:36,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-16 14:08:36,550 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-16 14:08:36,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:36,551 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-16 14:08:36,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:36,552 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-16 14:08:36,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:36,552 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:36,552 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:36,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:36,754 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:36,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:36,755 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-16 14:08:36,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:36,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230228538] [2020-09-16 14:08:36,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:36,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:36,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230228538] [2020-09-16 14:08:36,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683673935] [2020-09-16 14:08:36,848 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 [2020-09-16 14:08:36,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:36,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:36,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:36,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:36,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:36,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-16 14:08:36,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641313115] [2020-09-16 14:08:36,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:36,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:36,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:36,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:36,936 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-16 14:08:37,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:37,378 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-09-16 14:08:37,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:08:37,379 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-16 14:08:37,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:37,380 INFO L225 Difference]: With dead ends: 68 [2020-09-16 14:08:37,380 INFO L226 Difference]: Without dead ends: 60 [2020-09-16 14:08:37,381 INFO L675 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 [2020-09-16 14:08:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-16 14:08:37,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-09-16 14:08:37,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-16 14:08:37,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-16 14:08:37,384 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-16 14:08:37,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:37,384 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-16 14:08:37,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:37,385 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-16 14:08:37,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:37,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:37,385 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:37,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-16 14:08:37,594 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:37,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:37,594 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-16 14:08:37,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:37,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255342015] [2020-09-16 14:08:37,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:37,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:37,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255342015] [2020-09-16 14:08:37,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691963438] [2020-09-16 14:08:37,695 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 [2020-09-16 14:08:37,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-16 14:08:37,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:37,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:37,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:37,778 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:37,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:37,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-16 14:08:37,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726822090] [2020-09-16 14:08:37,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:37,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:37,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:37,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:37,795 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-16 14:08:38,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:38,251 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-16 14:08:38,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:08:38,252 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-16 14:08:38,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:38,253 INFO L225 Difference]: With dead ends: 76 [2020-09-16 14:08:38,253 INFO L226 Difference]: Without dead ends: 71 [2020-09-16 14:08:38,253 INFO L675 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 [2020-09-16 14:08:38,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-16 14:08:38,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-16 14:08:38,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-16 14:08:38,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-16 14:08:38,256 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-16 14:08:38,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:38,256 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-16 14:08:38,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:38,257 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-16 14:08:38,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:38,257 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:38,257 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:38,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:38,466 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:38,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:38,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-16 14:08:38,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:38,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267401015] [2020-09-16 14:08:38,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:38,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267401015] [2020-09-16 14:08:38,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194235130] [2020-09-16 14:08:38,607 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 [2020-09-16 14:08:38,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:38,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:38,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:38,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:38,702 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:38,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:38,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-16 14:08:38,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471058534] [2020-09-16 14:08:38,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:38,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:38,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:38,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:38,724 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-16 14:08:39,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:39,222 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-16 14:08:39,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:08:39,223 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-16 14:08:39,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:39,224 INFO L225 Difference]: With dead ends: 66 [2020-09-16 14:08:39,224 INFO L226 Difference]: Without dead ends: 61 [2020-09-16 14:08:39,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-09-16 14:08:39,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-16 14:08:39,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-16 14:08:39,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-16 14:08:39,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-16 14:08:39,227 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-16 14:08:39,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:39,227 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-16 14:08:39,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:39,227 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-16 14:08:39,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:39,228 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:39,228 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:39,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-16 14:08:39,436 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:39,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:39,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-16 14:08:39,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:39,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814095800] [2020-09-16 14:08:39,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:39,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814095800] [2020-09-16 14:08:39,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561097845] [2020-09-16 14:08:39,585 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 [2020-09-16 14:08:39,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-16 14:08:39,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:39,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:39,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:39,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:39,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-16 14:08:39,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277429872] [2020-09-16 14:08:39,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:39,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:39,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:39,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:39,654 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-16 14:08:39,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:39,867 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-16 14:08:39,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 14:08:39,867 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-16 14:08:39,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:39,868 INFO L225 Difference]: With dead ends: 72 [2020-09-16 14:08:39,868 INFO L226 Difference]: Without dead ends: 66 [2020-09-16 14:08:39,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:08:39,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-16 14:08:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-16 14:08:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-16 14:08:39,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-16 14:08:39,872 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-16 14:08:39,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:39,872 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-16 14:08:39,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:39,873 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-16 14:08:39,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:39,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:39,873 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:40,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-16 14:08:40,081 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:40,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:40,082 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-16 14:08:40,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:40,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496541683] [2020-09-16 14:08:40,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:40,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496541683] [2020-09-16 14:08:40,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504881297] [2020-09-16 14:08:40,224 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 [2020-09-16 14:08:40,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-16 14:08:40,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:40,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:40,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:40,313 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:40,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:40,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-16 14:08:40,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030347673] [2020-09-16 14:08:40,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:40,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:40,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:40,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:40,327 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-16 14:08:40,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:40,600 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-16 14:08:40,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 14:08:40,601 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-16 14:08:40,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:40,602 INFO L225 Difference]: With dead ends: 82 [2020-09-16 14:08:40,602 INFO L226 Difference]: Without dead ends: 76 [2020-09-16 14:08:40,603 INFO L675 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 [2020-09-16 14:08:40,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-16 14:08:40,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-16 14:08:40,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-16 14:08:40,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-16 14:08:40,606 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-16 14:08:40,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:40,606 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-16 14:08:40,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:40,606 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-16 14:08:40,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:40,607 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:40,607 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:40,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-16 14:08:40,816 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:40,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:40,817 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-16 14:08:40,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:40,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472312371] [2020-09-16 14:08:40,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:40,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472312371] [2020-09-16 14:08:40,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683682574] [2020-09-16 14:08:40,965 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 [2020-09-16 14:08:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:41,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:41,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:41,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:41,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-16 14:08:41,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695534204] [2020-09-16 14:08:41,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:41,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:41,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:41,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:41,049 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-16 14:08:41,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:41,340 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-16 14:08:41,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:08:41,341 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-16 14:08:41,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:41,342 INFO L225 Difference]: With dead ends: 83 [2020-09-16 14:08:41,342 INFO L226 Difference]: Without dead ends: 77 [2020-09-16 14:08:41,343 INFO L675 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 [2020-09-16 14:08:41,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-16 14:08:41,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-16 14:08:41,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-16 14:08:41,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-16 14:08:41,345 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-16 14:08:41,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:41,346 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-16 14:08:41,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:41,346 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-16 14:08:41,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:41,347 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:41,347 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:41,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-16 14:08:41,555 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:41,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:41,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-16 14:08:41,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:41,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370714976] [2020-09-16 14:08:41,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:41,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:41,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370714976] [2020-09-16 14:08:41,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933016701] [2020-09-16 14:08:41,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:41,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:41,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:41,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:41,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:41,798 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:41,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:41,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:41,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-16 14:08:41,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256786443] [2020-09-16 14:08:41,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:41,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:41,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:41,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:41,818 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-16 14:08:42,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:42,213 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-16 14:08:42,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:08:42,216 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-16 14:08:42,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:42,217 INFO L225 Difference]: With dead ends: 89 [2020-09-16 14:08:42,218 INFO L226 Difference]: Without dead ends: 83 [2020-09-16 14:08:42,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:08:42,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-16 14:08:42,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-16 14:08:42,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-16 14:08:42,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-16 14:08:42,225 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-16 14:08:42,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:42,226 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-16 14:08:42,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-16 14:08:42,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:42,227 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:42,227 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:42,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:42,438 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:42,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:42,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-16 14:08:42,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:42,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108356435] [2020-09-16 14:08:42,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:42,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:42,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108356435] [2020-09-16 14:08:42,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690518156] [2020-09-16 14:08:42,579 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 [2020-09-16 14:08:42,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-16 14:08:42,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:42,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:42,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:42,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:42,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-16 14:08:42,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582441674] [2020-09-16 14:08:42,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:42,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:42,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:42,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:42,654 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-16 14:08:42,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:42,967 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-16 14:08:42,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:08:42,968 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-16 14:08:42,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:42,969 INFO L225 Difference]: With dead ends: 89 [2020-09-16 14:08:42,969 INFO L226 Difference]: Without dead ends: 83 [2020-09-16 14:08:42,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-16 14:08:42,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-16 14:08:42,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-16 14:08:42,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-16 14:08:42,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-16 14:08:42,972 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-16 14:08:42,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:42,973 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-16 14:08:42,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:42,973 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-16 14:08:42,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:42,974 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:42,974 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:43,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:43,184 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:43,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:43,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-16 14:08:43,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:43,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526681856] [2020-09-16 14:08:43,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:43,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526681856] [2020-09-16 14:08:43,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727700324] [2020-09-16 14:08:43,335 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 [2020-09-16 14:08:43,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:43,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:43,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:43,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:43,409 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:43,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:43,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-16 14:08:43,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946463259] [2020-09-16 14:08:43,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:43,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:43,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:43,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:43,424 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-16 14:08:43,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:43,869 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-16 14:08:43,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:08:43,870 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-16 14:08:43,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:43,871 INFO L225 Difference]: With dead ends: 86 [2020-09-16 14:08:43,871 INFO L226 Difference]: Without dead ends: 80 [2020-09-16 14:08:43,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-09-16 14:08:43,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-16 14:08:43,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-16 14:08:43,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-16 14:08:43,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-16 14:08:43,875 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-16 14:08:43,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:43,875 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-16 14:08:43,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:43,875 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-16 14:08:43,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:43,876 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:43,876 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:44,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-16 14:08:44,083 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:44,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:44,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-16 14:08:44,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:44,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909371895] [2020-09-16 14:08:44,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:44,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:44,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909371895] [2020-09-16 14:08:44,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255113093] [2020-09-16 14:08:44,191 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 [2020-09-16 14:08:44,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-16 14:08:44,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:44,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:44,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:44,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:44,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-16 14:08:44,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423591245] [2020-09-16 14:08:44,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:44,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:44,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:44,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:44,274 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-16 14:08:44,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:44,675 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-16 14:08:44,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-16 14:08:44,676 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-16 14:08:44,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:44,677 INFO L225 Difference]: With dead ends: 87 [2020-09-16 14:08:44,677 INFO L226 Difference]: Without dead ends: 81 [2020-09-16 14:08:44,677 INFO L675 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 [2020-09-16 14:08:44,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-16 14:08:44,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-16 14:08:44,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-16 14:08:44,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-16 14:08:44,679 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-16 14:08:44,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:44,680 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-16 14:08:44,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:44,680 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-16 14:08:44,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:44,680 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:44,681 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:44,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:44,890 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:44,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:44,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-16 14:08:44,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:44,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190262060] [2020-09-16 14:08:44,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:45,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190262060] [2020-09-16 14:08:45,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708187585] [2020-09-16 14:08:45,025 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 [2020-09-16 14:08:45,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-16 14:08:45,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:45,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:45,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:45,126 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:45,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:45,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-16 14:08:45,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353437630] [2020-09-16 14:08:45,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:45,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:45,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:45,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:45,143 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-16 14:08:45,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:45,616 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-16 14:08:45,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 14:08:45,617 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-16 14:08:45,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:45,617 INFO L225 Difference]: With dead ends: 84 [2020-09-16 14:08:45,618 INFO L226 Difference]: Without dead ends: 78 [2020-09-16 14:08:45,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-09-16 14:08:45,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-16 14:08:45,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-16 14:08:45,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-16 14:08:45,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-16 14:08:45,621 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-16 14:08:45,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:45,621 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-16 14:08:45,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:45,622 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-16 14:08:45,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:45,622 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:45,622 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:45,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-16 14:08:45,830 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:45,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:45,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-16 14:08:45,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:45,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365586260] [2020-09-16 14:08:45,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:45,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365586260] [2020-09-16 14:08:45,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926336435] [2020-09-16 14:08:45,949 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 [2020-09-16 14:08:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:46,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:46,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:46,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:46,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:46,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-16 14:08:46,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122752278] [2020-09-16 14:08:46,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:46,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:46,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:46,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:46,022 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-16 14:08:46,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:46,489 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-16 14:08:46,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:08:46,490 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-16 14:08:46,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:46,491 INFO L225 Difference]: With dead ends: 104 [2020-09-16 14:08:46,491 INFO L226 Difference]: Without dead ends: 98 [2020-09-16 14:08:46,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-09-16 14:08:46,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-16 14:08:46,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-16 14:08:46,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-16 14:08:46,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-16 14:08:46,495 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-16 14:08:46,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:46,495 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-16 14:08:46,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:46,495 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-16 14:08:46,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:46,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:46,496 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:46,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-16 14:08:46,705 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:46,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:46,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-16 14:08:46,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:46,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644818920] [2020-09-16 14:08:46,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:46,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644818920] [2020-09-16 14:08:46,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828292809] [2020-09-16 14:08:46,842 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 [2020-09-16 14:08:46,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:46,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:46,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:46,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:46,926 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:46,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:46,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-16 14:08:46,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11647436] [2020-09-16 14:08:46,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:46,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:46,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:46,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:46,938 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-16 14:08:47,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:47,493 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-16 14:08:47,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 14:08:47,494 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-16 14:08:47,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:47,495 INFO L225 Difference]: With dead ends: 85 [2020-09-16 14:08:47,495 INFO L226 Difference]: Without dead ends: 77 [2020-09-16 14:08:47,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-09-16 14:08:47,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-16 14:08:47,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-16 14:08:47,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-16 14:08:47,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-16 14:08:47,499 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-16 14:08:47,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:47,499 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-16 14:08:47,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:47,500 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-16 14:08:47,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:47,500 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:47,501 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:47,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-16 14:08:47,712 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:47,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:47,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-16 14:08:47,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:47,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277763442] [2020-09-16 14:08:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-16 14:08:47,727 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-16 14:08:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-16 14:08:47,749 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-16 14:08:47,783 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-16 14:08:47,784 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-16 14:08:47,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-09-16 14:08:47,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 02:08:47 BasicIcfg [2020-09-16 14:08:47,877 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-16 14:08:47,880 INFO L168 Benchmark]: Toolchain (without parser) took 41013.53 ms. Allocated memory was 140.0 MB in the beginning and 433.6 MB in the end (delta: 293.6 MB). Free memory was 102.2 MB in the beginning and 293.7 MB in the end (delta: -191.5 MB). Peak memory consumption was 102.1 MB. Max. memory is 7.1 GB. [2020-09-16 14:08:47,880 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-09-16 14:08:47,880 INFO L168 Benchmark]: CACSL2BoogieTranslator took 846.34 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 101.5 MB in the beginning and 164.3 MB in the end (delta: -62.8 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. [2020-09-16 14:08:47,881 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.00 ms. Allocated memory is still 204.5 MB. Free memory was 164.3 MB in the beginning and 162.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-16 14:08:47,881 INFO L168 Benchmark]: Boogie Preprocessor took 33.40 ms. Allocated memory is still 204.5 MB. Free memory was 162.3 MB in the beginning and 160.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-16 14:08:47,882 INFO L168 Benchmark]: RCFGBuilder took 443.38 ms. Allocated memory is still 204.5 MB. Free memory was 160.9 MB in the beginning and 140.3 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-09-16 14:08:47,882 INFO L168 Benchmark]: TraceAbstraction took 39622.04 ms. Allocated memory was 204.5 MB in the beginning and 433.6 MB in the end (delta: 229.1 MB). Free memory was 140.3 MB in the beginning and 293.7 MB in the end (delta: -153.3 MB). Peak memory consumption was 75.8 MB. Max. memory is 7.1 GB. [2020-09-16 14:08:47,885 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 846.34 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 101.5 MB in the beginning and 164.3 MB in the end (delta: -62.8 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 57.00 ms. Allocated memory is still 204.5 MB. Free memory was 164.3 MB in the beginning and 162.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.40 ms. Allocated memory is still 204.5 MB. Free memory was 162.3 MB in the beginning and 160.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 443.38 ms. Allocated memory is still 204.5 MB. Free memory was 160.9 MB in the beginning and 140.3 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 39622.04 ms. Allocated memory was 204.5 MB in the beginning and 433.6 MB in the end (delta: 229.1 MB). Free memory was 140.3 MB in the beginning and 293.7 MB in the end (delta: -153.3 MB). Peak memory consumption was 75.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - 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=2, k=3] [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=4, k=3] [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: 39.4s, OverallIterations: 59, TraceHistogramMax: 5, AutomataDifference: 15.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 901 SDtfs, 2428 SDslu, 3534 SDs, 0 SdLazy, 3810 SolverSat, 1596 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1778 GetRequests, 634 SyntacticMatches, 53 SemanticMatches, 1091 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4729 ImplicationChecksByTransitivity, 14.4s 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: 0.4s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 6.9s 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...