/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 20:20:58,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 20:20:58,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 20:20:58,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 20:20:58,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 20:20:58,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 20:20:58,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 20:20:58,085 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 20:20:58,087 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 20:20:58,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 20:20:58,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 20:20:58,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 20:20:58,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 20:20:58,095 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 20:20:58,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 20:20:58,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 20:20:58,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 20:20:58,101 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 20:20:58,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 20:20:58,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 20:20:58,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 20:20:58,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 20:20:58,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 20:20:58,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 20:20:58,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 20:20:58,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 20:20:58,127 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 20:20:58,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 20:20:58,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 20:20:58,137 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 20:20:58,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 20:20:58,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 20:20:58,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 20:20:58,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 20:20:58,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 20:20:58,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 20:20:58,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 20:20:58,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 20:20:58,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 20:20:58,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 20:20:58,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 20:20:58,146 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf [2020-10-15 20:20:58,184 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 20:20:58,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 20:20:58,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 20:20:58,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 20:20:58,187 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 20:20:58,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 20:20:58,187 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 20:20:58,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 20:20:58,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 20:20:58,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 20:20:58,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 20:20:58,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 20:20:58,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 20:20:58,189 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 20:20:58,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 20:20:58,190 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 20:20:58,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 20:20:58,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 20:20:58,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 20:20:58,191 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 20:20:58,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 20:20:58,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 20:20:58,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 20:20:58,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 20:20:58,192 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 20:20:58,192 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 20:20:58,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 20:20:58,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 20:20:58,192 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 20:20:58,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 20:20:58,543 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 20:20:58,546 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 20:20:58,549 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 20:20:58,552 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 20:20:58,553 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-15 20:20:58,607 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2b58014a/e04ec72e069744438b83cc686962aea4/FLAGb1e4cc693 [2020-10-15 20:20:59,091 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 20:20:59,092 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-10-15 20:20:59,109 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2b58014a/e04ec72e069744438b83cc686962aea4/FLAGb1e4cc693 [2020-10-15 20:20:59,453 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2b58014a/e04ec72e069744438b83cc686962aea4 [2020-10-15 20:20:59,461 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 20:20:59,463 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 20:20:59,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 20:20:59,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 20:20:59,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 20:20:59,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:20:59" (1/1) ... [2020-10-15 20:20:59,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@233c896a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:20:59, skipping insertion in model container [2020-10-15 20:20:59,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:20:59" (1/1) ... [2020-10-15 20:20:59,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 20:20:59,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 20:21:00,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 20:21:00,193 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 20:21:00,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 20:21:00,313 INFO L208 MainTranslator]: Completed translation [2020-10-15 20:21:00,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:00 WrapperNode [2020-10-15 20:21:00,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 20:21:00,315 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 20:21:00,315 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 20:21:00,315 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 20:21:00,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:00" (1/1) ... [2020-10-15 20:21:00,340 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:00" (1/1) ... [2020-10-15 20:21:00,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 20:21:00,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 20:21:00,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 20:21:00,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 20:21:00,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:00" (1/1) ... [2020-10-15 20:21:00,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:00" (1/1) ... [2020-10-15 20:21:00,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:00" (1/1) ... [2020-10-15 20:21:00,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:00" (1/1) ... [2020-10-15 20:21:00,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:00" (1/1) ... [2020-10-15 20:21:00,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:00" (1/1) ... [2020-10-15 20:21:00,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:00" (1/1) ... [2020-10-15 20:21:00,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 20:21:00,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 20:21:00,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 20:21:00,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 20:21:00,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 20:21:00,458 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-15 20:21:00,458 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-15 20:21:00,458 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-15 20:21:00,458 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-15 20:21:00,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 20:21:00,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-15 20:21:00,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 20:21:00,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 20:21:00,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-15 20:21:00,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 20:21:00,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 20:21:00,465 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-15 20:21:00,740 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 20:21:00,740 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-15 20:21:00,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:21:00 BoogieIcfgContainer [2020-10-15 20:21:00,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 20:21:00,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 20:21:00,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 20:21:00,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 20:21:00,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:20:59" (1/3) ... [2020-10-15 20:21:00,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cab8555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:21:00, skipping insertion in model container [2020-10-15 20:21:00,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:21:00" (2/3) ... [2020-10-15 20:21:00,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cab8555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:21:00, skipping insertion in model container [2020-10-15 20:21:00,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:21:00" (3/3) ... [2020-10-15 20:21:00,753 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-10-15 20:21:00,768 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 20:21:00,768 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 20:21:00,777 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 20:21:00,778 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 20:21:00,805 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,806 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,806 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,806 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,807 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,807 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,807 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,808 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,808 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,808 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,808 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,809 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,809 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,810 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,810 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,811 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,811 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,811 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,812 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,812 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,812 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,812 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,813 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,813 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,813 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,814 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,814 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,814 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,818 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,818 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,818 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,819 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,819 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,819 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,824 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,824 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,824 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,825 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,825 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,825 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 20:21:00,842 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-15 20:21:00,864 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 20:21:00,864 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 20:21:00,864 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 20:21:00,864 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 20:21:00,865 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 20:21:00,865 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 20:21:00,865 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 20:21:00,865 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 20:21:00,878 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 20:21:00,880 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-15 20:21:00,883 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-15 20:21:00,885 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-15 20:21:00,930 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-15 20:21:00,931 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 20:21:00,936 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-15 20:21:00,940 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-15 20:21:02,191 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-15 20:21:02,192 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-15 20:21:02,199 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-15 20:21:02,212 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-15 20:21:02,215 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-15 20:21:02,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-15 20:21:02,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:02,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-15 20:21:02,223 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:02,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:02,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-15 20:21:02,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:02,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442829250] [2020-10-15 20:21:02,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:02,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442829250] [2020-10-15 20:21:02,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:21:02,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 20:21:02,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796910208] [2020-10-15 20:21:02,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 20:21:02,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:02,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 20:21:02,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 20:21:02,497 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-15 20:21:02,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:02,566 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-15 20:21:02,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 20:21:02,569 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-15 20:21:02,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:02,582 INFO L225 Difference]: With dead ends: 75 [2020-10-15 20:21:02,582 INFO L226 Difference]: Without dead ends: 42 [2020-10-15 20:21:02,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 20:21:02,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-15 20:21:02,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-15 20:21:02,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 20:21:02,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-15 20:21:02,626 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-15 20:21:02,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:02,627 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-15 20:21:02,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 20:21:02,627 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-15 20:21:02,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 20:21:02,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:02,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:02,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 20:21:02,629 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:02,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:02,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-15 20:21:02,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:02,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080228698] [2020-10-15 20:21:02,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:02,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080228698] [2020-10-15 20:21:02,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:21:02,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 20:21:02,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329315022] [2020-10-15 20:21:02,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 20:21:02,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:02,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 20:21:02,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 20:21:02,718 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-15 20:21:02,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:02,752 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-15 20:21:02,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 20:21:02,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 20:21:02,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:02,754 INFO L225 Difference]: With dead ends: 56 [2020-10-15 20:21:02,754 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 20:21:02,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-15 20:21:02,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 20:21:02,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-15 20:21:02,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 20:21:02,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-15 20:21:02,763 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-15 20:21:02,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:02,765 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-15 20:21:02,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 20:21:02,765 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-15 20:21:02,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 20:21:02,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:02,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:02,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 20:21:02,767 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:02,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:02,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-15 20:21:02,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:02,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267528142] [2020-10-15 20:21:02,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:02,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267528142] [2020-10-15 20:21:02,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:21:02,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 20:21:02,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468045478] [2020-10-15 20:21:02,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 20:21:02,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:02,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 20:21:02,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 20:21:02,862 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-15 20:21:02,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:02,960 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-15 20:21:02,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 20:21:02,961 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 20:21:02,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:02,963 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:21:02,963 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 20:21:02,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:02,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 20:21:02,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-15 20:21:02,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:02,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 20:21:02,974 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-15 20:21:02,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:02,974 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 20:21:02,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 20:21:02,974 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 20:21:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 20:21:02,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:02,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:02,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 20:21:02,976 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:02,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:02,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-15 20:21:02,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:02,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655458369] [2020-10-15 20:21:02,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:03,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655458369] [2020-10-15 20:21:03,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:21:03,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 20:21:03,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640771302] [2020-10-15 20:21:03,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 20:21:03,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:03,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 20:21:03,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 20:21:03,072 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-15 20:21:03,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:03,154 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-15 20:21:03,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 20:21:03,156 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 20:21:03,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:03,157 INFO L225 Difference]: With dead ends: 54 [2020-10-15 20:21:03,157 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 20:21:03,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:03,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 20:21:03,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-15 20:21:03,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 20:21:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-15 20:21:03,171 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-15 20:21:03,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:03,171 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-15 20:21:03,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 20:21:03,172 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-15 20:21:03,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 20:21:03,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:03,173 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:03,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 20:21:03,174 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:03,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:03,174 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-15 20:21:03,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:03,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473839218] [2020-10-15 20:21:03,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:03,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473839218] [2020-10-15 20:21:03,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 20:21:03,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 20:21:03,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285533341] [2020-10-15 20:21:03,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 20:21:03,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:03,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 20:21:03,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 20:21:03,274 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-15 20:21:03,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:03,336 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-15 20:21:03,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 20:21:03,337 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 20:21:03,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:03,338 INFO L225 Difference]: With dead ends: 57 [2020-10-15 20:21:03,338 INFO L226 Difference]: Without dead ends: 51 [2020-10-15 20:21:03,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:03,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-15 20:21:03,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-15 20:21:03,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 20:21:03,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-15 20:21:03,344 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-15 20:21:03,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:03,344 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-15 20:21:03,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 20:21:03,344 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-15 20:21:03,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:21:03,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:03,345 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:03,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 20:21:03,346 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:03,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:03,346 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-15 20:21:03,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:03,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957366638] [2020-10-15 20:21:03,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:03,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957366638] [2020-10-15 20:21:03,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65154789] [2020-10-15 20:21:03,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:03,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:03,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:03,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:21:03,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:03,518 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:03,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:03,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:03,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 20:21:03,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540006550] [2020-10-15 20:21:03,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:03,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:03,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:03,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:03,532 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-15 20:21:03,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:03,650 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-15 20:21:03,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 20:21:03,657 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 20:21:03,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:03,657 INFO L225 Difference]: With dead ends: 48 [2020-10-15 20:21:03,658 INFO L226 Difference]: Without dead ends: 43 [2020-10-15 20:21:03,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:03,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-15 20:21:03,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-15 20:21:03,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 20:21:03,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-15 20:21:03,667 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-15 20:21:03,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:03,668 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-15 20:21:03,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:03,668 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-15 20:21:03,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:21:03,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:03,669 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:03,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-15 20:21:03,870 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:03,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:03,871 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-15 20:21:03,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:03,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130273745] [2020-10-15 20:21:03,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:03,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130273745] [2020-10-15 20:21:03,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546742303] [2020-10-15 20:21:03,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:03,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:03,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:03,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:21:03,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:04,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:04,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-15 20:21:04,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977174493] [2020-10-15 20:21:04,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 20:21:04,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:04,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 20:21:04,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-15 20:21:04,015 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-15 20:21:04,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:04,082 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-15 20:21:04,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 20:21:04,082 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-15 20:21:04,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:04,083 INFO L225 Difference]: With dead ends: 54 [2020-10-15 20:21:04,083 INFO L226 Difference]: Without dead ends: 48 [2020-10-15 20:21:04,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:04,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-15 20:21:04,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-15 20:21:04,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 20:21:04,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-15 20:21:04,089 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-15 20:21:04,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:04,090 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-15 20:21:04,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 20:21:04,090 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-15 20:21:04,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:21:04,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:04,091 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:04,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:04,304 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:04,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:04,305 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-15 20:21:04,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:04,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578560051] [2020-10-15 20:21:04,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:04,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:04,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578560051] [2020-10-15 20:21:04,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050865448] [2020-10-15 20:21:04,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:04,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 20:21:04,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:04,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:21:04,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:04,482 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:04,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:04,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 20:21:04,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078036663] [2020-10-15 20:21:04,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:04,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:04,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:04,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:04,498 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-15 20:21:04,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:04,608 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-15 20:21:04,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 20:21:04,609 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 20:21:04,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:04,610 INFO L225 Difference]: With dead ends: 58 [2020-10-15 20:21:04,610 INFO L226 Difference]: Without dead ends: 52 [2020-10-15 20:21:04,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:04,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-15 20:21:04,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-15 20:21:04,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-15 20:21:04,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-15 20:21:04,616 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-15 20:21:04,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:04,616 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-15 20:21:04,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:04,617 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-15 20:21:04,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:21:04,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:04,618 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:04,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:04,827 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:04,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:04,828 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-15 20:21:04,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:04,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977896327] [2020-10-15 20:21:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:04,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977896327] [2020-10-15 20:21:04,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884418225] [2020-10-15 20:21:04,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:04,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:21:04,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:04,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:04,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-15 20:21:04,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295810445] [2020-10-15 20:21:04,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 20:21:04,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:04,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 20:21:04,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-15 20:21:04,989 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-15 20:21:05,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:05,127 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-15 20:21:05,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:05,128 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-15 20:21:05,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:05,129 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:21:05,129 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 20:21:05,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:05,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 20:21:05,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-15 20:21:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:05,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-15 20:21:05,136 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-15 20:21:05,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:05,136 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-15 20:21:05,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 20:21:05,136 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-15 20:21:05,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 20:21:05,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:05,137 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:05,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:05,346 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:05,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:05,346 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-15 20:21:05,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:05,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374022547] [2020-10-15 20:21:05,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:05,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374022547] [2020-10-15 20:21:05,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669178886] [2020-10-15 20:21:05,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:05,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:05,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:05,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 20:21:05,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:05,489 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:05,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:05,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 20:21:05,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79135815] [2020-10-15 20:21:05,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:05,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:05,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:05,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:05,505 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-15 20:21:05,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:05,670 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-15 20:21:05,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 20:21:05,671 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-15 20:21:05,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:05,672 INFO L225 Difference]: With dead ends: 62 [2020-10-15 20:21:05,672 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 20:21:05,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:05,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 20:21:05,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-15 20:21:05,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-15 20:21:05,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-15 20:21:05,680 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-15 20:21:05,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:05,685 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-15 20:21:05,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:05,685 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-15 20:21:05,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:05,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:05,686 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:05,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-15 20:21:05,901 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:05,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:05,902 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-15 20:21:05,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:05,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754946878] [2020-10-15 20:21:05,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:05,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754946878] [2020-10-15 20:21:05,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205552212] [2020-10-15 20:21:05,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:06,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 20:21:06,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:06,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:06,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:06,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:06,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-15 20:21:06,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235645517] [2020-10-15 20:21:06,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:06,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:06,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:06,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:06,041 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-15 20:21:06,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:06,146 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-15 20:21:06,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 20:21:06,147 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-15 20:21:06,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:06,147 INFO L225 Difference]: With dead ends: 64 [2020-10-15 20:21:06,148 INFO L226 Difference]: Without dead ends: 58 [2020-10-15 20:21:06,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:06,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-15 20:21:06,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-15 20:21:06,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 20:21:06,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-15 20:21:06,152 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-15 20:21:06,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:06,152 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-15 20:21:06,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:06,153 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-15 20:21:06,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:06,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:06,154 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:06,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:06,364 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:06,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:06,364 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-15 20:21:06,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:06,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703297098] [2020-10-15 20:21:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:06,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703297098] [2020-10-15 20:21:06,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922149199] [2020-10-15 20:21:06,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:06,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:06,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:06,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:06,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:06,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:06,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:06,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 20:21:06,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178815358] [2020-10-15 20:21:06,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:06,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:06,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:06,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:06,520 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-15 20:21:06,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:06,677 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-15 20:21:06,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 20:21:06,678 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 20:21:06,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:06,679 INFO L225 Difference]: With dead ends: 61 [2020-10-15 20:21:06,679 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 20:21:06,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:06,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 20:21:06,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-15 20:21:06,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 20:21:06,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-15 20:21:06,684 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-15 20:21:06,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:06,684 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-15 20:21:06,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:06,684 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-15 20:21:06,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:06,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:06,685 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:06,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:06,896 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:06,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:06,896 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-15 20:21:06,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:06,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159585566] [2020-10-15 20:21:06,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:06,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159585566] [2020-10-15 20:21:06,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485890001] [2020-10-15 20:21:06,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:07,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:07,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:07,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:07,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:07,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:07,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-15 20:21:07,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058696024] [2020-10-15 20:21:07,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 20:21:07,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:07,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 20:21:07,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-15 20:21:07,093 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-15 20:21:07,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:07,254 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-15 20:21:07,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:07,255 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-15 20:21:07,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:07,256 INFO L225 Difference]: With dead ends: 77 [2020-10-15 20:21:07,256 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 20:21:07,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:07,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 20:21:07,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-15 20:21:07,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 20:21:07,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-15 20:21:07,266 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-15 20:21:07,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:07,266 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-15 20:21:07,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 20:21:07,267 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-15 20:21:07,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:07,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:07,272 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:07,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-15 20:21:07,484 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:07,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:07,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-15 20:21:07,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:07,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253467881] [2020-10-15 20:21:07,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:07,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253467881] [2020-10-15 20:21:07,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148989246] [2020-10-15 20:21:07,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:07,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 20:21:07,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:07,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:07,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:07,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:07,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:07,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:07,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 20:21:07,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956277461] [2020-10-15 20:21:07,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:07,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:07,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:07,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:07,618 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-15 20:21:07,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:07,832 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-10-15 20:21:07,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:21:07,832 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 20:21:07,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:07,833 INFO L225 Difference]: With dead ends: 58 [2020-10-15 20:21:07,833 INFO L226 Difference]: Without dead ends: 50 [2020-10-15 20:21:07,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:21:07,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-15 20:21:07,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-15 20:21:07,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-15 20:21:07,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-15 20:21:07,837 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-15 20:21:07,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:07,837 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-15 20:21:07,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:07,837 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-15 20:21:07,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 20:21:07,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:07,838 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:08,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:08,048 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:08,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:08,049 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-15 20:21:08,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:08,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245236399] [2020-10-15 20:21:08,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:08,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245236399] [2020-10-15 20:21:08,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959173710] [2020-10-15 20:21:08,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:08,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:21:08,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:08,179 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:08,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:08,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 20:21:08,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574049852] [2020-10-15 20:21:08,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:08,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:08,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:08,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:08,189 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-15 20:21:08,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:08,357 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-15 20:21:08,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:08,358 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 20:21:08,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:08,359 INFO L225 Difference]: With dead ends: 60 [2020-10-15 20:21:08,359 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 20:21:08,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:21:08,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 20:21:08,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-15 20:21:08,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:08,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 20:21:08,362 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-15 20:21:08,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:08,363 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 20:21:08,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:08,363 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 20:21:08,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:08,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:08,364 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:08,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-15 20:21:08,567 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:08,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:08,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-15 20:21:08,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:08,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091081323] [2020-10-15 20:21:08,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:08,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:08,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091081323] [2020-10-15 20:21:08,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366069115] [2020-10-15 20:21:08,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:08,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:08,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:08,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:08,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:08,765 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:08,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:08,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 20:21:08,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224125469] [2020-10-15 20:21:08,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:08,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:08,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:08,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:08,780 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-15 20:21:08,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:08,957 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-15 20:21:08,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:08,958 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 20:21:08,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:08,959 INFO L225 Difference]: With dead ends: 54 [2020-10-15 20:21:08,959 INFO L226 Difference]: Without dead ends: 49 [2020-10-15 20:21:08,959 INFO L677 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 [2020-10-15 20:21:08,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-15 20:21:08,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-15 20:21:08,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-15 20:21:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-15 20:21:08,962 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-15 20:21:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:08,962 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-15 20:21:08,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:08,962 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-15 20:21:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:08,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:08,963 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:09,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-15 20:21:09,172 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:09,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:09,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-15 20:21:09,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:09,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745307537] [2020-10-15 20:21:09,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:09,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745307537] [2020-10-15 20:21:09,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378701197] [2020-10-15 20:21:09,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:09,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:21:09,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:09,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:09,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:09,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:09,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 20:21:09,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293449210] [2020-10-15 20:21:09,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:09,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:09,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:09,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:09,310 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-15 20:21:09,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:09,406 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-15 20:21:09,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 20:21:09,406 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 20:21:09,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:09,407 INFO L225 Difference]: With dead ends: 60 [2020-10-15 20:21:09,407 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 20:21:09,408 INFO L677 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 [2020-10-15 20:21:09,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 20:21:09,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-15 20:21:09,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:09,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-15 20:21:09,413 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-15 20:21:09,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:09,413 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-15 20:21:09,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:09,414 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-15 20:21:09,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:09,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:09,414 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:09,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 20:21:09,615 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:09,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:09,616 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-15 20:21:09,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:09,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729867359] [2020-10-15 20:21:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:09,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729867359] [2020-10-15 20:21:09,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590021480] [2020-10-15 20:21:09,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:09,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:09,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:09,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:09,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:09,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:09,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:09,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 20:21:09,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233867224] [2020-10-15 20:21:09,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:09,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:09,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:09,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:09,776 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-15 20:21:09,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:09,905 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-15 20:21:09,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 20:21:09,906 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 20:21:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:09,906 INFO L225 Difference]: With dead ends: 66 [2020-10-15 20:21:09,907 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 20:21:09,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:09,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 20:21:09,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-15 20:21:09,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 20:21:09,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-15 20:21:09,912 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-15 20:21:09,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:09,912 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-15 20:21:09,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:09,912 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-15 20:21:09,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:09,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:09,913 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:10,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 20:21:10,122 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:10,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:10,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-15 20:21:10,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:10,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439785654] [2020-10-15 20:21:10,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:10,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439785654] [2020-10-15 20:21:10,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974771002] [2020-10-15 20:21:10,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:10,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:21:10,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:10,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:10,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:10,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:10,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 20:21:10,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459904472] [2020-10-15 20:21:10,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:10,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:10,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:10,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:10,240 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-15 20:21:10,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:10,394 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-15 20:21:10,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:21:10,397 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 20:21:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:10,397 INFO L225 Difference]: With dead ends: 67 [2020-10-15 20:21:10,398 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 20:21:10,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:21:10,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 20:21:10,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-15 20:21:10,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-15 20:21:10,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-15 20:21:10,401 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-15 20:21:10,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:10,401 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-15 20:21:10,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:10,401 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-15 20:21:10,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:10,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:10,402 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:10,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:10,610 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:10,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:10,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-15 20:21:10,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:10,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887287662] [2020-10-15 20:21:10,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:10,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887287662] [2020-10-15 20:21:10,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662085347] [2020-10-15 20:21:10,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:10,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:21:10,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:10,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:10,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:10,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:10,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:10,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 20:21:10,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040231384] [2020-10-15 20:21:10,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:10,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:10,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:10,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:10,762 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-15 20:21:10,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:10,972 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-15 20:21:10,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:21:10,972 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 20:21:10,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:10,973 INFO L225 Difference]: With dead ends: 69 [2020-10-15 20:21:10,973 INFO L226 Difference]: Without dead ends: 63 [2020-10-15 20:21:10,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:21:10,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-15 20:21:10,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-15 20:21:10,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:10,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-15 20:21:10,976 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-15 20:21:10,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:10,976 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-15 20:21:10,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:10,976 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-15 20:21:10,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:10,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:10,977 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:11,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:11,185 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:11,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:11,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-15 20:21:11,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:11,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335639705] [2020-10-15 20:21:11,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:11,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335639705] [2020-10-15 20:21:11,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174578872] [2020-10-15 20:21:11,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:11,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:11,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:11,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:11,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-15 20:21:11,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68583940] [2020-10-15 20:21:11,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:21:11,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:11,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:21:11,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-15 20:21:11,308 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-15 20:21:11,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:11,496 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-15 20:21:11,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:11,502 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-15 20:21:11,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:11,503 INFO L225 Difference]: With dead ends: 88 [2020-10-15 20:21:11,503 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 20:21:11,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:21:11,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 20:21:11,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-15 20:21:11,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 20:21:11,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-15 20:21:11,507 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-15 20:21:11,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:11,508 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-15 20:21:11,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:21:11,508 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-15 20:21:11,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 20:21:11,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:11,508 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:11,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:11,720 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:11,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:11,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-15 20:21:11,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:11,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032437570] [2020-10-15 20:21:11,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:11,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032437570] [2020-10-15 20:21:11,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822144584] [2020-10-15 20:21:11,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:11,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:11,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:11,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 20:21:11,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:11,836 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:11,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:11,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 20:21:11,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842818678] [2020-10-15 20:21:11,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:11,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:11,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:11,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:11,848 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-15 20:21:12,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:12,102 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-15 20:21:12,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:12,103 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-15 20:21:12,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:12,103 INFO L225 Difference]: With dead ends: 69 [2020-10-15 20:21:12,103 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 20:21:12,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:21:12,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 20:21:12,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-15 20:21:12,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 20:21:12,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-15 20:21:12,108 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-15 20:21:12,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:12,108 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-15 20:21:12,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:12,108 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-15 20:21:12,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:12,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:12,109 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:12,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-15 20:21:12,319 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:12,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:12,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-15 20:21:12,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:12,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930634635] [2020-10-15 20:21:12,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:12,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:12,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930634635] [2020-10-15 20:21:12,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95122488] [2020-10-15 20:21:12,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:12,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:21:12,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:12,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:12,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:12,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:12,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:12,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 20:21:12,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290566433] [2020-10-15 20:21:12,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:12,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:12,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:12,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:12,490 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-15 20:21:12,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:12,611 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-15 20:21:12,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:12,612 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 20:21:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:12,613 INFO L225 Difference]: With dead ends: 74 [2020-10-15 20:21:12,613 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 20:21:12,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:21:12,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 20:21:12,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-15 20:21:12,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 20:21:12,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 20:21:12,616 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-15 20:21:12,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:12,616 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 20:21:12,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:12,616 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 20:21:12,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:12,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:12,617 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:12,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-15 20:21:12,826 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:12,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:12,826 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-15 20:21:12,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:12,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284071750] [2020-10-15 20:21:12,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:12,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284071750] [2020-10-15 20:21:12,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664122608] [2020-10-15 20:21:12,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:12,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:12,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:12,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:12,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:12,961 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:12,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:12,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 20:21:12,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848295971] [2020-10-15 20:21:12,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:12,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:12,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:12,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:12,972 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-15 20:21:13,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:13,188 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-15 20:21:13,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:21:13,189 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 20:21:13,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:13,190 INFO L225 Difference]: With dead ends: 71 [2020-10-15 20:21:13,190 INFO L226 Difference]: Without dead ends: 65 [2020-10-15 20:21:13,191 INFO L677 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 [2020-10-15 20:21:13,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-15 20:21:13,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-15 20:21:13,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:21:13,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 20:21:13,193 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-15 20:21:13,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:13,194 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 20:21:13,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:13,194 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 20:21:13,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:13,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:13,194 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:13,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-15 20:21:13,403 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:13,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:13,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-15 20:21:13,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:13,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888282181] [2020-10-15 20:21:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:13,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888282181] [2020-10-15 20:21:13,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295956229] [2020-10-15 20:21:13,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:13,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:21:13,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:13,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:13,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:13,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:13,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:13,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 20:21:13,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45440611] [2020-10-15 20:21:13,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:13,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:13,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:13,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:13,547 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-15 20:21:13,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:13,694 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-15 20:21:13,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:21:13,694 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 20:21:13,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:13,697 INFO L225 Difference]: With dead ends: 68 [2020-10-15 20:21:13,697 INFO L226 Difference]: Without dead ends: 62 [2020-10-15 20:21:13,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:21:13,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-15 20:21:13,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-15 20:21:13,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 20:21:13,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 20:21:13,701 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-15 20:21:13,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:13,701 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 20:21:13,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:13,701 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 20:21:13,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:13,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:13,702 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:13,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-15 20:21:13,906 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:13,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:13,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-15 20:21:13,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:13,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122145252] [2020-10-15 20:21:13,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:13,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122145252] [2020-10-15 20:21:13,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512813974] [2020-10-15 20:21:13,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:14,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:21:14,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:14,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:14,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:14,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:14,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:14,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:14,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 20:21:14,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058711158] [2020-10-15 20:21:14,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:14,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:14,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:14,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:14,106 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-15 20:21:14,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:14,352 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-15 20:21:14,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:14,352 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 20:21:14,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:14,353 INFO L225 Difference]: With dead ends: 67 [2020-10-15 20:21:14,353 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 20:21:14,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:21:14,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 20:21:14,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-15 20:21:14,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:21:14,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 20:21:14,356 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-15 20:21:14,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:14,356 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 20:21:14,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:14,357 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 20:21:14,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:14,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:14,357 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:14,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-15 20:21:14,564 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:14,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:14,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-15 20:21:14,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:14,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364708543] [2020-10-15 20:21:14,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:14,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364708543] [2020-10-15 20:21:14,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381484351] [2020-10-15 20:21:14,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:14,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:14,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:14,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:14,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-15 20:21:14,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752707829] [2020-10-15 20:21:14,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 20:21:14,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:14,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 20:21:14,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-15 20:21:14,675 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-15 20:21:14,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:14,864 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-15 20:21:14,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:14,864 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-15 20:21:14,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:14,865 INFO L225 Difference]: With dead ends: 83 [2020-10-15 20:21:14,865 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 20:21:14,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:21:14,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 20:21:14,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-15 20:21:14,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 20:21:14,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-15 20:21:14,868 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-15 20:21:14,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:14,869 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-15 20:21:14,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 20:21:14,869 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-15 20:21:14,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:14,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:14,869 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:15,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:15,078 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:15,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:15,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-15 20:21:15,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:15,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072679097] [2020-10-15 20:21:15,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:15,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072679097] [2020-10-15 20:21:15,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650767790] [2020-10-15 20:21:15,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:15,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:15,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:15,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:15,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:15,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:15,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 20:21:15,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818616338] [2020-10-15 20:21:15,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:15,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:15,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:15,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:15,244 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-15 20:21:15,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:15,491 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-10-15 20:21:15,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:15,493 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 20:21:15,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:15,494 INFO L225 Difference]: With dead ends: 62 [2020-10-15 20:21:15,495 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 20:21:15,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:21:15,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 20:21:15,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-15 20:21:15,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-15 20:21:15,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-15 20:21:15,497 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-15 20:21:15,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:15,497 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-15 20:21:15,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:15,497 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-15 20:21:15,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:21:15,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:15,498 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:15,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-15 20:21:15,706 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:15,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:15,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-15 20:21:15,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:15,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374218665] [2020-10-15 20:21:15,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:15,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374218665] [2020-10-15 20:21:15,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077367331] [2020-10-15 20:21:15,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:15,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:21:15,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:15,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 20:21:15,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:15,842 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:15,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:15,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 20:21:15,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190999807] [2020-10-15 20:21:15,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:15,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:15,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:15,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:15,858 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-15 20:21:16,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:16,115 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-15 20:21:16,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:16,116 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 20:21:16,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:16,116 INFO L225 Difference]: With dead ends: 68 [2020-10-15 20:21:16,116 INFO L226 Difference]: Without dead ends: 63 [2020-10-15 20:21:16,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:21:16,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-15 20:21:16,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-15 20:21:16,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 20:21:16,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-15 20:21:16,119 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-15 20:21:16,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:16,119 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-15 20:21:16,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:16,120 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-15 20:21:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:16,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:16,120 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:16,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-15 20:21:16,321 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:16,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:16,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-15 20:21:16,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:16,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345001598] [2020-10-15 20:21:16,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:16,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345001598] [2020-10-15 20:21:16,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584037480] [2020-10-15 20:21:16,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:16,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:16,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:16,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:16,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:16,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:16,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:16,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:21:16,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373269363] [2020-10-15 20:21:16,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:16,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:16,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:16,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:16,463 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-15 20:21:16,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:16,757 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-15 20:21:16,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:16,758 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:21:16,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:16,759 INFO L225 Difference]: With dead ends: 60 [2020-10-15 20:21:16,759 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 20:21:16,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:21:16,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 20:21:16,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-15 20:21:16,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-15 20:21:16,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-15 20:21:16,762 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-15 20:21:16,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:16,763 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-15 20:21:16,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:16,763 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-15 20:21:16,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:16,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:16,763 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:16,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:16,972 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:16,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:16,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-15 20:21:16,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:16,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514742311] [2020-10-15 20:21:16,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:17,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514742311] [2020-10-15 20:21:17,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635986584] [2020-10-15 20:21:17,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:17,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:21:17,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:17,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:17,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:17,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:17,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 20:21:17,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991884267] [2020-10-15 20:21:17,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:17,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:17,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:17,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:17,114 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-15 20:21:17,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:17,260 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-15 20:21:17,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:21:17,260 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 20:21:17,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:17,261 INFO L225 Difference]: With dead ends: 66 [2020-10-15 20:21:17,261 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 20:21:17,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:21:17,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 20:21:17,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-15 20:21:17,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:21:17,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-15 20:21:17,264 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-15 20:21:17,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:17,264 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-15 20:21:17,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:17,265 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-15 20:21:17,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:17,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:17,265 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:17,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:17,473 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:17,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:17,473 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-15 20:21:17,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:17,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093182506] [2020-10-15 20:21:17,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:17,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093182506] [2020-10-15 20:21:17,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160701241] [2020-10-15 20:21:17,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:17,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 20:21:17,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:17,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:17,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:17,618 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:17,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:17,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:21:17,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548585394] [2020-10-15 20:21:17,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:17,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:17,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:17,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:17,630 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-15 20:21:17,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:17,783 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-15 20:21:17,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:21:17,784 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:21:17,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:17,784 INFO L225 Difference]: With dead ends: 74 [2020-10-15 20:21:17,784 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 20:21:17,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:21:17,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 20:21:17,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-15 20:21:17,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-15 20:21:17,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-15 20:21:17,788 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-15 20:21:17,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:17,790 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-15 20:21:17,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:17,790 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-15 20:21:17,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:17,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:17,791 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:17,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-15 20:21:17,992 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:17,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:17,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-15 20:21:17,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:17,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56561756] [2020-10-15 20:21:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:18,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56561756] [2020-10-15 20:21:18,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501774511] [2020-10-15 20:21:18,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:18,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:18,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:18,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:18,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 20:21:18,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839216377] [2020-10-15 20:21:18,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:18,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:18,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:18,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:18,123 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-15 20:21:18,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:18,314 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-15 20:21:18,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:18,315 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 20:21:18,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:18,316 INFO L225 Difference]: With dead ends: 75 [2020-10-15 20:21:18,316 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 20:21:18,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:21:18,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 20:21:18,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-15 20:21:18,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 20:21:18,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-15 20:21:18,320 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-15 20:21:18,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:18,320 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-15 20:21:18,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:18,320 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-15 20:21:18,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:18,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:18,321 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:18,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:18,531 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:18,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:18,531 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-15 20:21:18,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:18,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178659798] [2020-10-15 20:21:18,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:18,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178659798] [2020-10-15 20:21:18,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131950959] [2020-10-15 20:21:18,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:18,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:18,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:18,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:18,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:18,702 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:18,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:18,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:21:18,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051803077] [2020-10-15 20:21:18,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:18,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:18,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:18,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:18,718 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-15 20:21:18,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:18,997 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-15 20:21:18,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:18,997 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:21:18,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:18,998 INFO L225 Difference]: With dead ends: 79 [2020-10-15 20:21:18,998 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 20:21:18,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:21:18,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 20:21:19,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-15 20:21:19,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:21:19,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-15 20:21:19,002 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-15 20:21:19,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:19,002 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-15 20:21:19,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:19,002 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-15 20:21:19,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:19,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:19,003 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:19,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-15 20:21:19,211 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:19,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:19,212 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-15 20:21:19,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:19,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689083754] [2020-10-15 20:21:19,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:19,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:19,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689083754] [2020-10-15 20:21:19,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948580413] [2020-10-15 20:21:19,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:19,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:21:19,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:19,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:19,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:19,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:19,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 20:21:19,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168222500] [2020-10-15 20:21:19,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:19,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:19,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:19,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:19,358 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-15 20:21:19,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:19,600 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-15 20:21:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:21:19,600 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 20:21:19,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:19,601 INFO L225 Difference]: With dead ends: 79 [2020-10-15 20:21:19,601 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 20:21:19,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:21:19,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 20:21:19,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-15 20:21:19,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 20:21:19,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-15 20:21:19,604 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-15 20:21:19,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:19,605 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-15 20:21:19,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:19,605 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-15 20:21:19,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:19,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:19,605 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:19,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:19,816 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:19,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:19,816 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-15 20:21:19,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:19,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413676877] [2020-10-15 20:21:19,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:19,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413676877] [2020-10-15 20:21:19,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804102634] [2020-10-15 20:21:19,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:19,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:19,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:19,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:19,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:19,949 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:19,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:19,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:21:19,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536942484] [2020-10-15 20:21:19,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:19,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:19,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:19,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:19,959 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-15 20:21:20,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:20,248 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-15 20:21:20,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:21:20,248 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:21:20,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:20,249 INFO L225 Difference]: With dead ends: 76 [2020-10-15 20:21:20,249 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 20:21:20,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:21:20,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 20:21:20,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-15 20:21:20,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 20:21:20,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-15 20:21:20,253 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-15 20:21:20,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:20,253 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-15 20:21:20,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:20,254 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-15 20:21:20,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:20,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:20,254 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:20,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-15 20:21:20,455 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:20,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:20,455 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-15 20:21:20,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:20,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739181574] [2020-10-15 20:21:20,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:20,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739181574] [2020-10-15 20:21:20,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950500042] [2020-10-15 20:21:20,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:20,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:21:20,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:20,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:20,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:20,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:20,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-15 20:21:20,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156754083] [2020-10-15 20:21:20,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 20:21:20,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:20,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 20:21:20,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-15 20:21:20,595 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-15 20:21:20,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:20,874 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-15 20:21:20,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:20,875 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-15 20:21:20,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:20,875 INFO L225 Difference]: With dead ends: 96 [2020-10-15 20:21:20,876 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 20:21:20,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:21:20,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 20:21:20,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-15 20:21:20,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:21:20,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-15 20:21:20,879 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-15 20:21:20,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:20,879 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-15 20:21:20,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 20:21:20,879 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-15 20:21:20,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:21:20,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:20,880 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:21,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-15 20:21:21,089 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:21,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:21,089 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-15 20:21:21,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:21,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581945757] [2020-10-15 20:21:21,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:21,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581945757] [2020-10-15 20:21:21,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190495980] [2020-10-15 20:21:21,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:21,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 20:21:21,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:21,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:21:21,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:21,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:21,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:21,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-15 20:21:21,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682296871] [2020-10-15 20:21:21,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:21,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:21,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:21,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:21,230 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-15 20:21:21,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:21,591 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-15 20:21:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:21:21,592 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-15 20:21:21,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:21,593 INFO L225 Difference]: With dead ends: 77 [2020-10-15 20:21:21,593 INFO L226 Difference]: Without dead ends: 69 [2020-10-15 20:21:21,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:21:21,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-15 20:21:21,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-15 20:21:21,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 20:21:21,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-15 20:21:21,596 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-15 20:21:21,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:21,597 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-15 20:21:21,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:21,597 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-15 20:21:21,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:21,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:21,597 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:21,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-15 20:21:21,806 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:21,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:21,806 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-15 20:21:21,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:21,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622866660] [2020-10-15 20:21:21,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:21,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622866660] [2020-10-15 20:21:21,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595864836] [2020-10-15 20:21:21,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:21,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:21,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:21,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:21,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 20:21:21,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036909060] [2020-10-15 20:21:21,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:21,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:21,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:21,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:21,962 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-15 20:21:22,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:22,127 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-15 20:21:22,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:21:22,127 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 20:21:22,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:22,128 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:21:22,128 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 20:21:22,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:21:22,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 20:21:22,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-15 20:21:22,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:21:22,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 20:21:22,131 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 20:21:22,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:22,131 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 20:21:22,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:22,131 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 20:21:22,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:22,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:22,132 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:22,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-15 20:21:22,333 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:22,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:22,333 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-15 20:21:22,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:22,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702345402] [2020-10-15 20:21:22,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:22,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702345402] [2020-10-15 20:21:22,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264810398] [2020-10-15 20:21:22,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:22,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:22,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:22,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:22,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:22,547 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:22,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:22,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:21:22,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112704061] [2020-10-15 20:21:22,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:22,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:22,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:22,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:22,565 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 20:21:22,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:22,830 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-15 20:21:22,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:22,830 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:21:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:22,831 INFO L225 Difference]: With dead ends: 81 [2020-10-15 20:21:22,831 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 20:21:22,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:21:22,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 20:21:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-15 20:21:22,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:21:22,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 20:21:22,834 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 20:21:22,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:22,834 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 20:21:22,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:22,835 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 20:21:22,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:22,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:22,835 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:23,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-15 20:21:23,043 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:23,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:23,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-15 20:21:23,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:23,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288809662] [2020-10-15 20:21:23,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:23,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288809662] [2020-10-15 20:21:23,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115528719] [2020-10-15 20:21:23,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:23,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:21:23,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:23,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:23,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:23,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:23,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 20:21:23,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118769273] [2020-10-15 20:21:23,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:23,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:23,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:23,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:23,187 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 20:21:23,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:23,397 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-15 20:21:23,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:23,398 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 20:21:23,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:23,399 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:21:23,399 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 20:21:23,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:21:23,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 20:21:23,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-15 20:21:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:21:23,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 20:21:23,403 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 20:21:23,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:23,403 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 20:21:23,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:23,403 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 20:21:23,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:23,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:23,404 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:23,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-15 20:21:23,608 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:23,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:23,608 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-15 20:21:23,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:23,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655774792] [2020-10-15 20:21:23,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:23,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655774792] [2020-10-15 20:21:23,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129712624] [2020-10-15 20:21:23,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:23,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:23,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:23,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:23,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:23,750 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:23,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:23,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:21:23,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379580219] [2020-10-15 20:21:23,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:23,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:23,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:23,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:23,775 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 20:21:24,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:24,080 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-15 20:21:24,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:21:24,081 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:21:24,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:24,082 INFO L225 Difference]: With dead ends: 77 [2020-10-15 20:21:24,082 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 20:21:24,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:21:24,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 20:21:24,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-15 20:21:24,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:21:24,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 20:21:24,086 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 20:21:24,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:24,086 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 20:21:24,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:24,086 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 20:21:24,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:24,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:24,087 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:24,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-15 20:21:24,287 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:24,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:24,288 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-15 20:21:24,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:24,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891172914] [2020-10-15 20:21:24,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:24,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891172914] [2020-10-15 20:21:24,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364654343] [2020-10-15 20:21:24,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:24,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:21:24,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:24,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:24,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:24,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:24,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 20:21:24,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458039215] [2020-10-15 20:21:24,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:24,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:24,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:24,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:24,465 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 20:21:24,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:24,704 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-15 20:21:24,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:21:24,704 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 20:21:24,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:24,705 INFO L225 Difference]: With dead ends: 74 [2020-10-15 20:21:24,705 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 20:21:24,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:21:24,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 20:21:24,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-15 20:21:24,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:21:24,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 20:21:24,709 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-15 20:21:24,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:24,711 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 20:21:24,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:24,711 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 20:21:24,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:24,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:24,711 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:24,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:24,912 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:24,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:24,913 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-15 20:21:24,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:24,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48435173] [2020-10-15 20:21:24,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:24,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:24,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48435173] [2020-10-15 20:21:24,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114550660] [2020-10-15 20:21:24,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:25,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 20:21:25,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:25,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:25,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:25,051 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:25,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:25,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:21:25,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34017158] [2020-10-15 20:21:25,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:25,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:25,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:25,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:25,067 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-15 20:21:25,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:25,419 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-15 20:21:25,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:21:25,423 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:21:25,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:25,424 INFO L225 Difference]: With dead ends: 73 [2020-10-15 20:21:25,424 INFO L226 Difference]: Without dead ends: 67 [2020-10-15 20:21:25,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:21:25,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-15 20:21:25,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-15 20:21:25,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:21:25,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 20:21:25,427 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-15 20:21:25,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:25,427 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 20:21:25,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:25,427 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 20:21:25,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:25,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:25,428 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:25,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-15 20:21:25,638 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:25,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:25,639 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-15 20:21:25,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:25,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756076113] [2020-10-15 20:21:25,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:25,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756076113] [2020-10-15 20:21:25,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911145447] [2020-10-15 20:21:25,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:25,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:25,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:25,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:25,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-15 20:21:25,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470292771] [2020-10-15 20:21:25,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 20:21:25,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:25,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 20:21:25,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-15 20:21:25,778 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-15 20:21:26,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:26,081 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-15 20:21:26,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:26,086 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-15 20:21:26,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:26,087 INFO L225 Difference]: With dead ends: 89 [2020-10-15 20:21:26,087 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 20:21:26,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:21:26,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 20:21:26,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-15 20:21:26,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 20:21:26,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-15 20:21:26,090 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-15 20:21:26,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:26,091 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-15 20:21:26,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 20:21:26,091 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-15 20:21:26,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:26,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:26,091 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:26,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:26,300 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:26,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:26,300 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-15 20:21:26,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:26,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944179901] [2020-10-15 20:21:26,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:26,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944179901] [2020-10-15 20:21:26,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599811440] [2020-10-15 20:21:26,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:26,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:26,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:26,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:26,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:26,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:26,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:26,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:21:26,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550472716] [2020-10-15 20:21:26,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:26,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:26,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:26,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:26,448 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-15 20:21:26,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:26,852 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-10-15 20:21:26,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:21:26,853 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:21:26,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:26,854 INFO L225 Difference]: With dead ends: 70 [2020-10-15 20:21:26,854 INFO L226 Difference]: Without dead ends: 62 [2020-10-15 20:21:26,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:21:26,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-15 20:21:26,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-10-15 20:21:26,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-15 20:21:26,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-15 20:21:26,861 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-15 20:21:26,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:26,861 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-15 20:21:26,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:26,862 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-15 20:21:26,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 20:21:26,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:26,862 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:27,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-15 20:21:27,063 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:27,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:27,063 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-15 20:21:27,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:27,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941125272] [2020-10-15 20:21:27,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:27,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941125272] [2020-10-15 20:21:27,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985898865] [2020-10-15 20:21:27,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:27,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:21:27,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:27,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:21:27,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:27,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:27,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:27,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 20:21:27,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53258490] [2020-10-15 20:21:27,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:27,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:27,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:27,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:27,210 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-15 20:21:27,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:27,589 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-15 20:21:27,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:27,589 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-15 20:21:27,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:27,590 INFO L225 Difference]: With dead ends: 76 [2020-10-15 20:21:27,590 INFO L226 Difference]: Without dead ends: 71 [2020-10-15 20:21:27,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:21:27,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-15 20:21:27,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-15 20:21:27,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:21:27,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-15 20:21:27,595 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-15 20:21:27,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:27,595 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-15 20:21:27,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:27,595 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-15 20:21:27,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:27,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:27,596 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:27,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:27,804 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:27,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:27,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-15 20:21:27,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:27,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514425534] [2020-10-15 20:21:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:27,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514425534] [2020-10-15 20:21:27,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481502816] [2020-10-15 20:21:27,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:27,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:27,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:27,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:27,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:27,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:27,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:27,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:21:27,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149843934] [2020-10-15 20:21:27,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:27,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:27,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:27,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:27,985 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-15 20:21:28,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:28,393 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-15 20:21:28,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:28,393 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:21:28,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:28,394 INFO L225 Difference]: With dead ends: 66 [2020-10-15 20:21:28,394 INFO L226 Difference]: Without dead ends: 61 [2020-10-15 20:21:28,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:21:28,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-15 20:21:28,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-15 20:21:28,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-15 20:21:28,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-15 20:21:28,398 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-15 20:21:28,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:28,398 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-15 20:21:28,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:28,398 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-15 20:21:28,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:28,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:28,399 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:28,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-15 20:21:28,608 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:28,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:28,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-15 20:21:28,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:28,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670079285] [2020-10-15 20:21:28,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:28,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670079285] [2020-10-15 20:21:28,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787114798] [2020-10-15 20:21:28,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:28,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 20:21:28,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:28,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:28,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:28,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:28,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:21:28,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110032806] [2020-10-15 20:21:28,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:28,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:28,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:28,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:28,814 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-15 20:21:29,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:29,020 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-15 20:21:29,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:21:29,021 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:21:29,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:29,022 INFO L225 Difference]: With dead ends: 72 [2020-10-15 20:21:29,022 INFO L226 Difference]: Without dead ends: 66 [2020-10-15 20:21:29,022 INFO L677 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 [2020-10-15 20:21:29,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-15 20:21:29,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-15 20:21:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 20:21:29,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-15 20:21:29,025 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-15 20:21:29,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:29,025 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-15 20:21:29,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:29,025 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-15 20:21:29,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:29,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:29,026 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:29,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-15 20:21:29,236 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:29,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:29,237 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-15 20:21:29,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:29,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331256554] [2020-10-15 20:21:29,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:29,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331256554] [2020-10-15 20:21:29,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048988032] [2020-10-15 20:21:29,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:29,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 20:21:29,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:29,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:29,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:29,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:29,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:29,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:21:29,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837002377] [2020-10-15 20:21:29,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:29,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:29,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:29,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:29,505 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-15 20:21:29,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:29,798 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-15 20:21:29,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:21:29,798 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:21:29,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:29,799 INFO L225 Difference]: With dead ends: 82 [2020-10-15 20:21:29,800 INFO L226 Difference]: Without dead ends: 76 [2020-10-15 20:21:29,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:21:29,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-15 20:21:29,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-15 20:21:29,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-15 20:21:29,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-15 20:21:29,804 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-15 20:21:29,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:29,804 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-15 20:21:29,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:29,804 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-15 20:21:29,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:29,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:29,805 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:30,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-15 20:21:30,015 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:30,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:30,016 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-15 20:21:30,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:30,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490087899] [2020-10-15 20:21:30,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:30,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490087899] [2020-10-15 20:21:30,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767707375] [2020-10-15 20:21:30,111 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:30,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:30,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:30,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:30,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:30,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:21:30,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482239224] [2020-10-15 20:21:30,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:30,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:30,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:30,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:30,175 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-15 20:21:30,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:30,407 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-15 20:21:30,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:21:30,408 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:21:30,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:30,409 INFO L225 Difference]: With dead ends: 83 [2020-10-15 20:21:30,409 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 20:21:30,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:21:30,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 20:21:30,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-15 20:21:30,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 20:21:30,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-15 20:21:30,412 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-15 20:21:30,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:30,413 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-15 20:21:30,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:30,413 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-15 20:21:30,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:30,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:30,413 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:30,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-15 20:21:30,617 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:30,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:30,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-15 20:21:30,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:30,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551674880] [2020-10-15 20:21:30,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:30,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551674880] [2020-10-15 20:21:30,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592275438] [2020-10-15 20:21:30,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:30,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:30,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:30,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:30,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:30,812 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:30,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:30,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:21:30,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342268650] [2020-10-15 20:21:30,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:30,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:30,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:30,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:30,828 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-15 20:21:31,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:31,104 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-15 20:21:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:21:31,108 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:21:31,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:31,108 INFO L225 Difference]: With dead ends: 89 [2020-10-15 20:21:31,108 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 20:21:31,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:21:31,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 20:21:31,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-15 20:21:31,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 20:21:31,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-15 20:21:31,110 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-15 20:21:31,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:31,111 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-15 20:21:31,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:31,111 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-15 20:21:31,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:31,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:31,111 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:31,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:31,316 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:31,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:31,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-15 20:21:31,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:31,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049185792] [2020-10-15 20:21:31,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:31,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049185792] [2020-10-15 20:21:31,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2385405] [2020-10-15 20:21:31,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:31,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 20:21:31,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:31,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:31,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:31,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:31,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:21:31,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678018710] [2020-10-15 20:21:31,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:31,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:31,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:31,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:31,472 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-15 20:21:31,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:31,750 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-15 20:21:31,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:31,750 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:21:31,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:31,751 INFO L225 Difference]: With dead ends: 89 [2020-10-15 20:21:31,751 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 20:21:31,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:21:31,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 20:21:31,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-15 20:21:31,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:21:31,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-15 20:21:31,755 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-15 20:21:31,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:31,755 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-15 20:21:31,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:31,755 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-15 20:21:31,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:31,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:31,756 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:31,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:31,964 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:31,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:31,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-15 20:21:31,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:31,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827139572] [2020-10-15 20:21:31,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:32,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827139572] [2020-10-15 20:21:32,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696729995] [2020-10-15 20:21:32,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:32,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:32,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:32,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:32,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:32,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:32,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:32,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:21:32,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011370914] [2020-10-15 20:21:32,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:32,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:32,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:32,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:32,130 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-15 20:21:32,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:32,479 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-15 20:21:32,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:21:32,480 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:21:32,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:32,481 INFO L225 Difference]: With dead ends: 86 [2020-10-15 20:21:32,481 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 20:21:32,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:21:32,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 20:21:32,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-15 20:21:32,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:21:32,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-15 20:21:32,485 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-15 20:21:32,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:32,485 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-15 20:21:32,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:32,485 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-15 20:21:32,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:32,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:32,486 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:32,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-15 20:21:32,686 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:32,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:32,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-15 20:21:32,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:32,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471427374] [2020-10-15 20:21:32,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:32,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471427374] [2020-10-15 20:21:32,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432625575] [2020-10-15 20:21:32,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:32,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 20:21:32,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:32,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:32,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:32,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:32,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:32,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:21:32,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408038086] [2020-10-15 20:21:32,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:32,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:32,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:32,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:32,871 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-15 20:21:33,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:33,252 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-15 20:21:33,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:21:33,252 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:21:33,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:33,253 INFO L225 Difference]: With dead ends: 87 [2020-10-15 20:21:33,253 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 20:21:33,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:21:33,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 20:21:33,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-15 20:21:33,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 20:21:33,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-15 20:21:33,256 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-15 20:21:33,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:33,256 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-15 20:21:33,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:33,256 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-15 20:21:33,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:33,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:33,257 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:33,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:33,464 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:33,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:33,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-15 20:21:33,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:33,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873453395] [2020-10-15 20:21:33,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:33,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873453395] [2020-10-15 20:21:33,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814884454] [2020-10-15 20:21:33,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:33,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 20:21:33,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:33,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:33,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:33,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:33,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:33,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:33,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:21:33,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885879079] [2020-10-15 20:21:33,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:33,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:33,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:33,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:33,649 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-15 20:21:34,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:34,090 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-15 20:21:34,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:21:34,090 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:21:34,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:34,091 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:21:34,091 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 20:21:34,092 INFO L677 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 [2020-10-15 20:21:34,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 20:21:34,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-15 20:21:34,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:21:34,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-15 20:21:34,094 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-15 20:21:34,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:34,094 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-15 20:21:34,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:34,095 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-15 20:21:34,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:34,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:34,095 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:34,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-15 20:21:34,303 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:34,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:34,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-15 20:21:34,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:34,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206289694] [2020-10-15 20:21:34,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:34,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206289694] [2020-10-15 20:21:34,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85790419] [2020-10-15 20:21:34,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:34,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:34,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:34,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:34,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-15 20:21:34,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769234589] [2020-10-15 20:21:34,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:21:34,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:34,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:21:34,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 20:21:34,444 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-15 20:21:34,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:34,814 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-15 20:21:34,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:21:34,816 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-15 20:21:34,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:34,817 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:21:34,817 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 20:21:34,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:21:34,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 20:21:34,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-15 20:21:34,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 20:21:34,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-15 20:21:34,820 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-15 20:21:34,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:34,820 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-15 20:21:34,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:21:34,820 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-15 20:21:34,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 20:21:34,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:34,821 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:35,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-15 20:21:35,029 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:35,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:35,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-15 20:21:35,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:35,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898341375] [2020-10-15 20:21:35,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:35,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898341375] [2020-10-15 20:21:35,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174527058] [2020-10-15 20:21:35,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:35,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:35,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:35,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 20:21:35,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:35,182 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:35,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:35,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 20:21:35,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200186659] [2020-10-15 20:21:35,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:35,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:35,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:35,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:35,196 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-15 20:21:35,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:35,652 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-15 20:21:35,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:21:35,653 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-15 20:21:35,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:35,653 INFO L225 Difference]: With dead ends: 85 [2020-10-15 20:21:35,654 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 20:21:35,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:21:35,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 20:21:35,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-15 20:21:35,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 20:21:35,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-15 20:21:35,656 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-15 20:21:35,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:35,656 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-15 20:21:35,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:35,656 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-15 20:21:35,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:35,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:35,657 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:35,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-15 20:21:35,861 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:35,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:35,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-15 20:21:35,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:35,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136154914] [2020-10-15 20:21:35,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:35,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136154914] [2020-10-15 20:21:35,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96325580] [2020-10-15 20:21:35,971 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:36,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 20:21:36,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:36,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:36,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:36,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:36,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:21:36,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812070601] [2020-10-15 20:21:36,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:36,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:36,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:36,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:36,035 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-15 20:21:36,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:36,206 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-15 20:21:36,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:36,206 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:21:36,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:36,207 INFO L225 Difference]: With dead ends: 94 [2020-10-15 20:21:36,207 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 20:21:36,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:21:36,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 20:21:36,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-15 20:21:36,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:21:36,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:21:36,211 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 20:21:36,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:36,212 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:21:36,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:36,212 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:21:36,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:36,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:36,213 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:36,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-15 20:21:36,423 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:36,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:36,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-15 20:21:36,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:36,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361020796] [2020-10-15 20:21:36,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:36,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361020796] [2020-10-15 20:21:36,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573579538] [2020-10-15 20:21:36,551 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:36,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:36,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:36,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:36,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:36,611 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:36,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:36,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:36,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:21:36,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480475803] [2020-10-15 20:21:36,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:36,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:36,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:36,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:36,624 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 20:21:36,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:36,898 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-15 20:21:36,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:21:36,899 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:21:36,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:36,900 INFO L225 Difference]: With dead ends: 91 [2020-10-15 20:21:36,900 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 20:21:36,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:21:36,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 20:21:36,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-15 20:21:36,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:21:36,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:21:36,902 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 20:21:36,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:36,902 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:21:36,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:36,902 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:21:36,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:36,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:36,902 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:37,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-15 20:21:37,103 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:37,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:37,104 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-15 20:21:37,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:37,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293906181] [2020-10-15 20:21:37,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:37,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293906181] [2020-10-15 20:21:37,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898447562] [2020-10-15 20:21:37,219 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:37,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 20:21:37,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:37,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:37,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:37,281 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:37,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:37,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:21:37,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483723187] [2020-10-15 20:21:37,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:37,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:37,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:37,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:37,283 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 20:21:37,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:37,552 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-15 20:21:37,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:21:37,552 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:21:37,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:37,553 INFO L225 Difference]: With dead ends: 88 [2020-10-15 20:21:37,553 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 20:21:37,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:21:37,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 20:21:37,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-15 20:21:37,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:21:37,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:21:37,556 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 20:21:37,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:37,556 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:21:37,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:37,557 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:21:37,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:37,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:37,558 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:37,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:37,759 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:37,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:37,759 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-15 20:21:37,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:37,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578949735] [2020-10-15 20:21:37,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:37,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578949735] [2020-10-15 20:21:37,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321077273] [2020-10-15 20:21:37,881 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:37,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 20:21:37,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:37,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:37,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:37,944 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:37,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:37,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:21:37,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998129808] [2020-10-15 20:21:37,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:37,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:37,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:37,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:37,955 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 20:21:38,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:38,313 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-15 20:21:38,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:21:38,314 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:21:38,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:38,315 INFO L225 Difference]: With dead ends: 87 [2020-10-15 20:21:38,315 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 20:21:38,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:21:38,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 20:21:38,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-15 20:21:38,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:21:38,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:21:38,318 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 20:21:38,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:38,319 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:21:38,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:38,319 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:21:38,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:38,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:38,319 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:38,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:38,529 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:38,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:38,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-15 20:21:38,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:38,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331435465] [2020-10-15 20:21:38,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:38,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331435465] [2020-10-15 20:21:38,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999625193] [2020-10-15 20:21:38,630 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:38,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:38,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:38,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:38,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:21:38,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119703857] [2020-10-15 20:21:38,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:38,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:38,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:38,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:38,697 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 20:21:39,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:39,006 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-15 20:21:39,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:39,006 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:21:39,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:39,007 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:21:39,007 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 20:21:39,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:21:39,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 20:21:39,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-15 20:21:39,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:21:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:21:39,010 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 20:21:39,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:39,010 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:21:39,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:39,010 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:21:39,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:39,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:39,011 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:39,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-15 20:21:39,211 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:39,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:39,212 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-15 20:21:39,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:39,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341719999] [2020-10-15 20:21:39,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:39,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341719999] [2020-10-15 20:21:39,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651908137] [2020-10-15 20:21:39,315 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:39,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:39,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:39,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:39,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:39,374 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:39,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:39,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:21:39,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607065524] [2020-10-15 20:21:39,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:39,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:39,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:39,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:39,386 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 20:21:39,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:39,804 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-15 20:21:39,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:21:39,805 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:21:39,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:39,806 INFO L225 Difference]: With dead ends: 83 [2020-10-15 20:21:39,806 INFO L226 Difference]: Without dead ends: 77 [2020-10-15 20:21:39,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:21:39,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-15 20:21:39,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-15 20:21:39,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:21:39,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:21:39,809 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 20:21:39,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:39,810 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:21:39,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:39,811 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:21:39,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:39,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:39,812 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:40,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:40,021 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:40,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:40,021 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-15 20:21:40,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:40,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187664795] [2020-10-15 20:21:40,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:40,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187664795] [2020-10-15 20:21:40,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747078662] [2020-10-15 20:21:40,128 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:40,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 20:21:40,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:40,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:40,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:40,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:40,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:21:40,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651540728] [2020-10-15 20:21:40,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:40,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:40,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:40,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:40,192 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 20:21:40,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:40,544 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-15 20:21:40,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:21:40,544 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:21:40,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:40,545 INFO L225 Difference]: With dead ends: 80 [2020-10-15 20:21:40,545 INFO L226 Difference]: Without dead ends: 74 [2020-10-15 20:21:40,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:21:40,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-15 20:21:40,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-15 20:21:40,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:21:40,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:21:40,548 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-15 20:21:40,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:40,548 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:21:40,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:40,548 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:21:40,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:40,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:40,549 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:40,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-15 20:21:40,750 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:40,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:40,750 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-15 20:21:40,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:40,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686604332] [2020-10-15 20:21:40,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:40,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686604332] [2020-10-15 20:21:40,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797281014] [2020-10-15 20:21:40,848 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:40,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:40,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:40,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:40,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:40,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:40,922 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:40,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:40,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:21:40,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965187157] [2020-10-15 20:21:40,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:40,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:40,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:40,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:40,924 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-15 20:21:41,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:41,468 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-15 20:21:41,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:21:41,468 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:21:41,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:41,469 INFO L225 Difference]: With dead ends: 79 [2020-10-15 20:21:41,469 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 20:21:41,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:21:41,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 20:21:41,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-15 20:21:41,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:21:41,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:21:41,472 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-15 20:21:41,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:41,472 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:21:41,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:41,472 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:21:41,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:41,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:41,473 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:41,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:41,680 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:41,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:41,680 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-15 20:21:41,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:41,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908884387] [2020-10-15 20:21:41,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:41,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908884387] [2020-10-15 20:21:41,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748742088] [2020-10-15 20:21:41,775 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:41,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 20:21:41,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:41,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:41,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:41,852 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:41,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:41,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-15 20:21:41,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865559322] [2020-10-15 20:21:41,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 20:21:41,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:41,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 20:21:41,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-15 20:21:41,853 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-15 20:21:42,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:42,245 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-15 20:21:42,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:21:42,245 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-15 20:21:42,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:42,246 INFO L225 Difference]: With dead ends: 95 [2020-10-15 20:21:42,246 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 20:21:42,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:21:42,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 20:21:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-15 20:21:42,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 20:21:42,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-15 20:21:42,249 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-15 20:21:42,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:42,250 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-15 20:21:42,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 20:21:42,250 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-15 20:21:42,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:42,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:42,250 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:42,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-15 20:21:42,451 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:42,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:42,452 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-15 20:21:42,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:42,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138462383] [2020-10-15 20:21:42,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:42,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138462383] [2020-10-15 20:21:42,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397090800] [2020-10-15 20:21:42,546 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:42,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-15 20:21:42,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:42,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:42,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:42,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:42,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:42,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:21:42,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774970910] [2020-10-15 20:21:42,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:42,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:42,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:42,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:42,617 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-15 20:21:43,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:43,132 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-10-15 20:21:43,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:21:43,133 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:21:43,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:43,134 INFO L225 Difference]: With dead ends: 76 [2020-10-15 20:21:43,134 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 20:21:43,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:21:43,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 20:21:43,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-10-15 20:21:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 20:21:43,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-15 20:21:43,136 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-15 20:21:43,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:43,137 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-15 20:21:43,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:43,137 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-15 20:21:43,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 20:21:43,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:43,137 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:43,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:43,338 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:43,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:43,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-15 20:21:43,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:43,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394770245] [2020-10-15 20:21:43,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:43,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394770245] [2020-10-15 20:21:43,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621458764] [2020-10-15 20:21:43,432 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:43,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 20:21:43,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:43,507 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:43,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:43,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-15 20:21:43,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136235320] [2020-10-15 20:21:43,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:43,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:43,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:43,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:43,521 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-15 20:21:43,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:43,986 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-15 20:21:43,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:21:43,987 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-15 20:21:43,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:43,987 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:21:43,988 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 20:21:43,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:21:43,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 20:21:43,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-15 20:21:43,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 20:21:43,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-15 20:21:43,990 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-15 20:21:43,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:43,991 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-15 20:21:43,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:43,991 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-15 20:21:43,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:43,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:43,991 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:44,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-15 20:21:44,193 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:44,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:44,193 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-15 20:21:44,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:44,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358046749] [2020-10-15 20:21:44,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:44,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358046749] [2020-10-15 20:21:44,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50532171] [2020-10-15 20:21:44,299 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:44,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:44,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:44,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:44,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:44,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:21:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:44,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:44,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:21:44,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395546177] [2020-10-15 20:21:44,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:21:44,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:44,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:21:44,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:44,379 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-10-15 20:21:44,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:44,900 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-10-15 20:21:44,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:21:44,900 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:21:44,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:44,901 INFO L225 Difference]: With dead ends: 72 [2020-10-15 20:21:44,901 INFO L226 Difference]: Without dead ends: 67 [2020-10-15 20:21:44,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:21:44,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-15 20:21:44,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-15 20:21:44,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 20:21:44,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-15 20:21:44,904 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-10-15 20:21:44,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:44,904 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-15 20:21:44,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:21:44,904 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-15 20:21:44,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:44,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:44,905 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:45,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-15 20:21:45,106 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:45,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:45,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-15 20:21:45,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:45,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280819866] [2020-10-15 20:21:45,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:45,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280819866] [2020-10-15 20:21:45,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876290544] [2020-10-15 20:21:45,240 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:45,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 20:21:45,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:45,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:45,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:45,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:45,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:21:45,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576093337] [2020-10-15 20:21:45,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:45,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:45,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:45,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:45,296 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-10-15 20:21:45,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:45,520 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-10-15 20:21:45,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:21:45,521 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:21:45,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:45,522 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:21:45,522 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 20:21:45,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:21:45,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 20:21:45,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-15 20:21:45,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:21:45,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-15 20:21:45,524 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-10-15 20:21:45,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:45,525 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-15 20:21:45,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:45,525 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-15 20:21:45,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:45,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:45,525 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:45,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:45,726 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:45,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:45,726 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-10-15 20:21:45,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:45,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73081809] [2020-10-15 20:21:45,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:45,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73081809] [2020-10-15 20:21:45,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927829847] [2020-10-15 20:21:45,876 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:45,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:45,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:45,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:45,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:45,932 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:45,941 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:45,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:45,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:21:45,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617400405] [2020-10-15 20:21:45,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:21:45,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:45,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:21:45,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:45,943 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-10-15 20:21:46,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:46,211 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-10-15 20:21:46,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:21:46,212 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:21:46,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:46,213 INFO L225 Difference]: With dead ends: 90 [2020-10-15 20:21:46,213 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 20:21:46,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:21:46,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 20:21:46,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-15 20:21:46,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 20:21:46,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-10-15 20:21:46,216 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-10-15 20:21:46,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:46,216 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-10-15 20:21:46,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:21:46,217 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-10-15 20:21:46,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:46,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:46,217 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:46,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:46,428 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:46,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:46,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-10-15 20:21:46,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:46,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839676154] [2020-10-15 20:21:46,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:46,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839676154] [2020-10-15 20:21:46,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907908750] [2020-10-15 20:21:46,568 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:46,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 20:21:46,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:46,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:46,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:46,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:46,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:21:46,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517969315] [2020-10-15 20:21:46,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:46,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:46,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:46,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:46,626 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-10-15 20:21:46,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:46,926 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-10-15 20:21:46,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:46,926 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:21:46,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:46,927 INFO L225 Difference]: With dead ends: 91 [2020-10-15 20:21:46,927 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 20:21:46,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:21:46,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 20:21:46,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-10-15 20:21:46,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 20:21:46,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-15 20:21:46,930 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-10-15 20:21:46,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:46,930 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-15 20:21:46,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:46,930 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-15 20:21:46,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:46,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:46,931 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:47,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:47,137 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:47,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:47,137 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-10-15 20:21:47,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:47,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445836088] [2020-10-15 20:21:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:47,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445836088] [2020-10-15 20:21:47,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721039181] [2020-10-15 20:21:47,270 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:47,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 20:21:47,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:47,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:47,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:47,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:47,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:47,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:21:47,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918199026] [2020-10-15 20:21:47,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:21:47,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:47,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:21:47,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:47,354 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-10-15 20:21:47,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:47,691 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-10-15 20:21:47,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:21:47,692 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:21:47,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:47,693 INFO L225 Difference]: With dead ends: 99 [2020-10-15 20:21:47,693 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 20:21:47,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:21:47,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 20:21:47,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-15 20:21:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:21:47,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-15 20:21:47,696 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-10-15 20:21:47,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:47,697 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-15 20:21:47,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:21:47,697 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-15 20:21:47,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:47,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:47,697 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:47,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:47,898 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:47,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:47,899 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-10-15 20:21:47,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:47,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8532204] [2020-10-15 20:21:47,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:48,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8532204] [2020-10-15 20:21:48,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046292308] [2020-10-15 20:21:48,020 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:48,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:48,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:48,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:48,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:21:48,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224472351] [2020-10-15 20:21:48,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:48,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:48,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:48,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:48,078 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-10-15 20:21:48,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:48,424 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-15 20:21:48,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:21:48,425 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:21:48,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:48,426 INFO L225 Difference]: With dead ends: 99 [2020-10-15 20:21:48,426 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 20:21:48,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:21:48,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 20:21:48,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-15 20:21:48,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 20:21:48,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-10-15 20:21:48,429 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-10-15 20:21:48,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:48,429 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-10-15 20:21:48,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:48,429 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-10-15 20:21:48,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:48,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:48,430 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:48,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-15 20:21:48,636 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:48,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:48,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-10-15 20:21:48,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:48,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053942028] [2020-10-15 20:21:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:48,761 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:48,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053942028] [2020-10-15 20:21:48,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607394275] [2020-10-15 20:21:48,762 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:48,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:48,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:48,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:48,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:48,822 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:48,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:48,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:21:48,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133196081] [2020-10-15 20:21:48,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:21:48,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:48,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:21:48,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:48,842 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-10-15 20:21:49,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:49,256 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-10-15 20:21:49,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:21:49,256 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:21:49,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:49,257 INFO L225 Difference]: With dead ends: 96 [2020-10-15 20:21:49,258 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 20:21:49,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:21:49,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 20:21:49,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-15 20:21:49,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 20:21:49,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-15 20:21:49,261 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-10-15 20:21:49,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:49,261 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-15 20:21:49,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:21:49,261 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-15 20:21:49,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:49,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:49,262 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:49,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:49,463 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:49,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:49,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-10-15 20:21:49,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:49,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595475591] [2020-10-15 20:21:49,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:49,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595475591] [2020-10-15 20:21:49,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626463950] [2020-10-15 20:21:49,591 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:49,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 20:21:49,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:49,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:49,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:49,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:49,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:21:49,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033534800] [2020-10-15 20:21:49,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:49,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:49,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:49,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:49,654 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-10-15 20:21:50,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:50,039 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-10-15 20:21:50,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:21:50,039 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:21:50,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:50,040 INFO L225 Difference]: With dead ends: 97 [2020-10-15 20:21:50,041 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 20:21:50,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:21:50,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 20:21:50,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-15 20:21:50,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:21:50,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-15 20:21:50,044 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-10-15 20:21:50,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:50,044 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-15 20:21:50,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:50,044 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-15 20:21:50,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:50,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:50,045 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:50,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-15 20:21:50,246 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:50,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:50,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-10-15 20:21:50,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:50,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425486237] [2020-10-15 20:21:50,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:50,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425486237] [2020-10-15 20:21:50,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180820013] [2020-10-15 20:21:50,362 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:50,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:50,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:50,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:50,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:50,473 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:50,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:50,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:21:50,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797545623] [2020-10-15 20:21:50,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:21:50,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:50,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:21:50,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:50,487 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-10-15 20:21:51,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:51,134 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-15 20:21:51,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:21:51,135 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:21:51,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:51,136 INFO L225 Difference]: With dead ends: 94 [2020-10-15 20:21:51,136 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 20:21:51,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 20:21:51,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 20:21:51,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-10-15 20:21:51,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:21:51,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-15 20:21:51,140 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-10-15 20:21:51,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:51,140 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-15 20:21:51,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:21:51,141 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-15 20:21:51,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:51,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:51,142 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:51,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:51,351 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:51,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:51,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-10-15 20:21:51,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:51,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706004734] [2020-10-15 20:21:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:51,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706004734] [2020-10-15 20:21:51,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15351835] [2020-10-15 20:21:51,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:51,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 20:21:51,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:51,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:51,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:51,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:51,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:21:51,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540483598] [2020-10-15 20:21:51,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:51,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:51,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:51,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:51,517 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-10-15 20:21:51,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:51,942 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-10-15 20:21:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:21:51,943 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:21:51,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:51,944 INFO L225 Difference]: With dead ends: 95 [2020-10-15 20:21:51,944 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 20:21:51,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:21:51,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 20:21:51,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-15 20:21:51,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 20:21:51,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-15 20:21:51,948 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-10-15 20:21:51,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:51,949 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-15 20:21:51,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:51,949 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-15 20:21:51,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:51,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:51,949 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:52,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-15 20:21:52,154 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:52,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:52,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-10-15 20:21:52,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:52,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994967272] [2020-10-15 20:21:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:52,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994967272] [2020-10-15 20:21:52,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320615782] [2020-10-15 20:21:52,276 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:52,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 20:21:52,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:52,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:52,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:52,346 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:52,357 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:52,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:52,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:21:52,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279043964] [2020-10-15 20:21:52,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:21:52,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:52,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:21:52,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:52,358 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-15 20:21:52,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:52,928 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-15 20:21:52,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:21:52,929 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:21:52,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:52,930 INFO L225 Difference]: With dead ends: 92 [2020-10-15 20:21:52,930 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 20:21:52,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:21:52,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 20:21:52,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-15 20:21:52,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 20:21:52,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-15 20:21:52,933 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-10-15 20:21:52,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:52,933 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-15 20:21:52,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:21:52,934 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-15 20:21:52,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:52,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:52,934 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:53,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:53,142 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:53,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:53,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-10-15 20:21:53,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:53,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685084901] [2020-10-15 20:21:53,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:53,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685084901] [2020-10-15 20:21:53,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357460130] [2020-10-15 20:21:53,249 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:53,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:53,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:53,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:53,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-15 20:21:53,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532612725] [2020-10-15 20:21:53,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 20:21:53,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:53,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 20:21:53,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:21:53,306 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-10-15 20:21:53,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:53,785 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-10-15 20:21:53,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:21:53,785 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-15 20:21:53,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:53,787 INFO L225 Difference]: With dead ends: 112 [2020-10-15 20:21:53,787 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 20:21:53,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:21:53,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 20:21:53,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-10-15 20:21:53,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:21:53,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-10-15 20:21:53,790 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-10-15 20:21:53,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:53,790 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-10-15 20:21:53,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 20:21:53,790 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-10-15 20:21:53,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 20:21:53,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:53,790 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:53,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:53,993 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:53,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:53,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-10-15 20:21:53,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:53,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226826443] [2020-10-15 20:21:53,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:54,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226826443] [2020-10-15 20:21:54,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819329854] [2020-10-15 20:21:54,093 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:54,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:54,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:54,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 20:21:54,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:54,195 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:54,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:54,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 20:21:54,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044456720] [2020-10-15 20:21:54,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:21:54,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:54,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:21:54,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:54,212 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-10-15 20:21:54,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:54,820 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-10-15 20:21:54,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:21:54,820 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-15 20:21:54,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:54,821 INFO L225 Difference]: With dead ends: 93 [2020-10-15 20:21:54,821 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 20:21:54,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 20:21:54,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 20:21:54,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-15 20:21:54,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 20:21:54,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-15 20:21:54,824 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-15 20:21:54,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:54,824 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-15 20:21:54,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:21:54,824 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-15 20:21:54,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:21:54,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:54,825 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:55,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:55,025 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:55,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:55,026 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-10-15 20:21:55,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:55,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938066257] [2020-10-15 20:21:55,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:55,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938066257] [2020-10-15 20:21:55,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182489188] [2020-10-15 20:21:55,178 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:55,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 20:21:55,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:55,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:21:55,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:55,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:55,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:21:55,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841806228] [2020-10-15 20:21:55,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:21:55,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:55,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:21:55,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:55,236 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-15 20:21:55,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:55,513 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-10-15 20:21:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:21:55,514 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:21:55,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:55,515 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:21:55,515 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 20:21:55,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:21:55,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 20:21:55,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-15 20:21:55,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:21:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:21:55,517 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 20:21:55,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:55,517 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:21:55,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:21:55,517 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:21:55,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:21:55,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:55,518 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:55,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:55,727 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:55,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:55,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-10-15 20:21:55,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:55,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755386788] [2020-10-15 20:21:55,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:55,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755386788] [2020-10-15 20:21:55,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087673354] [2020-10-15 20:21:55,885 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:55,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:21:55,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:55,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:21:55,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:55,950 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:55,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:55,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:21:55,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485995950] [2020-10-15 20:21:55,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:21:55,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:55,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:21:55,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:21:55,964 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 20:21:56,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:56,317 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-10-15 20:21:56,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:21:56,318 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:21:56,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:56,319 INFO L225 Difference]: With dead ends: 101 [2020-10-15 20:21:56,319 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 20:21:56,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:21:56,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 20:21:56,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-10-15 20:21:56,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:21:56,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:21:56,322 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 20:21:56,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:56,322 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:21:56,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:21:56,322 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:21:56,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:21:56,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:56,323 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:56,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:56,523 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:56,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:56,524 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-10-15 20:21:56,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:56,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416394171] [2020-10-15 20:21:56,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:56,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416394171] [2020-10-15 20:21:56,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512037293] [2020-10-15 20:21:56,670 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:56,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 20:21:56,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:56,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:21:56,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:56,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:56,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:21:56,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830950695] [2020-10-15 20:21:56,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:21:56,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:56,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:21:56,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:56,730 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 20:21:57,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:57,080 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-10-15 20:21:57,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:21:57,081 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:21:57,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:57,082 INFO L225 Difference]: With dead ends: 98 [2020-10-15 20:21:57,082 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 20:21:57,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:21:57,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 20:21:57,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-15 20:21:57,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:21:57,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:21:57,085 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 20:21:57,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:57,086 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:21:57,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:21:57,086 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:21:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:21:57,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:57,086 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:57,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:57,289 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:57,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:57,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-10-15 20:21:57,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:57,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972652596] [2020-10-15 20:21:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:57,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:57,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972652596] [2020-10-15 20:21:57,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858436120] [2020-10-15 20:21:57,421 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:57,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 20:21:57,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:57,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:21:57,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:57,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:57,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:57,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:21:57,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197207365] [2020-10-15 20:21:57,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:21:57,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:57,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:21:57,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:21:57,508 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 20:21:57,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:57,930 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-15 20:21:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:21:57,931 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:21:57,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:57,932 INFO L225 Difference]: With dead ends: 97 [2020-10-15 20:21:57,932 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 20:21:57,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:21:57,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 20:21:57,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-15 20:21:57,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:21:57,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:21:57,935 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 20:21:57,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:57,936 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:21:57,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:21:57,936 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:21:57,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:21:57,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:57,936 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:58,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:58,141 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:58,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:58,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-10-15 20:21:58,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:58,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103633355] [2020-10-15 20:21:58,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:58,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103633355] [2020-10-15 20:21:58,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970628363] [2020-10-15 20:21:58,271 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:58,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:21:58,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:58,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:58,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:21:58,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007236352] [2020-10-15 20:21:58,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:21:58,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:58,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:21:58,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:21:58,332 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 20:21:58,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:58,704 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-15 20:21:58,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:21:58,705 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:21:58,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:58,706 INFO L225 Difference]: With dead ends: 94 [2020-10-15 20:21:58,706 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 20:21:58,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:21:58,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 20:21:58,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-15 20:21:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:21:58,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:21:58,709 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 20:21:58,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:58,709 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:21:58,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:21:58,709 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:21:58,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:21:58,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:58,710 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:58,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-15 20:21:58,911 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:58,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:58,911 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-10-15 20:21:58,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:58,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432620717] [2020-10-15 20:21:58,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:59,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432620717] [2020-10-15 20:21:59,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000048422] [2020-10-15 20:21:59,055 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:59,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:21:59,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:59,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:21:59,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:21:59,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:21:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:59,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:21:59,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:21:59,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216507146] [2020-10-15 20:21:59,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:21:59,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:21:59,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:21:59,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:21:59,135 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 20:21:59,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:21:59,630 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-15 20:21:59,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:21:59,631 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:21:59,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:21:59,632 INFO L225 Difference]: With dead ends: 93 [2020-10-15 20:21:59,632 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 20:21:59,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:21:59,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 20:21:59,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-15 20:21:59,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:21:59,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:21:59,634 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 20:21:59,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:21:59,634 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:21:59,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:21:59,635 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:21:59,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:21:59,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:21:59,635 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:21:59,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:59,836 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:21:59,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:21:59,836 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-10-15 20:21:59,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:21:59,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097662181] [2020-10-15 20:21:59,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:21:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:21:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:21:59,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097662181] [2020-10-15 20:21:59,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592945371] [2020-10-15 20:21:59,948 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:21:59,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 20:21:59,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:21:59,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:21:59,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:00,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:00,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:22:00,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307768592] [2020-10-15 20:22:00,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:00,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:00,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:00,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:00,011 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 20:22:00,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:00,425 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-10-15 20:22:00,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:00,426 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:22:00,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:00,427 INFO L225 Difference]: With dead ends: 90 [2020-10-15 20:22:00,427 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 20:22:00,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 20:22:00,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 20:22:00,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-15 20:22:00,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:22:00,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:22:00,430 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 20:22:00,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:00,430 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:22:00,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:00,430 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:22:00,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:00,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:00,431 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:00,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-15 20:22:00,632 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:00,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:00,632 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-10-15 20:22:00,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:00,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026781620] [2020-10-15 20:22:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:00,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:00,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026781620] [2020-10-15 20:22:00,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179533281] [2020-10-15 20:22:00,765 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:00,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:00,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:00,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:00,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:00,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:00,839 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:00,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:00,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:00,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397681018] [2020-10-15 20:22:00,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:00,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:00,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:00,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:00,841 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 20:22:01,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:01,404 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-15 20:22:01,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:22:01,405 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:01,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:01,406 INFO L225 Difference]: With dead ends: 89 [2020-10-15 20:22:01,406 INFO L226 Difference]: Without dead ends: 83 [2020-10-15 20:22:01,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:22:01,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-15 20:22:01,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-15 20:22:01,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:22:01,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:22:01,410 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 20:22:01,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:01,411 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:22:01,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:01,411 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:22:01,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:01,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:01,411 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:01,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:01,612 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:01,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:01,613 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-10-15 20:22:01,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:01,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239774993] [2020-10-15 20:22:01,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:01,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239774993] [2020-10-15 20:22:01,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388567886] [2020-10-15 20:22:01,725 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:01,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 20:22:01,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:01,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:01,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:01,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:01,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:22:01,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931991366] [2020-10-15 20:22:01,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:01,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:01,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:01,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:01,798 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 20:22:02,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:02,246 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-10-15 20:22:02,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:22:02,247 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:22:02,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:02,248 INFO L225 Difference]: With dead ends: 86 [2020-10-15 20:22:02,248 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 20:22:02,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:22:02,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 20:22:02,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-15 20:22:02,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:22:02,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:22:02,253 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-15 20:22:02,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:02,253 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:22:02,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:02,253 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:22:02,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:02,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:02,254 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:02,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:02,463 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:02,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:02,463 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-10-15 20:22:02,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:02,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374715876] [2020-10-15 20:22:02,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:02,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374715876] [2020-10-15 20:22:02,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189895511] [2020-10-15 20:22:02,585 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:02,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 20:22:02,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:02,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:02,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:02,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:02,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:02,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:02,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590477550] [2020-10-15 20:22:02,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:02,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:02,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:02,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:02,663 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-15 20:22:03,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:03,297 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-10-15 20:22:03,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:22:03,298 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:03,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:03,299 INFO L225 Difference]: With dead ends: 85 [2020-10-15 20:22:03,299 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 20:22:03,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:22:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 20:22:03,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-15 20:22:03,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:22:03,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:22:03,302 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-15 20:22:03,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:03,302 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:22:03,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:03,302 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:22:03,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:03,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:03,302 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:03,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:03,503 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:03,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:03,504 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-10-15 20:22:03,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:03,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68430939] [2020-10-15 20:22:03,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:03,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68430939] [2020-10-15 20:22:03,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387176812] [2020-10-15 20:22:03,619 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:03,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:03,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:03,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:03,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:03,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-15 20:22:03,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146107156] [2020-10-15 20:22:03,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 20:22:03,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:03,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 20:22:03,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-15 20:22:03,679 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-15 20:22:04,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:04,198 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-15 20:22:04,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:22:04,199 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-15 20:22:04,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:04,200 INFO L225 Difference]: With dead ends: 101 [2020-10-15 20:22:04,201 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 20:22:04,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 20:22:04,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 20:22:04,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-15 20:22:04,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 20:22:04,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-10-15 20:22:04,204 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-10-15 20:22:04,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:04,205 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-10-15 20:22:04,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 20:22:04,205 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-10-15 20:22:04,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:04,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:04,205 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:04,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:04,416 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:04,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:04,416 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-10-15 20:22:04,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:04,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455993617] [2020-10-15 20:22:04,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:04,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455993617] [2020-10-15 20:22:04,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394599760] [2020-10-15 20:22:04,533 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:04,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:04,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:04,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:04,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:04,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:04,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:04,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:04,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413830058] [2020-10-15 20:22:04,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:04,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:04,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:04,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:04,611 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-10-15 20:22:05,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:05,282 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-10-15 20:22:05,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:22:05,282 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:05,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:05,283 INFO L225 Difference]: With dead ends: 82 [2020-10-15 20:22:05,283 INFO L226 Difference]: Without dead ends: 74 [2020-10-15 20:22:05,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:22:05,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-15 20:22:05,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-10-15 20:22:05,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-15 20:22:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-10-15 20:22:05,286 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-10-15 20:22:05,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:05,286 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-10-15 20:22:05,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:05,286 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-10-15 20:22:05,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 20:22:05,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:05,287 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:05,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:05,496 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:05,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:05,496 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-10-15 20:22:05,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:05,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733814892] [2020-10-15 20:22:05,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:05,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733814892] [2020-10-15 20:22:05,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357385507] [2020-10-15 20:22:05,613 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:05,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 20:22:05,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:05,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 20:22:05,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:05,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:22:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:05,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:05,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-15 20:22:05,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88726834] [2020-10-15 20:22:05,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:05,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:05,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:05,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:05,692 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-10-15 20:22:06,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:06,305 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-15 20:22:06,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:22:06,306 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-15 20:22:06,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:06,307 INFO L225 Difference]: With dead ends: 92 [2020-10-15 20:22:06,307 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 20:22:06,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:22:06,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 20:22:06,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-10-15 20:22:06,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:22:06,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-15 20:22:06,309 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-10-15 20:22:06,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:06,310 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-15 20:22:06,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:06,310 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-15 20:22:06,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:06,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:06,311 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:06,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:06,520 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:06,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:06,520 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-10-15 20:22:06,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:06,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827789761] [2020-10-15 20:22:06,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:06,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827789761] [2020-10-15 20:22:06,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550328754] [2020-10-15 20:22:06,648 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:06,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:06,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:06,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:06,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:06,718 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:22:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:06,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:06,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:06,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857923386] [2020-10-15 20:22:06,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:06,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:06,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:06,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:06,733 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-10-15 20:22:07,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:07,397 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-10-15 20:22:07,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:22:07,398 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:07,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:07,398 INFO L225 Difference]: With dead ends: 78 [2020-10-15 20:22:07,399 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 20:22:07,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:22:07,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 20:22:07,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-15 20:22:07,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-15 20:22:07,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-15 20:22:07,401 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-10-15 20:22:07,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:07,401 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-15 20:22:07,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:07,402 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-15 20:22:07,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:07,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:07,402 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:07,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-15 20:22:07,603 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:07,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:07,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-10-15 20:22:07,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:07,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404827721] [2020-10-15 20:22:07,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:07,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404827721] [2020-10-15 20:22:07,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195826244] [2020-10-15 20:22:07,779 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:07,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 20:22:07,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:07,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:07,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:07,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:07,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:07,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152965424] [2020-10-15 20:22:07,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:07,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:07,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:07,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:07,832 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-10-15 20:22:08,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:08,114 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-15 20:22:08,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:22:08,117 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:08,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:08,118 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:22:08,118 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 20:22:08,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:22:08,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 20:22:08,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-15 20:22:08,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:22:08,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-15 20:22:08,120 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-10-15 20:22:08,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:08,120 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-15 20:22:08,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:08,120 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-15 20:22:08,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:08,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:08,120 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:08,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:08,321 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:08,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:08,322 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-10-15 20:22:08,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:08,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160933405] [2020-10-15 20:22:08,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:08,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160933405] [2020-10-15 20:22:08,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273140801] [2020-10-15 20:22:08,499 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:08,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 20:22:08,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:08,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:08,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:08,565 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:08,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:08,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:08,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313550487] [2020-10-15 20:22:08,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:08,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:08,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:08,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:08,580 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-10-15 20:22:08,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:08,878 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-10-15 20:22:08,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:22:08,878 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:08,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:08,879 INFO L225 Difference]: With dead ends: 98 [2020-10-15 20:22:08,879 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 20:22:08,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:22:08,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 20:22:08,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-10-15 20:22:08,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-15 20:22:08,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-10-15 20:22:08,882 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-10-15 20:22:08,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:08,882 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-10-15 20:22:08,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:08,882 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-10-15 20:22:08,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:08,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:08,883 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:09,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-15 20:22:09,084 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:09,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:09,084 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-10-15 20:22:09,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:09,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254519325] [2020-10-15 20:22:09,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:09,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254519325] [2020-10-15 20:22:09,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075351932] [2020-10-15 20:22:09,257 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:09,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:09,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:09,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:09,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:09,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119360734] [2020-10-15 20:22:09,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:09,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:09,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:09,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:09,313 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-10-15 20:22:09,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:09,685 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-15 20:22:09,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:22:09,686 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:09,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:09,686 INFO L225 Difference]: With dead ends: 99 [2020-10-15 20:22:09,687 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 20:22:09,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:22:09,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 20:22:09,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-15 20:22:09,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 20:22:09,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-10-15 20:22:09,690 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-10-15 20:22:09,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:09,690 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-10-15 20:22:09,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:09,691 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-10-15 20:22:09,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:09,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:09,692 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:09,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:09,900 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:09,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:09,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-10-15 20:22:09,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:09,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409460568] [2020-10-15 20:22:09,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:10,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409460568] [2020-10-15 20:22:10,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961942691] [2020-10-15 20:22:10,117 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:10,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:10,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:10,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:10,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:10,216 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:10,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:10,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:10,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765927825] [2020-10-15 20:22:10,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:10,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:10,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:10,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:10,235 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-10-15 20:22:10,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:10,633 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-10-15 20:22:10,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:22:10,633 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:10,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:10,634 INFO L225 Difference]: With dead ends: 109 [2020-10-15 20:22:10,634 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 20:22:10,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 20:22:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 20:22:10,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-15 20:22:10,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:22:10,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-10-15 20:22:10,638 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-10-15 20:22:10,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:10,638 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-10-15 20:22:10,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:10,638 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-10-15 20:22:10,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:10,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:10,639 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:10,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:10,848 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:10,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:10,849 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-10-15 20:22:10,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:10,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238458502] [2020-10-15 20:22:10,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:11,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238458502] [2020-10-15 20:22:11,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766806738] [2020-10-15 20:22:11,002 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:11,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 20:22:11,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:11,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:11,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:11,063 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:11,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:11,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:11,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789294867] [2020-10-15 20:22:11,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:11,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:11,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:11,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:11,065 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-10-15 20:22:11,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:11,477 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-10-15 20:22:11,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:11,478 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:11,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:11,479 INFO L225 Difference]: With dead ends: 109 [2020-10-15 20:22:11,479 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 20:22:11,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:22:11,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 20:22:11,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-15 20:22:11,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 20:22:11,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-15 20:22:11,483 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-10-15 20:22:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:11,483 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-15 20:22:11,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:11,483 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-15 20:22:11,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:11,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:11,484 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:11,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-15 20:22:11,689 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:11,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:11,689 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-10-15 20:22:11,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:11,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065652742] [2020-10-15 20:22:11,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:11,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065652742] [2020-10-15 20:22:11,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097619507] [2020-10-15 20:22:11,860 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:11,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:11,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:11,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:11,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:11,935 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:11,945 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:11,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:11,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:11,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500222974] [2020-10-15 20:22:11,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:11,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:11,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:11,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:11,947 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-10-15 20:22:12,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:12,435 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-10-15 20:22:12,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:22:12,436 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:12,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:12,436 INFO L225 Difference]: With dead ends: 106 [2020-10-15 20:22:12,436 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 20:22:12,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:22:12,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 20:22:12,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-15 20:22:12,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 20:22:12,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-15 20:22:12,438 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-10-15 20:22:12,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:12,439 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-15 20:22:12,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:12,439 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-15 20:22:12,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:12,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:12,440 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:12,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-15 20:22:12,643 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:12,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:12,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-10-15 20:22:12,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:12,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391576918] [2020-10-15 20:22:12,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:12,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391576918] [2020-10-15 20:22:12,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491769416] [2020-10-15 20:22:12,794 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:12,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 20:22:12,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:12,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:12,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:12,850 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:12,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:12,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:12,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029388176] [2020-10-15 20:22:12,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:12,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:12,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:12,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:12,852 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-10-15 20:22:13,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:13,303 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-10-15 20:22:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:22:13,304 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:13,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:13,305 INFO L225 Difference]: With dead ends: 107 [2020-10-15 20:22:13,305 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:22:13,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:22:13,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:22:13,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-15 20:22:13,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 20:22:13,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-10-15 20:22:13,307 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-10-15 20:22:13,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:13,307 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-10-15 20:22:13,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:13,307 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-10-15 20:22:13,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:13,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:13,308 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:13,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:13,514 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:13,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:13,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-10-15 20:22:13,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:13,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005732539] [2020-10-15 20:22:13,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:13,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005732539] [2020-10-15 20:22:13,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164891562] [2020-10-15 20:22:13,666 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:13,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 20:22:13,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:13,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:13,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:13,732 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:13,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:13,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:13,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786190057] [2020-10-15 20:22:13,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:13,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:13,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:13,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:13,744 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-10-15 20:22:14,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:14,300 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-10-15 20:22:14,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:22:14,300 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:14,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:14,301 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:22:14,301 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 20:22:14,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 20:22:14,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 20:22:14,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-10-15 20:22:14,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 20:22:14,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-15 20:22:14,304 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-10-15 20:22:14,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:14,304 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-15 20:22:14,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:14,305 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-15 20:22:14,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:14,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:14,305 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:14,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-15 20:22:14,511 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:14,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:14,511 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-10-15 20:22:14,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:14,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856826604] [2020-10-15 20:22:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:14,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856826604] [2020-10-15 20:22:14,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889372282] [2020-10-15 20:22:14,655 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:14,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:14,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:14,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:14,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:14,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475879301] [2020-10-15 20:22:14,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:14,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:14,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:14,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:14,716 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-10-15 20:22:15,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:15,212 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-10-15 20:22:15,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:22:15,212 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:15,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:15,213 INFO L225 Difference]: With dead ends: 105 [2020-10-15 20:22:15,214 INFO L226 Difference]: Without dead ends: 99 [2020-10-15 20:22:15,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:22:15,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-15 20:22:15,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-15 20:22:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:22:15,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-15 20:22:15,217 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-10-15 20:22:15,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:15,217 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-15 20:22:15,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:15,218 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-15 20:22:15,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:15,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:15,218 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:15,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:15,422 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:15,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:15,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-10-15 20:22:15,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:15,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533286736] [2020-10-15 20:22:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:15,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533286736] [2020-10-15 20:22:15,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080916715] [2020-10-15 20:22:15,564 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:15,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:15,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:15,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:15,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:15,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:15,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:15,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:15,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625877356] [2020-10-15 20:22:15,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:15,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:15,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:15,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:15,641 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-10-15 20:22:16,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:16,267 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-10-15 20:22:16,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:22:16,267 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:16,268 INFO L225 Difference]: With dead ends: 102 [2020-10-15 20:22:16,268 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 20:22:16,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:22:16,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 20:22:16,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-10-15 20:22:16,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:22:16,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-15 20:22:16,271 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-10-15 20:22:16,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:16,271 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-15 20:22:16,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:16,272 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-15 20:22:16,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:16,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:16,272 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:16,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-15 20:22:16,475 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:16,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:16,475 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-10-15 20:22:16,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:16,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773268229] [2020-10-15 20:22:16,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:16,611 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:16,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773268229] [2020-10-15 20:22:16,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753229057] [2020-10-15 20:22:16,612 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:16,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 20:22:16,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:16,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:16,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:16,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:16,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:16,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078038890] [2020-10-15 20:22:16,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:16,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:16,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:16,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:16,675 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-10-15 20:22:17,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:17,217 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-10-15 20:22:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:22:17,218 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:17,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:17,219 INFO L225 Difference]: With dead ends: 103 [2020-10-15 20:22:17,219 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 20:22:17,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:22:17,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 20:22:17,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-15 20:22:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 20:22:17,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-15 20:22:17,222 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-10-15 20:22:17,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:17,222 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-15 20:22:17,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:17,222 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-15 20:22:17,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:17,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:17,223 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:17,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:17,427 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:17,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:17,427 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-10-15 20:22:17,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:17,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386301887] [2020-10-15 20:22:17,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:17,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386301887] [2020-10-15 20:22:17,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630307109] [2020-10-15 20:22:17,564 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:17,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:17,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:17,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:17,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:17,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:17,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:17,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:17,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489906432] [2020-10-15 20:22:17,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:17,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:17,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:17,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:17,639 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-15 20:22:18,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:18,332 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-10-15 20:22:18,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:22:18,333 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:18,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:18,333 INFO L225 Difference]: With dead ends: 100 [2020-10-15 20:22:18,333 INFO L226 Difference]: Without dead ends: 94 [2020-10-15 20:22:18,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:22:18,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-15 20:22:18,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-15 20:22:18,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:22:18,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-15 20:22:18,337 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-10-15 20:22:18,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:18,337 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-15 20:22:18,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:18,337 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-15 20:22:18,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:18,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:18,338 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:18,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-15 20:22:18,538 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:18,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:18,539 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-10-15 20:22:18,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:18,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443186679] [2020-10-15 20:22:18,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:18,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443186679] [2020-10-15 20:22:18,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056717920] [2020-10-15 20:22:18,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:18,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 20:22:18,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:18,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:18,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:18,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:18,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-15 20:22:18,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060416589] [2020-10-15 20:22:18,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:22:18,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:18,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:22:18,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:22:18,733 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-10-15 20:22:19,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:19,474 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-15 20:22:19,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:22:19,475 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-15 20:22:19,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:19,475 INFO L225 Difference]: With dead ends: 120 [2020-10-15 20:22:19,475 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 20:22:19,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:22:19,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 20:22:19,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-15 20:22:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 20:22:19,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-10-15 20:22:19,482 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-10-15 20:22:19,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:19,482 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-10-15 20:22:19,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:22:19,483 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-10-15 20:22:19,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 20:22:19,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:19,483 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:19,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-15 20:22:19,684 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:19,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:19,685 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-10-15 20:22:19,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:19,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418827539] [2020-10-15 20:22:19,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:19,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418827539] [2020-10-15 20:22:19,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244879493] [2020-10-15 20:22:19,814 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:19,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 20:22:19,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:19,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-15 20:22:19,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:19,925 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:19,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:19,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 20:22:19,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927481376] [2020-10-15 20:22:19,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:19,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:19,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:19,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:19,947 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-10-15 20:22:20,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:20,804 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-10-15 20:22:20,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:22:20,805 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-15 20:22:20,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:20,806 INFO L225 Difference]: With dead ends: 101 [2020-10-15 20:22:20,806 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 20:22:20,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:22:20,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 20:22:20,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-15 20:22:20,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 20:22:20,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-15 20:22:20,809 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-15 20:22:20,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:20,809 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-15 20:22:20,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:20,809 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-15 20:22:20,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:20,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:20,809 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:21,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:21,010 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:21,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:21,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-10-15 20:22:21,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:21,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107979723] [2020-10-15 20:22:21,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:21,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107979723] [2020-10-15 20:22:21,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923150356] [2020-10-15 20:22:21,214 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:21,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:21,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:21,268 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:21,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:21,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:22:21,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781711306] [2020-10-15 20:22:21,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:21,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:21,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:21,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:21,269 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-15 20:22:21,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:21,619 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-10-15 20:22:21,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:22:21,619 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:22:21,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:21,620 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:22:21,620 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 20:22:21,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:22:21,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 20:22:21,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-10-15 20:22:21,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:22:21,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:22:21,623 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:22:21,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:21,623 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:22:21,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:22:21,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:21,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:21,624 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:21,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:21,828 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:21,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:21,829 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-10-15 20:22:21,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:21,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523648555] [2020-10-15 20:22:21,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:22,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523648555] [2020-10-15 20:22:22,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712890091] [2020-10-15 20:22:22,040 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:22,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:22,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:22,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:22,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:22,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:22,121 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:22,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:22,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:22:22,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638429207] [2020-10-15 20:22:22,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:22,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:22,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:22,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:22,123 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:22:22,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:22,554 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-10-15 20:22:22,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:22:22,555 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:22:22,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:22,556 INFO L225 Difference]: With dead ends: 111 [2020-10-15 20:22:22,556 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 20:22:22,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:22:22,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 20:22:22,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-15 20:22:22,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:22:22,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:22:22,559 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:22:22,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:22,559 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:22:22,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:22,559 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:22:22,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:22,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:22,560 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:22,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-15 20:22:22,764 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:22,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:22,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-10-15 20:22:22,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:22,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384111601] [2020-10-15 20:22:22,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:22,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384111601] [2020-10-15 20:22:22,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350871480] [2020-10-15 20:22:22,948 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:22,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 20:22:22,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:22,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:22,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:23,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:23,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:22:23,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290510075] [2020-10-15 20:22:23,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:23,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:23,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:23,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:23,013 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:22:23,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:23,406 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-15 20:22:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:22:23,407 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:22:23,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:23,407 INFO L225 Difference]: With dead ends: 108 [2020-10-15 20:22:23,408 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 20:22:23,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 20:22:23,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 20:22:23,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-15 20:22:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:22:23,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:22:23,410 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:22:23,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:23,410 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:22:23,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:23,410 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:22:23,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:23,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:23,411 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:23,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:23,616 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:23,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:23,616 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-10-15 20:22:23,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:23,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482957088] [2020-10-15 20:22:23,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:23,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482957088] [2020-10-15 20:22:23,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783152823] [2020-10-15 20:22:23,804 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:23,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:23,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:23,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:23,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:23,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:23,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:23,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:22:23,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37873498] [2020-10-15 20:22:23,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:23,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:23,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:23,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:23,879 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:22:24,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:24,393 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-10-15 20:22:24,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:22:24,394 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:22:24,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:24,394 INFO L225 Difference]: With dead ends: 107 [2020-10-15 20:22:24,394 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:22:24,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:22:24,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:22:24,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-15 20:22:24,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:22:24,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:22:24,397 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:22:24,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:24,397 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:22:24,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:24,397 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:22:24,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:24,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:24,398 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:24,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-15 20:22:24,607 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:24,607 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-10-15 20:22:24,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:24,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239413412] [2020-10-15 20:22:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:24,776 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:24,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239413412] [2020-10-15 20:22:24,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759784886] [2020-10-15 20:22:24,777 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:24,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 20:22:24,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:24,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:24,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:24,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:24,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:22:24,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691614613] [2020-10-15 20:22:24,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:24,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:24,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:24,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:24,846 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:22:25,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:25,295 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-15 20:22:25,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:25,296 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:22:25,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:25,296 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:22:25,296 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 20:22:25,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:22:25,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 20:22:25,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-15 20:22:25,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:22:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:22:25,300 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:22:25,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:25,300 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:22:25,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:25,300 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:22:25,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:25,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:25,301 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:25,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-15 20:22:25,510 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:25,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:25,510 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-10-15 20:22:25,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:25,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442911145] [2020-10-15 20:22:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:25,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442911145] [2020-10-15 20:22:25,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819820901] [2020-10-15 20:22:25,685 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:25,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 20:22:25,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:25,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:25,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:25,754 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:25,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:25,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:22:25,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901793894] [2020-10-15 20:22:25,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:25,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:25,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:25,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:25,768 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:22:26,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:26,346 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-15 20:22:26,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:22:26,346 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:22:26,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:26,347 INFO L225 Difference]: With dead ends: 103 [2020-10-15 20:22:26,347 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 20:22:26,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:22:26,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 20:22:26,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-15 20:22:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:22:26,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:22:26,350 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:22:26,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:26,351 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:22:26,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:26,351 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:22:26,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:26,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:26,351 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:26,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-15 20:22:26,558 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:26,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:26,558 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-10-15 20:22:26,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:26,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89473121] [2020-10-15 20:22:26,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:26,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89473121] [2020-10-15 20:22:26,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725402734] [2020-10-15 20:22:26,724 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:26,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:26,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:26,781 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:26,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:26,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:22:26,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870165825] [2020-10-15 20:22:26,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:26,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:26,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:26,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:26,783 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:22:27,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:27,287 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-15 20:22:27,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:22:27,287 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:22:27,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:27,288 INFO L225 Difference]: With dead ends: 100 [2020-10-15 20:22:27,288 INFO L226 Difference]: Without dead ends: 94 [2020-10-15 20:22:27,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 20:22:27,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-15 20:22:27,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-10-15 20:22:27,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:22:27,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:22:27,291 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:22:27,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:27,292 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:22:27,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:27,292 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:22:27,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:27,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:27,292 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:27,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:27,501 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:27,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:27,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-10-15 20:22:27,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:27,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725858425] [2020-10-15 20:22:27,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:27,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725858425] [2020-10-15 20:22:27,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13971803] [2020-10-15 20:22:27,674 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:27,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:27,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:27,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:27,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:27,740 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:27,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:27,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:22:27,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291819010] [2020-10-15 20:22:27,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:27,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:27,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:27,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:27,754 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:22:28,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:28,405 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-15 20:22:28,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:22:28,405 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:22:28,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:28,406 INFO L225 Difference]: With dead ends: 99 [2020-10-15 20:22:28,406 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 20:22:28,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:22:28,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 20:22:28,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-15 20:22:28,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:22:28,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:22:28,409 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:22:28,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:28,409 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:22:28,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:28,409 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:22:28,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:28,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:28,410 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:28,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-15 20:22:28,617 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:28,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:28,617 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-10-15 20:22:28,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:28,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639328893] [2020-10-15 20:22:28,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:28,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639328893] [2020-10-15 20:22:28,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935879948] [2020-10-15 20:22:28,774 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:28,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 20:22:28,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:28,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:28,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:28,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:28,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:22:28,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121814984] [2020-10-15 20:22:28,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:28,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:28,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:28,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:28,839 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:22:29,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:29,391 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-15 20:22:29,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:22:29,392 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:22:29,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:29,392 INFO L225 Difference]: With dead ends: 96 [2020-10-15 20:22:29,392 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 20:22:29,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:22:29,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 20:22:29,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-10-15 20:22:29,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:22:29,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:22:29,395 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:22:29,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:29,395 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:22:29,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:29,395 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:22:29,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:29,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:29,396 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:29,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:29,602 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:29,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:29,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-10-15 20:22:29,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:29,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151643264] [2020-10-15 20:22:29,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:29,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151643264] [2020-10-15 20:22:29,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123216411] [2020-10-15 20:22:29,751 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:29,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:29,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:29,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:29,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:29,819 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:29,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:29,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:22:29,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496650136] [2020-10-15 20:22:29,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:29,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:29,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:29,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:29,835 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:22:30,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:30,583 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-15 20:22:30,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:22:30,584 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:22:30,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:30,584 INFO L225 Difference]: With dead ends: 95 [2020-10-15 20:22:30,584 INFO L226 Difference]: Without dead ends: 89 [2020-10-15 20:22:30,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:22:30,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-15 20:22:30,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-15 20:22:30,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:22:30,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:22:30,587 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:22:30,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:30,587 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:22:30,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:30,587 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:22:30,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:30,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:30,588 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:30,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:30,789 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:30,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:30,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-10-15 20:22:30,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:30,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076167100] [2020-10-15 20:22:30,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:30,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076167100] [2020-10-15 20:22:30,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294029813] [2020-10-15 20:22:30,943 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:30,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 20:22:30,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:30,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:30,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:31,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:31,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:22:31,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416952374] [2020-10-15 20:22:31,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:31,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:31,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:31,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:31,016 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:22:31,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:31,623 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-15 20:22:31,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:22:31,624 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:22:31,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:31,624 INFO L225 Difference]: With dead ends: 92 [2020-10-15 20:22:31,624 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 20:22:31,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:22:31,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 20:22:31,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-10-15 20:22:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:22:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:22:31,627 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-15 20:22:31,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:31,628 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:22:31,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:31,628 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:22:31,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:31,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:31,628 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:31,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:31,838 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:31,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:31,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-10-15 20:22:31,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:31,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135797223] [2020-10-15 20:22:31,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:31,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135797223] [2020-10-15 20:22:31,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461531468] [2020-10-15 20:22:31,992 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:32,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 20:22:32,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:32,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:32,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:32,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:32,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:32,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:22:32,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500302462] [2020-10-15 20:22:32,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:32,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:32,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:32,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:32,132 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-15 20:22:32,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:32,938 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-10-15 20:22:32,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:22:32,939 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:22:32,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:32,939 INFO L225 Difference]: With dead ends: 91 [2020-10-15 20:22:32,939 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 20:22:32,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 20:22:32,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 20:22:32,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-15 20:22:32,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:22:32,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:22:32,942 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-15 20:22:32,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:32,943 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:22:32,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:32,943 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:22:32,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:32,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:32,943 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:33,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:33,153 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:33,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:33,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-10-15 20:22:33,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:33,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950060338] [2020-10-15 20:22:33,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:33,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950060338] [2020-10-15 20:22:33,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202916473] [2020-10-15 20:22:33,304 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:33,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:33,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:33,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:33,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:33,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-15 20:22:33,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162131692] [2020-10-15 20:22:33,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:22:33,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:33,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:22:33,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:22:33,364 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-15 20:22:34,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:34,056 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-15 20:22:34,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:22:34,057 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-15 20:22:34,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:34,058 INFO L225 Difference]: With dead ends: 107 [2020-10-15 20:22:34,058 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:22:34,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:22:34,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:22:34,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-15 20:22:34,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 20:22:34,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-10-15 20:22:34,061 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-10-15 20:22:34,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:34,061 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-10-15 20:22:34,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:22:34,062 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-10-15 20:22:34,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:34,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:34,062 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:34,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-15 20:22:34,268 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:34,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:34,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-10-15 20:22:34,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:34,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269470573] [2020-10-15 20:22:34,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:34,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269470573] [2020-10-15 20:22:34,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122428478] [2020-10-15 20:22:34,429 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:34,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:34,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:34,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:34,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:34,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:34,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:34,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:22:34,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876006926] [2020-10-15 20:22:34,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:34,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:34,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:34,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:34,551 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-10-15 20:22:35,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:35,452 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-10-15 20:22:35,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:22:35,452 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:22:35,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:35,453 INFO L225 Difference]: With dead ends: 88 [2020-10-15 20:22:35,453 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 20:22:35,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:22:35,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 20:22:35,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-15 20:22:35,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 20:22:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-10-15 20:22:35,455 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-10-15 20:22:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:35,455 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-10-15 20:22:35,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:35,455 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-10-15 20:22:35,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 20:22:35,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:35,456 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:35,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-15 20:22:35,658 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:35,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:35,658 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-10-15 20:22:35,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:35,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888958090] [2020-10-15 20:22:35,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:35,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888958090] [2020-10-15 20:22:35,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539446966] [2020-10-15 20:22:35,808 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:35,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 20:22:35,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:35,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 20:22:35,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:35,876 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:22:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:35,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:35,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 20:22:35,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271707641] [2020-10-15 20:22:35,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:35,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:35,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:35,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:35,894 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-10-15 20:22:36,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:36,686 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-10-15 20:22:36,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:22:36,687 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-15 20:22:36,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:36,687 INFO L225 Difference]: With dead ends: 100 [2020-10-15 20:22:36,687 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 20:22:36,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:22:36,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 20:22:36,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-15 20:22:36,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 20:22:36,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-15 20:22:36,690 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-10-15 20:22:36,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:36,690 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-15 20:22:36,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:36,690 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-15 20:22:36,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:36,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:36,691 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:36,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-15 20:22:36,892 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:36,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:36,892 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-10-15 20:22:36,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:36,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162245715] [2020-10-15 20:22:36,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:36,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:37,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162245715] [2020-10-15 20:22:37,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716293967] [2020-10-15 20:22:37,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:37,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:37,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:37,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:37,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:37,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:22:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:37,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:37,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:22:37,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978663116] [2020-10-15 20:22:37,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:22:37,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:37,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:22:37,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:22:37,144 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-10-15 20:22:38,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:38,011 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-10-15 20:22:38,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:22:38,011 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:22:38,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:38,011 INFO L225 Difference]: With dead ends: 84 [2020-10-15 20:22:38,012 INFO L226 Difference]: Without dead ends: 79 [2020-10-15 20:22:38,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:22:38,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-15 20:22:38,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-10-15 20:22:38,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-15 20:22:38,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-15 20:22:38,014 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-10-15 20:22:38,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:38,014 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-15 20:22:38,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:22:38,014 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-15 20:22:38,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:38,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:38,015 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:38,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-15 20:22:38,217 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:38,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:38,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-10-15 20:22:38,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:38,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177562474] [2020-10-15 20:22:38,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:38,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177562474] [2020-10-15 20:22:38,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56089997] [2020-10-15 20:22:38,430 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:38,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:22:38,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:38,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:38,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:38,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:38,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:22:38,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864136890] [2020-10-15 20:22:38,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:38,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:38,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:38,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:38,487 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-10-15 20:22:38,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:38,848 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-10-15 20:22:38,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:22:38,848 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:22:38,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:38,849 INFO L225 Difference]: With dead ends: 90 [2020-10-15 20:22:38,849 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 20:22:38,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:22:38,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 20:22:38,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-15 20:22:38,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 20:22:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-15 20:22:38,851 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-10-15 20:22:38,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:38,851 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-15 20:22:38,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:38,852 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-15 20:22:38,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:38,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:38,852 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:39,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:39,056 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:39,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:39,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-10-15 20:22:39,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:39,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234567176] [2020-10-15 20:22:39,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:39,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234567176] [2020-10-15 20:22:39,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593348212] [2020-10-15 20:22:39,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:39,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:22:39,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:39,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:39,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:39,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:39,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:39,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:22:39,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029100735] [2020-10-15 20:22:39,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:22:39,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:39,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:22:39,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:22:39,365 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-10-15 20:22:39,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:39,747 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-10-15 20:22:39,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:22:39,747 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:22:39,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:39,748 INFO L225 Difference]: With dead ends: 106 [2020-10-15 20:22:39,749 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 20:22:39,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:22:39,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 20:22:39,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-15 20:22:39,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 20:22:39,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-10-15 20:22:39,751 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-10-15 20:22:39,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:39,751 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-10-15 20:22:39,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:22:39,752 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-10-15 20:22:39,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:39,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:39,752 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:39,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-15 20:22:39,959 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:39,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:39,960 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-10-15 20:22:39,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:39,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476828105] [2020-10-15 20:22:39,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:40,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476828105] [2020-10-15 20:22:40,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470555634] [2020-10-15 20:22:40,236 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:40,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:40,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:40,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:40,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:22:40,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527636103] [2020-10-15 20:22:40,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:40,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:40,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:40,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:40,352 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-10-15 20:22:40,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:40,774 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-10-15 20:22:40,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:40,775 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:22:40,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:40,776 INFO L225 Difference]: With dead ends: 107 [2020-10-15 20:22:40,776 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:22:40,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:22:40,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:22:40,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-15 20:22:40,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 20:22:40,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-10-15 20:22:40,779 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-10-15 20:22:40,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:40,779 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-10-15 20:22:40,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:40,779 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-10-15 20:22:40,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:40,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:40,779 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:40,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-15 20:22:40,987 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:40,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:40,987 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-10-15 20:22:40,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:40,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991560816] [2020-10-15 20:22:40,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:41,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991560816] [2020-10-15 20:22:41,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767292266] [2020-10-15 20:22:41,206 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:41,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:41,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:41,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:41,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:41,274 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:41,285 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:41,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:41,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:22:41,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566445353] [2020-10-15 20:22:41,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:22:41,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:41,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:22:41,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:22:41,286 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-10-15 20:22:41,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:41,766 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-10-15 20:22:41,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:22:41,767 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:22:41,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:41,768 INFO L225 Difference]: With dead ends: 119 [2020-10-15 20:22:41,768 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 20:22:41,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 20:22:41,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 20:22:41,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-15 20:22:41,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 20:22:41,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-10-15 20:22:41,770 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-10-15 20:22:41,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:41,770 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-10-15 20:22:41,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:22:41,771 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-10-15 20:22:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:41,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:41,771 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:41,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-15 20:22:41,972 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:41,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:41,972 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-10-15 20:22:41,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:41,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599175286] [2020-10-15 20:22:41,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:42,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599175286] [2020-10-15 20:22:42,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140451164] [2020-10-15 20:22:42,180 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:42,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 20:22:42,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:42,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:42,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:42,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:42,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:22:42,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247268264] [2020-10-15 20:22:42,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:42,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:42,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:42,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:42,245 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-10-15 20:22:42,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:42,735 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-10-15 20:22:42,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:22:42,736 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:22:42,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:42,737 INFO L225 Difference]: With dead ends: 119 [2020-10-15 20:22:42,737 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 20:22:42,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:22:42,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 20:22:42,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-10-15 20:22:42,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:22:42,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-10-15 20:22:42,739 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-10-15 20:22:42,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:42,740 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-10-15 20:22:42,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:42,740 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-10-15 20:22:42,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:42,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:42,740 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:42,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:42,949 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:42,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:42,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-10-15 20:22:42,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:42,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824139112] [2020-10-15 20:22:42,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:43,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824139112] [2020-10-15 20:22:43,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777125531] [2020-10-15 20:22:43,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:43,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:43,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:43,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:43,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:43,221 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:43,231 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:43,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:43,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:22:43,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239271822] [2020-10-15 20:22:43,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:22:43,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:43,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:22:43,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:22:43,233 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-10-15 20:22:43,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:43,807 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-10-15 20:22:43,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:22:43,808 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:22:43,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:43,808 INFO L225 Difference]: With dead ends: 116 [2020-10-15 20:22:43,808 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 20:22:43,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:22:43,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 20:22:43,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-10-15 20:22:43,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:22:43,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-10-15 20:22:43,811 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-10-15 20:22:43,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:43,811 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-10-15 20:22:43,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:22:43,811 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-10-15 20:22:43,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:43,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:43,812 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:44,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:44,013 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:44,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:44,013 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-10-15 20:22:44,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:44,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686637298] [2020-10-15 20:22:44,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:44,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686637298] [2020-10-15 20:22:44,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113554453] [2020-10-15 20:22:44,203 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:44,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:22:44,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:44,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:44,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:44,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:44,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:22:44,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47073820] [2020-10-15 20:22:44,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:44,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:44,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:44,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:44,280 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-10-15 20:22:44,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:44,821 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-10-15 20:22:44,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:22:44,822 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:22:44,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:44,823 INFO L225 Difference]: With dead ends: 117 [2020-10-15 20:22:44,823 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 20:22:44,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:22:44,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 20:22:44,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-10-15 20:22:44,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 20:22:44,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-15 20:22:44,826 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-10-15 20:22:44,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:44,826 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-15 20:22:44,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:44,827 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-15 20:22:44,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:44,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:44,827 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:45,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:45,028 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:45,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:45,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-10-15 20:22:45,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:45,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266590740] [2020-10-15 20:22:45,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:45,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266590740] [2020-10-15 20:22:45,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956581393] [2020-10-15 20:22:45,220 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:45,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:22:45,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:45,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:45,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:45,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:45,305 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:45,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:45,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:22:45,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331686435] [2020-10-15 20:22:45,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:22:45,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:45,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:22:45,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:22:45,307 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-10-15 20:22:45,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:45,963 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-10-15 20:22:45,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:22:45,964 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:22:45,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:45,964 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:22:45,965 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 20:22:45,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:22:45,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 20:22:45,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-15 20:22:45,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:22:45,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-15 20:22:45,968 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-10-15 20:22:45,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:45,968 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-15 20:22:45,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:22:45,968 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-15 20:22:45,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:45,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:45,969 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:46,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-15 20:22:46,173 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:46,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:46,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-10-15 20:22:46,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:46,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654981119] [2020-10-15 20:22:46,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:46,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:46,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654981119] [2020-10-15 20:22:46,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761014444] [2020-10-15 20:22:46,361 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:46,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:46,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:46,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:46,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:22:46,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566295794] [2020-10-15 20:22:46,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:46,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:46,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:46,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:46,421 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-10-15 20:22:47,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:47,054 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-10-15 20:22:47,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:22:47,055 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:22:47,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:47,055 INFO L225 Difference]: With dead ends: 115 [2020-10-15 20:22:47,056 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 20:22:47,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:22:47,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 20:22:47,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-10-15 20:22:47,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 20:22:47,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-10-15 20:22:47,058 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-10-15 20:22:47,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:47,058 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-10-15 20:22:47,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:47,058 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-10-15 20:22:47,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:47,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:47,059 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:47,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:47,265 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:47,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:47,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-10-15 20:22:47,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:47,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491480021] [2020-10-15 20:22:47,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:47,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491480021] [2020-10-15 20:22:47,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071559320] [2020-10-15 20:22:47,489 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:47,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:47,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:47,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:47,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:47,582 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:47,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:47,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:22:47,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823784354] [2020-10-15 20:22:47,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:22:47,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:47,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:22:47,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:22:47,597 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-10-15 20:22:48,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:48,323 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-10-15 20:22:48,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:22:48,323 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:22:48,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:48,324 INFO L225 Difference]: With dead ends: 112 [2020-10-15 20:22:48,324 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 20:22:48,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:22:48,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 20:22:48,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-15 20:22:48,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 20:22:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-15 20:22:48,326 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-10-15 20:22:48,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:48,326 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-15 20:22:48,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:22:48,327 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-15 20:22:48,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:48,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:48,327 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:48,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-15 20:22:48,528 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:48,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:48,528 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-10-15 20:22:48,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:48,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291613618] [2020-10-15 20:22:48,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:48,705 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:48,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291613618] [2020-10-15 20:22:48,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993388215] [2020-10-15 20:22:48,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:48,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 20:22:48,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:48,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:48,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:48,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:48,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:22:48,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772164106] [2020-10-15 20:22:48,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:48,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:48,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:48,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:48,780 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-10-15 20:22:49,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:49,432 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-10-15 20:22:49,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:22:49,433 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:22:49,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:49,433 INFO L225 Difference]: With dead ends: 113 [2020-10-15 20:22:49,433 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 20:22:49,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 20:22:49,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 20:22:49,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-15 20:22:49,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:22:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-15 20:22:49,435 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-10-15 20:22:49,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:49,435 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-15 20:22:49,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:49,435 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-15 20:22:49,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:49,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:49,436 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:49,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-15 20:22:49,636 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:49,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:49,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-10-15 20:22:49,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:49,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153989115] [2020-10-15 20:22:49,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:49,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153989115] [2020-10-15 20:22:49,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366502507] [2020-10-15 20:22:49,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:49,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:49,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:49,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:49,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:49,882 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:49,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:49,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:22:49,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400519870] [2020-10-15 20:22:49,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:22:49,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:49,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:22:49,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:22:49,896 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-10-15 20:22:50,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:50,701 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-10-15 20:22:50,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:22:50,702 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:22:50,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:50,702 INFO L225 Difference]: With dead ends: 110 [2020-10-15 20:22:50,702 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 20:22:50,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 20:22:50,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 20:22:50,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-15 20:22:50,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:22:50,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-15 20:22:50,705 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-10-15 20:22:50,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:50,706 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-15 20:22:50,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:22:50,706 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-15 20:22:50,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:50,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:50,706 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:50,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-15 20:22:50,907 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:50,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:50,908 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-10-15 20:22:50,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:50,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142940540] [2020-10-15 20:22:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:51,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142940540] [2020-10-15 20:22:51,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834713253] [2020-10-15 20:22:51,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:51,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:22:51,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:51,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:51,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:51,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:51,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:22:51,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227940562] [2020-10-15 20:22:51,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:51,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:51,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:51,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:51,153 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-10-15 20:22:51,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:51,923 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-15 20:22:51,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:22:51,924 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:22:51,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:51,924 INFO L225 Difference]: With dead ends: 111 [2020-10-15 20:22:51,924 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 20:22:51,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:22:51,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 20:22:51,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-10-15 20:22:51,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 20:22:51,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-15 20:22:51,926 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-10-15 20:22:51,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:51,926 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-15 20:22:51,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:51,927 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-15 20:22:51,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:51,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:51,927 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:52,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:52,128 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:52,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:52,128 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-10-15 20:22:52,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:52,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384735805] [2020-10-15 20:22:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:52,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384735805] [2020-10-15 20:22:52,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074767202] [2020-10-15 20:22:52,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:52,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:22:52,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:52,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:52,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:52,373 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:52,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:52,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:22:52,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007235315] [2020-10-15 20:22:52,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:22:52,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:52,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:22:52,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:22:52,388 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-15 20:22:53,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:53,318 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-10-15 20:22:53,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:22:53,318 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:22:53,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:53,319 INFO L225 Difference]: With dead ends: 108 [2020-10-15 20:22:53,319 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 20:22:53,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:22:53,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 20:22:53,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-15 20:22:53,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 20:22:53,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-15 20:22:53,322 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-10-15 20:22:53,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:53,322 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-15 20:22:53,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:22:53,322 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-15 20:22:53,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:53,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:53,323 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:53,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-15 20:22:53,523 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:53,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:53,524 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-10-15 20:22:53,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:53,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736103707] [2020-10-15 20:22:53,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:53,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:53,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736103707] [2020-10-15 20:22:53,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715906129] [2020-10-15 20:22:53,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:53,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:53,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:53,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:53,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-15 20:22:53,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311689683] [2020-10-15 20:22:53,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:22:53,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:53,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:22:53,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:22:53,754 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-10-15 20:22:54,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:54,542 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-10-15 20:22:54,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:22:54,543 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-15 20:22:54,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:54,543 INFO L225 Difference]: With dead ends: 128 [2020-10-15 20:22:54,543 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 20:22:54,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:22:54,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 20:22:54,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-10-15 20:22:54,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:22:54,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-10-15 20:22:54,546 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-10-15 20:22:54,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:54,546 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-10-15 20:22:54,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:22:54,547 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-10-15 20:22:54,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 20:22:54,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:54,547 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:54,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:54,755 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:54,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:54,755 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-10-15 20:22:54,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:54,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459395222] [2020-10-15 20:22:54,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:54,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459395222] [2020-10-15 20:22:54,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374203323] [2020-10-15 20:22:54,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:54,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:22:54,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:54,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-15 20:22:54,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:54,993 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:55,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:55,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 20:22:55,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987767986] [2020-10-15 20:22:55,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:22:55,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:55,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:22:55,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:22:55,010 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-10-15 20:22:55,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:55,923 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-10-15 20:22:55,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:22:55,924 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-15 20:22:55,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:55,924 INFO L225 Difference]: With dead ends: 109 [2020-10-15 20:22:55,925 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:22:55,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:22:55,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:22:55,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-15 20:22:55,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 20:22:55,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-15 20:22:55,927 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-15 20:22:55,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:55,927 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-15 20:22:55,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:22:55,928 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-15 20:22:55,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:22:55,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:55,928 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:56,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:56,129 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:56,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:56,130 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-10-15 20:22:56,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:56,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594876148] [2020-10-15 20:22:56,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:56,367 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:56,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594876148] [2020-10-15 20:22:56,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974799366] [2020-10-15 20:22:56,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:56,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 20:22:56,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:56,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:22:56,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:56,449 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:56,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:56,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:22:56,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794966633] [2020-10-15 20:22:56,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:22:56,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:56,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:22:56,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:22:56,450 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-15 20:22:56,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:56,875 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-10-15 20:22:56,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:22:56,876 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:22:56,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:56,877 INFO L225 Difference]: With dead ends: 124 [2020-10-15 20:22:56,877 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 20:22:56,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:22:56,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 20:22:56,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-10-15 20:22:56,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:22:56,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:22:56,879 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:22:56,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:56,880 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:22:56,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:22:56,880 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:22:56,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:22:56,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:56,880 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:57,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:57,081 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:57,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:57,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-10-15 20:22:57,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:57,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186379188] [2020-10-15 20:22:57,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:57,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186379188] [2020-10-15 20:22:57,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268317726] [2020-10-15 20:22:57,338 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:57,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:22:57,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:57,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:22:57,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:57,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:57,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:57,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:22:57,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83832206] [2020-10-15 20:22:57,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:22:57,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:57,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:22:57,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:22:57,426 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:22:57,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:57,957 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-15 20:22:57,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:22:57,957 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:22:57,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:57,958 INFO L225 Difference]: With dead ends: 121 [2020-10-15 20:22:57,958 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 20:22:57,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:22:57,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 20:22:57,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-15 20:22:57,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:22:57,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:22:57,961 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:22:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:57,961 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:22:57,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:22:57,961 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:22:57,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:22:57,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:57,962 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:58,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:58,162 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:58,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:58,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-10-15 20:22:58,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:58,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693928212] [2020-10-15 20:22:58,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:58,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693928212] [2020-10-15 20:22:58,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414956321] [2020-10-15 20:22:58,402 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:58,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:22:58,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:58,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:22:58,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:58,463 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:58,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:58,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:22:58,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702125673] [2020-10-15 20:22:58,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:22:58,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:58,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:22:58,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:22:58,464 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:22:58,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:22:58,957 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-15 20:22:58,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:22:58,957 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:22:58,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:22:58,958 INFO L225 Difference]: With dead ends: 118 [2020-10-15 20:22:58,958 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 20:22:58,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 20:22:58,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 20:22:58,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-15 20:22:58,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:22:58,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:22:58,961 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:22:58,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:22:58,961 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:22:58,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:22:58,961 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:22:58,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:22:58,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:22:58,962 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:22:59,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:59,162 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:22:59,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:22:59,163 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-10-15 20:22:59,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:22:59,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668259667] [2020-10-15 20:22:59,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:22:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:22:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:59,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668259667] [2020-10-15 20:22:59,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054554963] [2020-10-15 20:22:59,394 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:22:59,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:22:59,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:22:59,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:22:59,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:22:59,463 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:22:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:22:59,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:22:59,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:22:59,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143434801] [2020-10-15 20:22:59,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:22:59,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:22:59,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:22:59,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:22:59,477 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:00,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:00,093 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-10-15 20:23:00,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:23:00,094 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:00,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:00,094 INFO L225 Difference]: With dead ends: 117 [2020-10-15 20:23:00,095 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 20:23:00,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:23:00,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 20:23:00,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-10-15 20:23:00,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:00,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:00,097 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:00,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:00,097 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:00,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:00,098 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:00,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:00,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:00,098 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:00,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-15 20:23:00,299 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:00,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:00,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-10-15 20:23:00,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:00,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387682481] [2020-10-15 20:23:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:00,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387682481] [2020-10-15 20:23:00,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888258309] [2020-10-15 20:23:00,533 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:00,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:00,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:00,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:00,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:00,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686730014] [2020-10-15 20:23:00,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:00,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:00,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:00,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:00,596 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:01,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:01,137 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-15 20:23:01,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:23:01,138 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:01,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:01,139 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:23:01,139 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 20:23:01,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:23:01,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 20:23:01,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-15 20:23:01,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:01,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:01,141 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:01,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:01,142 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:01,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:01,142 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:01,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:01,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:01,142 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:01,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-15 20:23:01,345 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:01,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:01,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-10-15 20:23:01,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:01,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374937968] [2020-10-15 20:23:01,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:01,571 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:01,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374937968] [2020-10-15 20:23:01,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282711207] [2020-10-15 20:23:01,571 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:01,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:01,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:01,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:01,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:01,639 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:01,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:01,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:01,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690457483] [2020-10-15 20:23:01,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:01,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:01,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:01,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:01,653 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:02,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:02,349 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-15 20:23:02,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:23:02,350 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:02,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:02,351 INFO L225 Difference]: With dead ends: 113 [2020-10-15 20:23:02,351 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 20:23:02,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:23:02,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 20:23:02,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-15 20:23:02,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:02,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:02,353 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:02,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:02,354 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:02,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:02,354 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:02,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:02,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:02,355 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:02,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-15 20:23:02,564 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:02,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:02,564 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-10-15 20:23:02,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:02,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438236174] [2020-10-15 20:23:02,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:02,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438236174] [2020-10-15 20:23:02,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115252467] [2020-10-15 20:23:02,777 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:02,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 20:23:02,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:02,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:02,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:02,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:02,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:02,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710523985] [2020-10-15 20:23:02,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:02,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:02,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:02,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:02,853 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:03,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:03,469 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-10-15 20:23:03,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:23:03,470 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:03,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:03,471 INFO L225 Difference]: With dead ends: 110 [2020-10-15 20:23:03,471 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 20:23:03,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:23:03,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 20:23:03,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-15 20:23:03,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:03,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:03,474 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:03,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:03,474 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:03,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:03,474 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:03,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:03,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:03,474 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:03,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-15 20:23:03,675 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:03,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:03,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-10-15 20:23:03,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:03,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400895626] [2020-10-15 20:23:03,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:03,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400895626] [2020-10-15 20:23:03,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68298224] [2020-10-15 20:23:03,892 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:03,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:03,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:03,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:03,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:03,960 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:03,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:03,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:03,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610577291] [2020-10-15 20:23:03,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:03,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:03,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:03,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:03,975 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:04,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:04,773 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-10-15 20:23:04,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:23:04,774 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:04,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:04,775 INFO L225 Difference]: With dead ends: 109 [2020-10-15 20:23:04,775 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 20:23:04,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 20:23:04,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 20:23:04,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-15 20:23:04,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:04,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:04,777 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:04,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:04,777 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:04,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:04,778 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:04,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:04,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:04,778 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:04,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:04,979 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:04,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:04,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-10-15 20:23:04,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:04,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878541036] [2020-10-15 20:23:04,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:05,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878541036] [2020-10-15 20:23:05,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871958577] [2020-10-15 20:23:05,190 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:05,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:23:05,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:05,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:05,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:05,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:05,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:05,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508413363] [2020-10-15 20:23:05,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:05,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:05,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:05,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:05,260 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:05,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:05,951 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-10-15 20:23:05,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:23:05,951 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:05,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:05,952 INFO L225 Difference]: With dead ends: 106 [2020-10-15 20:23:05,952 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 20:23:05,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:23:05,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 20:23:05,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-15 20:23:05,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:05,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:05,954 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:05,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:05,955 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:05,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:05,955 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:05,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:05,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:05,955 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:06,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-15 20:23:06,156 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:06,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:06,157 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-10-15 20:23:06,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:06,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664711530] [2020-10-15 20:23:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:06,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664711530] [2020-10-15 20:23:06,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749969794] [2020-10-15 20:23:06,367 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:06,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:23:06,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:06,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:06,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:06,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:06,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:06,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:06,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903352223] [2020-10-15 20:23:06,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:06,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:06,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:06,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:06,454 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:07,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:07,317 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-10-15 20:23:07,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:23:07,318 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:07,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:07,319 INFO L225 Difference]: With dead ends: 105 [2020-10-15 20:23:07,319 INFO L226 Difference]: Without dead ends: 99 [2020-10-15 20:23:07,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:23:07,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-15 20:23:07,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-15 20:23:07,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:07,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:07,321 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:07,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:07,322 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:07,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:07,322 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:07,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:07,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:07,322 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:07,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:07,523 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:07,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:07,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-10-15 20:23:07,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:07,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969216199] [2020-10-15 20:23:07,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:07,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969216199] [2020-10-15 20:23:07,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676381334] [2020-10-15 20:23:07,719 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:07,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:07,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:07,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:07,787 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:07,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:07,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:07,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722104733] [2020-10-15 20:23:07,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:07,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:07,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:07,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:07,788 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:08,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:08,523 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-10-15 20:23:08,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:23:08,524 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:08,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:08,531 INFO L225 Difference]: With dead ends: 102 [2020-10-15 20:23:08,531 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 20:23:08,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 20:23:08,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 20:23:08,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-15 20:23:08,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:08,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:08,533 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:08,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:08,533 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:08,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:08,533 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:08,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:08,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:08,533 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:08,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:08,734 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:08,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:08,735 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-10-15 20:23:08,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:08,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162230859] [2020-10-15 20:23:08,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:08,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162230859] [2020-10-15 20:23:08,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634084975] [2020-10-15 20:23:08,936 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:08,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:08,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:08,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:08,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:09,004 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:09,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:09,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:09,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788355269] [2020-10-15 20:23:09,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:09,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:09,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:09,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:09,021 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:09,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:09,987 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-15 20:23:09,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:23:09,988 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:09,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:09,988 INFO L225 Difference]: With dead ends: 101 [2020-10-15 20:23:09,989 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 20:23:09,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:23:09,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 20:23:09,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-15 20:23:09,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:09,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:09,991 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:09,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:09,991 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:09,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:09,991 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:09,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:09,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:09,992 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:10,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-15 20:23:10,200 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:10,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:10,200 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-10-15 20:23:10,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:10,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315905582] [2020-10-15 20:23:10,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:10,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315905582] [2020-10-15 20:23:10,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547435706] [2020-10-15 20:23:10,388 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:10,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 20:23:10,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:10,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:10,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:10,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:10,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:10,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067148464] [2020-10-15 20:23:10,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:10,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:10,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:10,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:10,457 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:11,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:11,260 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-15 20:23:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:23:11,261 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:11,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:11,262 INFO L225 Difference]: With dead ends: 98 [2020-10-15 20:23:11,262 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 20:23:11,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:23:11,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 20:23:11,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-15 20:23:11,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:11,264 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-15 20:23:11,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:11,265 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:11,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:11,265 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:11,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:11,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:11,265 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:11,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:11,466 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:11,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:11,467 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-10-15 20:23:11,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:11,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795973463] [2020-10-15 20:23:11,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:11,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795973463] [2020-10-15 20:23:11,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130156731] [2020-10-15 20:23:11,668 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:11,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:11,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:11,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:11,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:11,736 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:11,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:11,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:11,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890619586] [2020-10-15 20:23:11,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:11,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:11,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:11,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:11,752 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-15 20:23:12,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:12,801 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-10-15 20:23:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:23:12,801 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:12,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:12,802 INFO L225 Difference]: With dead ends: 97 [2020-10-15 20:23:12,802 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 20:23:12,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:23:12,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 20:23:12,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-15 20:23:12,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:12,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:12,805 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-15 20:23:12,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:12,805 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:12,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:12,805 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:12,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:12,805 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:13,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-15 20:23:13,006 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:13,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:13,007 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-10-15 20:23:13,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:13,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424121913] [2020-10-15 20:23:13,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:13,198 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:13,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424121913] [2020-10-15 20:23:13,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504933007] [2020-10-15 20:23:13,199 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:13,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-15 20:23:13,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:13,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:13,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:13,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:13,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-15 20:23:13,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37052105] [2020-10-15 20:23:13,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 20:23:13,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:13,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 20:23:13,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:23:13,268 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-15 20:23:14,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:14,128 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-15 20:23:14,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:23:14,129 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-15 20:23:14,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:14,130 INFO L225 Difference]: With dead ends: 113 [2020-10-15 20:23:14,130 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 20:23:14,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:23:14,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 20:23:14,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-15 20:23:14,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 20:23:14,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-10-15 20:23:14,132 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-10-15 20:23:14,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:14,132 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-10-15 20:23:14,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 20:23:14,133 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-10-15 20:23:14,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:14,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:14,133 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:14,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-15 20:23:14,334 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:14,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:14,334 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-10-15 20:23:14,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:14,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071118334] [2020-10-15 20:23:14,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:14,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:14,533 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:14,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071118334] [2020-10-15 20:23:14,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103574412] [2020-10-15 20:23:14,534 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:14,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 20:23:14,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:14,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:14,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:14,613 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:14,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:14,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:14,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071183707] [2020-10-15 20:23:14,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:14,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:14,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:14,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:14,629 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-10-15 20:23:15,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:15,742 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-10-15 20:23:15,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:23:15,742 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:15,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:15,743 INFO L225 Difference]: With dead ends: 94 [2020-10-15 20:23:15,743 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 20:23:15,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:23:15,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 20:23:15,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-10-15 20:23:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 20:23:15,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-10-15 20:23:15,745 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-10-15 20:23:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:15,746 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-10-15 20:23:15,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:15,746 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-10-15 20:23:15,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 20:23:15,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:15,746 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:15,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-15 20:23:15,947 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:15,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:15,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-10-15 20:23:15,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:15,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26154535] [2020-10-15 20:23:15,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:16,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26154535] [2020-10-15 20:23:16,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428988065] [2020-10-15 20:23:16,140 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:16,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 20:23:16,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:16,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:23:16,224 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:16,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:16,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-15 20:23:16,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046497261] [2020-10-15 20:23:16,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:16,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:16,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:16,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:16,226 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-10-15 20:23:17,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:17,270 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-15 20:23:17,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:23:17,271 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-15 20:23:17,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:17,272 INFO L225 Difference]: With dead ends: 108 [2020-10-15 20:23:17,272 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 20:23:17,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:23:17,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 20:23:17,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-15 20:23:17,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:23:17,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-15 20:23:17,274 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-10-15 20:23:17,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:17,274 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-15 20:23:17,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:17,275 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-15 20:23:17,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:17,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:17,275 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:17,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-15 20:23:17,476 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:17,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:17,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-10-15 20:23:17,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:17,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795242978] [2020-10-15 20:23:17,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:17,689 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:17,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795242978] [2020-10-15 20:23:17,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367412306] [2020-10-15 20:23:17,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:17,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:17,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:17,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:17,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:17,767 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:23:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:17,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:17,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:23:17,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776964544] [2020-10-15 20:23:17,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:17,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:17,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:17,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:17,788 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-10-15 20:23:18,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:18,906 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-10-15 20:23:18,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:23:18,907 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:23:18,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:18,907 INFO L225 Difference]: With dead ends: 90 [2020-10-15 20:23:18,907 INFO L226 Difference]: Without dead ends: 85 [2020-10-15 20:23:18,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:23:18,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-15 20:23:18,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-15 20:23:18,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-15 20:23:18,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-15 20:23:18,910 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-10-15 20:23:18,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:18,910 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-15 20:23:18,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:18,910 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-15 20:23:18,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:18,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:18,910 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:19,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:19,111 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:19,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:19,112 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-10-15 20:23:19,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:19,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250337394] [2020-10-15 20:23:19,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:19,390 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:19,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250337394] [2020-10-15 20:23:19,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773560187] [2020-10-15 20:23:19,391 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:19,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:23:19,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:19,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:19,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:19,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:19,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:23:19,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979181783] [2020-10-15 20:23:19,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:19,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:19,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:19,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:19,453 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-10-15 20:23:19,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:19,924 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-10-15 20:23:19,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:23:19,925 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:23:19,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:19,925 INFO L225 Difference]: With dead ends: 96 [2020-10-15 20:23:19,926 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 20:23:19,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:23:19,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 20:23:19,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-15 20:23:19,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:23:19,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-15 20:23:19,928 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-10-15 20:23:19,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:19,928 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-15 20:23:19,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:19,928 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-15 20:23:19,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:19,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:19,928 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:20,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:20,129 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:20,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:20,130 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-10-15 20:23:20,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:20,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368103535] [2020-10-15 20:23:20,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:20,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368103535] [2020-10-15 20:23:20,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182606355] [2020-10-15 20:23:20,417 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:20,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:20,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:20,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:20,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:20,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:20,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:20,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:23:20,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836263185] [2020-10-15 20:23:20,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:20,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:20,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:20,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:20,504 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-10-15 20:23:20,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:20,986 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-10-15 20:23:20,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:23:20,987 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:23:20,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:20,988 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:23:20,988 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 20:23:20,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:23:20,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 20:23:20,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-15 20:23:20,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-15 20:23:20,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-10-15 20:23:20,990 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-10-15 20:23:20,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:20,990 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-10-15 20:23:20,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:20,990 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-10-15 20:23:20,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:20,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:20,991 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:21,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:21,192 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:21,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:21,192 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-10-15 20:23:21,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:21,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289566588] [2020-10-15 20:23:21,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:21,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289566588] [2020-10-15 20:23:21,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041993794] [2020-10-15 20:23:21,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:21,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:23:21,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:21,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:21,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:21,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:21,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:23:21,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697754083] [2020-10-15 20:23:21,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:21,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:21,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:21,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:21,535 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-10-15 20:23:22,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:22,075 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-10-15 20:23:22,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:23:22,076 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:23:22,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:22,077 INFO L225 Difference]: With dead ends: 115 [2020-10-15 20:23:22,077 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 20:23:22,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:23:22,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 20:23:22,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-15 20:23:22,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 20:23:22,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-10-15 20:23:22,079 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-10-15 20:23:22,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:22,080 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-10-15 20:23:22,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:22,080 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-10-15 20:23:22,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:22,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:22,080 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:22,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:22,281 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:22,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:22,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-10-15 20:23:22,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:22,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096059216] [2020-10-15 20:23:22,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:22,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096059216] [2020-10-15 20:23:22,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093488410] [2020-10-15 20:23:22,567 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:22,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:23:22,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:22,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:22,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:22,642 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:22,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:22,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:23:22,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179390008] [2020-10-15 20:23:22,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:22,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:22,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:22,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:22,656 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-10-15 20:23:23,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:23,246 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-10-15 20:23:23,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:23:23,246 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:23:23,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:23,247 INFO L225 Difference]: With dead ends: 129 [2020-10-15 20:23:23,247 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 20:23:23,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:23:23,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 20:23:23,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-10-15 20:23:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:23:23,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-10-15 20:23:23,250 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-10-15 20:23:23,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:23,250 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-10-15 20:23:23,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:23,251 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-10-15 20:23:23,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:23,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:23,251 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:23,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:23,458 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:23,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:23,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-10-15 20:23:23,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:23,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842676993] [2020-10-15 20:23:23,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:23,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842676993] [2020-10-15 20:23:23,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621555788] [2020-10-15 20:23:23,720 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:23,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:23,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:23,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:23,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:23:23,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435504234] [2020-10-15 20:23:23,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:23,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:23,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:23,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:23,780 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-10-15 20:23:24,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:24,387 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-10-15 20:23:24,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:23:24,388 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:23:24,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:24,388 INFO L225 Difference]: With dead ends: 129 [2020-10-15 20:23:24,388 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 20:23:24,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:23:24,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 20:23:24,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-10-15 20:23:24,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 20:23:24,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-10-15 20:23:24,390 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-10-15 20:23:24,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:24,390 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-10-15 20:23:24,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:24,390 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-10-15 20:23:24,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:24,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:24,391 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:24,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:24,592 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:24,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:24,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-10-15 20:23:24,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:24,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651995180] [2020-10-15 20:23:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:24,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651995180] [2020-10-15 20:23:24,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536744621] [2020-10-15 20:23:24,856 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:24,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:24,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:24,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:24,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:24,927 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:24,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:24,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:23:24,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321873976] [2020-10-15 20:23:24,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:24,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:24,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:24,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:24,942 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-10-15 20:23:25,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:25,644 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-10-15 20:23:25,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:23:25,645 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:23:25,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:25,646 INFO L225 Difference]: With dead ends: 126 [2020-10-15 20:23:25,646 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 20:23:25,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:23:25,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 20:23:25,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-10-15 20:23:25,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 20:23:25,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-10-15 20:23:25,649 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-10-15 20:23:25,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:25,649 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-10-15 20:23:25,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:25,649 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-10-15 20:23:25,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:25,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:25,650 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:25,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:25,850 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:25,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:25,851 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-10-15 20:23:25,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:25,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899332889] [2020-10-15 20:23:25,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:26,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899332889] [2020-10-15 20:23:26,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991466889] [2020-10-15 20:23:26,098 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:26,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:23:26,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:26,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:26,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:26,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:26,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:23:26,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827737594] [2020-10-15 20:23:26,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:26,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:26,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:26,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:26,167 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-10-15 20:23:26,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:26,841 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-10-15 20:23:26,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:23:26,842 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:23:26,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:26,842 INFO L225 Difference]: With dead ends: 127 [2020-10-15 20:23:26,842 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 20:23:26,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 20:23:26,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 20:23:26,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-10-15 20:23:26,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:23:26,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-10-15 20:23:26,844 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-10-15 20:23:26,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:26,844 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-10-15 20:23:26,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:26,844 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-10-15 20:23:26,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:26,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:26,845 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:27,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-15 20:23:27,045 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:27,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:27,046 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-10-15 20:23:27,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:27,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31305007] [2020-10-15 20:23:27,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:27,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31305007] [2020-10-15 20:23:27,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578600697] [2020-10-15 20:23:27,298 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:27,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:27,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:27,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:27,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:27,371 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:27,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:27,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:23:27,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185221950] [2020-10-15 20:23:27,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:27,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:27,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:27,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:27,386 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-10-15 20:23:28,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:28,177 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-10-15 20:23:28,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:23:28,178 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:23:28,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:28,178 INFO L225 Difference]: With dead ends: 124 [2020-10-15 20:23:28,179 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 20:23:28,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 20:23:28,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 20:23:28,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-15 20:23:28,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:23:28,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-10-15 20:23:28,180 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-10-15 20:23:28,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:28,181 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-10-15 20:23:28,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:28,181 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-10-15 20:23:28,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:28,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:28,181 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:28,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-15 20:23:28,382 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:28,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:28,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-10-15 20:23:28,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:28,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580235805] [2020-10-15 20:23:28,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:28,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580235805] [2020-10-15 20:23:28,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952224849] [2020-10-15 20:23:28,622 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:28,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:23:28,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:28,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:28,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:28,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:28,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:23:28,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38032192] [2020-10-15 20:23:28,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:28,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:28,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:28,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:28,691 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-10-15 20:23:29,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:29,478 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-10-15 20:23:29,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:23:29,479 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:23:29,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:29,480 INFO L225 Difference]: With dead ends: 125 [2020-10-15 20:23:29,480 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 20:23:29,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:23:29,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 20:23:29,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-10-15 20:23:29,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 20:23:29,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-15 20:23:29,484 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-10-15 20:23:29,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:29,484 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-15 20:23:29,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:29,485 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-15 20:23:29,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:29,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:29,486 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:29,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-15 20:23:29,694 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:29,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:29,695 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-10-15 20:23:29,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:29,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927201165] [2020-10-15 20:23:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:30,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927201165] [2020-10-15 20:23:30,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543446824] [2020-10-15 20:23:30,058 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:30,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:23:30,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:30,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:30,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:30,197 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:30,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:30,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:23:30,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853852671] [2020-10-15 20:23:30,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:30,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:30,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:30,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:30,223 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-10-15 20:23:31,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:31,521 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-10-15 20:23:31,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:23:31,523 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:23:31,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:31,524 INFO L225 Difference]: With dead ends: 122 [2020-10-15 20:23:31,524 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 20:23:31,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:23:31,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 20:23:31,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-10-15 20:23:31,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 20:23:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-15 20:23:31,528 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-10-15 20:23:31,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:31,528 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-15 20:23:31,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:31,528 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-15 20:23:31,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:31,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:31,529 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:31,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-15 20:23:31,739 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:31,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:31,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-10-15 20:23:31,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:31,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632820355] [2020-10-15 20:23:31,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:32,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632820355] [2020-10-15 20:23:32,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025926228] [2020-10-15 20:23:32,091 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:32,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:32,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:32,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:32,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:23:32,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669611753] [2020-10-15 20:23:32,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:32,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:32,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:32,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:32,208 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-10-15 20:23:33,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:33,240 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-15 20:23:33,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:23:33,241 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:23:33,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:33,241 INFO L225 Difference]: With dead ends: 123 [2020-10-15 20:23:33,241 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 20:23:33,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:23:33,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 20:23:33,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-15 20:23:33,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 20:23:33,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-10-15 20:23:33,244 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-10-15 20:23:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:33,244 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-10-15 20:23:33,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:33,244 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-10-15 20:23:33,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:33,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:33,245 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:33,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:33,446 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:33,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:33,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-10-15 20:23:33,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:33,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990689121] [2020-10-15 20:23:33,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:33,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990689121] [2020-10-15 20:23:33,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671034576] [2020-10-15 20:23:33,682 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:33,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:33,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:33,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:33,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:33,753 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:33,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:33,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:23:33,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844585917] [2020-10-15 20:23:33,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:33,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:33,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:33,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:33,770 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-10-15 20:23:34,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:34,726 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-10-15 20:23:34,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:23:34,727 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:23:34,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:34,728 INFO L225 Difference]: With dead ends: 120 [2020-10-15 20:23:34,728 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 20:23:34,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:23:34,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 20:23:34,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-10-15 20:23:34,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 20:23:34,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-15 20:23:34,730 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-10-15 20:23:34,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:34,730 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-15 20:23:34,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:34,731 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-15 20:23:34,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:34,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:34,731 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:34,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:34,932 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:34,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:34,932 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-10-15 20:23:34,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:34,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921063493] [2020-10-15 20:23:34,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:35,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921063493] [2020-10-15 20:23:35,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040658210] [2020-10-15 20:23:35,163 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:35,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:23:35,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:35,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:35,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:35,233 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:35,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:35,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:23:35,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480711557] [2020-10-15 20:23:35,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:35,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:35,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:35,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:35,234 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-10-15 20:23:36,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:36,098 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-15 20:23:36,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:23:36,099 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:23:36,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:36,100 INFO L225 Difference]: With dead ends: 121 [2020-10-15 20:23:36,100 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 20:23:36,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:23:36,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 20:23:36,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-15 20:23:36,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:23:36,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-15 20:23:36,103 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-10-15 20:23:36,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:36,103 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-15 20:23:36,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:36,103 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-15 20:23:36,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:36,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:36,104 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:36,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-15 20:23:36,304 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:36,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:36,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-10-15 20:23:36,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:36,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208549675] [2020-10-15 20:23:36,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:36,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208549675] [2020-10-15 20:23:36,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101536165] [2020-10-15 20:23:36,530 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:36,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:36,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:36,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:36,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:36,611 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:36,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:36,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:23:36,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552338526] [2020-10-15 20:23:36,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:36,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:36,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:36,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:36,631 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-10-15 20:23:37,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:37,710 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-15 20:23:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:23:37,711 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:23:37,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:37,712 INFO L225 Difference]: With dead ends: 118 [2020-10-15 20:23:37,712 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 20:23:37,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:23:37,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 20:23:37,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-15 20:23:37,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:23:37,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-15 20:23:37,714 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-10-15 20:23:37,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:37,714 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-15 20:23:37,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:37,715 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-15 20:23:37,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:37,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:37,715 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:37,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:37,916 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:37,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:37,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-10-15 20:23:37,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:37,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406937307] [2020-10-15 20:23:37,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:37,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:38,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406937307] [2020-10-15 20:23:38,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267723398] [2020-10-15 20:23:38,151 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:38,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:23:38,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:38,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:38,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:38,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:38,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:23:38,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590229248] [2020-10-15 20:23:38,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:38,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:38,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:38,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:38,225 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-10-15 20:23:39,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:39,137 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-10-15 20:23:39,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:23:39,138 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:23:39,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:39,139 INFO L225 Difference]: With dead ends: 119 [2020-10-15 20:23:39,139 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 20:23:39,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:23:39,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 20:23:39,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-15 20:23:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 20:23:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-15 20:23:39,142 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-10-15 20:23:39,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:39,143 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-15 20:23:39,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:39,143 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-15 20:23:39,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:39,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:39,143 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:39,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:39,352 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:39,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:39,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-10-15 20:23:39,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:39,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552373831] [2020-10-15 20:23:39,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:39,577 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:39,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552373831] [2020-10-15 20:23:39,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277284323] [2020-10-15 20:23:39,578 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:39,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:23:39,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:39,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:39,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:39,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:39,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:39,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:23:39,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873971555] [2020-10-15 20:23:39,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:39,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:39,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:39,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:39,679 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-15 20:23:40,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:40,847 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-10-15 20:23:40,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:23:40,847 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:23:40,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:40,848 INFO L225 Difference]: With dead ends: 116 [2020-10-15 20:23:40,848 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 20:23:40,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:23:40,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 20:23:40,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-10-15 20:23:40,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:23:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-15 20:23:40,851 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-10-15 20:23:40,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:40,851 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-15 20:23:40,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:40,852 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-15 20:23:40,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:40,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:40,853 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:41,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:41,053 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:41,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:41,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-10-15 20:23:41,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:41,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385945456] [2020-10-15 20:23:41,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:41,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385945456] [2020-10-15 20:23:41,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242551252] [2020-10-15 20:23:41,274 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:41,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:41,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:41,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:41,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-15 20:23:41,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157320467] [2020-10-15 20:23:41,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 20:23:41,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:41,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 20:23:41,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-15 20:23:41,344 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-10-15 20:23:42,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:42,315 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-15 20:23:42,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:23:42,315 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-15 20:23:42,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:42,316 INFO L225 Difference]: With dead ends: 136 [2020-10-15 20:23:42,316 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 20:23:42,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:23:42,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 20:23:42,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-10-15 20:23:42,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 20:23:42,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-10-15 20:23:42,320 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-10-15 20:23:42,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:42,320 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-10-15 20:23:42,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 20:23:42,320 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-10-15 20:23:42,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 20:23:42,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:42,321 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:42,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:42,529 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:42,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:42,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-10-15 20:23:42,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:42,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248557798] [2020-10-15 20:23:42,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:42,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248557798] [2020-10-15 20:23:42,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434320568] [2020-10-15 20:23:42,754 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:42,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:42,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:42,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 20:23:42,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:42,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:42,847 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:42,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:42,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 20:23:42,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715702254] [2020-10-15 20:23:42,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:42,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:42,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:42,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:42,848 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-10-15 20:23:44,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:44,050 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-10-15 20:23:44,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:23:44,051 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-15 20:23:44,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:44,052 INFO L225 Difference]: With dead ends: 117 [2020-10-15 20:23:44,052 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 20:23:44,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:23:44,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 20:23:44,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-15 20:23:44,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 20:23:44,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-15 20:23:44,053 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-15 20:23:44,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:44,054 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-15 20:23:44,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:44,055 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-15 20:23:44,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:44,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:44,056 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:44,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:44,262 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:44,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:44,262 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-10-15 20:23:44,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:44,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121047858] [2020-10-15 20:23:44,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:44,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:44,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121047858] [2020-10-15 20:23:44,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199038701] [2020-10-15 20:23:44,583 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:44,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:23:44,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:44,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:44,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:44,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:44,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:23:44,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94227339] [2020-10-15 20:23:44,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:44,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:44,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:44,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:44,649 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-15 20:23:45,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:45,200 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-15 20:23:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:23:45,201 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:23:45,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:45,202 INFO L225 Difference]: With dead ends: 134 [2020-10-15 20:23:45,202 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 20:23:45,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:23:45,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 20:23:45,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-10-15 20:23:45,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:23:45,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:23:45,205 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:23:45,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:45,205 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:23:45,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:45,205 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:23:45,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:45,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:45,205 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:45,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-15 20:23:45,406 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:45,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:45,407 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-10-15 20:23:45,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:45,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429846047] [2020-10-15 20:23:45,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:45,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429846047] [2020-10-15 20:23:45,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768168959] [2020-10-15 20:23:45,740 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:45,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:45,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:45,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:45,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:45,813 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:45,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:45,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:23:45,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531209209] [2020-10-15 20:23:45,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:23:45,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:45,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:23:45,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:23:45,828 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:23:46,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:46,471 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-10-15 20:23:46,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:23:46,472 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:23:46,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:46,473 INFO L225 Difference]: With dead ends: 131 [2020-10-15 20:23:46,473 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 20:23:46,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:23:46,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 20:23:46,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-15 20:23:46,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:23:46,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:23:46,476 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:23:46,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:46,476 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:23:46,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:23:46,476 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:23:46,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:46,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:46,476 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:46,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-15 20:23:46,677 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:46,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:46,678 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-10-15 20:23:46,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:46,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012585853] [2020-10-15 20:23:46,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:46,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012585853] [2020-10-15 20:23:46,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2673301] [2020-10-15 20:23:46,987 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:47,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:23:47,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:47,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:47,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:47,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:47,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:23:47,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812354376] [2020-10-15 20:23:47,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:47,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:47,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:47,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:47,051 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:23:47,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:47,666 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-10-15 20:23:47,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:23:47,667 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:23:47,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:47,668 INFO L225 Difference]: With dead ends: 128 [2020-10-15 20:23:47,668 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 20:23:47,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:23:47,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 20:23:47,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-10-15 20:23:47,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:23:47,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:23:47,671 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:23:47,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:47,671 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:23:47,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:47,671 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:23:47,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:47,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:47,671 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:47,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:47,872 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:47,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:47,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-10-15 20:23:47,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:47,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843782618] [2020-10-15 20:23:47,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:48,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843782618] [2020-10-15 20:23:48,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239782743] [2020-10-15 20:23:48,195 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:48,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:23:48,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:48,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:48,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:48,272 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:48,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:48,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:23:48,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502291343] [2020-10-15 20:23:48,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:23:48,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:48,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:23:48,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:23:48,286 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:23:49,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:49,025 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-10-15 20:23:49,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:23:49,026 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:23:49,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:49,026 INFO L225 Difference]: With dead ends: 127 [2020-10-15 20:23:49,027 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 20:23:49,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 20:23:49,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 20:23:49,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-10-15 20:23:49,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:23:49,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:23:49,029 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:23:49,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:49,029 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:23:49,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:23:49,030 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:23:49,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:49,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:49,030 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:49,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-15 20:23:49,231 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:49,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:49,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-10-15 20:23:49,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:49,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75821433] [2020-10-15 20:23:49,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:49,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75821433] [2020-10-15 20:23:49,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594774247] [2020-10-15 20:23:49,525 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:49,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:49,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:49,597 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:49,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:49,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:23:49,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949530076] [2020-10-15 20:23:49,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:49,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:49,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:49,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:49,599 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:23:50,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:50,293 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-15 20:23:50,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:23:50,294 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:23:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:50,295 INFO L225 Difference]: With dead ends: 124 [2020-10-15 20:23:50,295 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 20:23:50,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:23:50,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 20:23:50,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-15 20:23:50,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:23:50,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:23:50,297 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:23:50,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:50,297 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:23:50,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:50,298 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:23:50,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:50,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:50,298 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:50,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:50,499 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:50,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:50,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-10-15 20:23:50,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:50,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905250589] [2020-10-15 20:23:50,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:50,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905250589] [2020-10-15 20:23:50,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849267211] [2020-10-15 20:23:50,801 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:50,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:50,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:50,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:50,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:50,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:50,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:50,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:23:50,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260539268] [2020-10-15 20:23:50,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:23:50,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:50,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:23:50,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:23:50,887 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:23:51,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:51,712 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-15 20:23:51,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:23:51,713 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:23:51,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:51,713 INFO L225 Difference]: With dead ends: 123 [2020-10-15 20:23:51,713 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 20:23:51,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:23:51,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 20:23:51,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-15 20:23:51,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:23:51,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:23:51,715 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:23:51,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:51,716 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:23:51,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:23:51,716 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:23:51,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:51,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:51,716 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:51,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:51,917 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:51,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:51,917 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-10-15 20:23:51,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:51,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883749063] [2020-10-15 20:23:51,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:52,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883749063] [2020-10-15 20:23:52,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031240973] [2020-10-15 20:23:52,199 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:52,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:23:52,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:52,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:52,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:52,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:52,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:23:52,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864595960] [2020-10-15 20:23:52,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:52,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:52,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:52,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:52,267 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:23:53,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:53,028 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-15 20:23:53,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:23:53,028 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:23:53,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:53,029 INFO L225 Difference]: With dead ends: 120 [2020-10-15 20:23:53,029 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 20:23:53,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 20:23:53,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 20:23:53,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-15 20:23:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:23:53,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:23:53,032 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:23:53,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:53,033 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:23:53,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:53,033 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:23:53,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:53,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:53,033 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:53,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:53,234 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:53,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:53,235 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-10-15 20:23:53,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:53,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387131453] [2020-10-15 20:23:53,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:53,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387131453] [2020-10-15 20:23:53,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240417425] [2020-10-15 20:23:53,521 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:53,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:23:53,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:53,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:53,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:53,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:53,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:53,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:23:53,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980409571] [2020-10-15 20:23:53,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:23:53,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:53,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:23:53,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:23:53,612 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:23:54,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:54,796 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-10-15 20:23:54,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:23:54,797 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:23:54,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:54,799 INFO L225 Difference]: With dead ends: 119 [2020-10-15 20:23:54,799 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 20:23:54,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:23:54,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 20:23:54,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-15 20:23:54,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:23:54,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:23:54,802 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:23:54,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:54,803 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:23:54,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:23:54,803 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:23:54,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:54,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:54,804 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:55,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:55,015 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:55,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:55,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-10-15 20:23:55,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:55,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333130257] [2020-10-15 20:23:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:55,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333130257] [2020-10-15 20:23:55,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723549525] [2020-10-15 20:23:55,292 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:55,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:23:55,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:55,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:55,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:55,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:55,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:23:55,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210602264] [2020-10-15 20:23:55,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:55,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:55,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:55,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:55,374 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:23:56,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:56,199 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-10-15 20:23:56,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:23:56,199 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:23:56,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:56,200 INFO L225 Difference]: With dead ends: 116 [2020-10-15 20:23:56,200 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 20:23:56,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:23:56,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 20:23:56,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-10-15 20:23:56,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:23:56,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:23:56,202 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:23:56,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:56,203 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:23:56,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:56,203 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:23:56,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:56,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:56,203 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:56,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-15 20:23:56,404 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:56,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:56,404 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-10-15 20:23:56,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:56,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949256854] [2020-10-15 20:23:56,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:56,679 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:56,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949256854] [2020-10-15 20:23:56,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827850422] [2020-10-15 20:23:56,680 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:56,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:23:56,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:56,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:56,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:56,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:56,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:56,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:23:56,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281978753] [2020-10-15 20:23:56,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:23:56,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:56,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:23:56,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:23:56,771 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:23:57,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:57,816 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-10-15 20:23:57,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:23:57,816 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:23:57,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:57,817 INFO L225 Difference]: With dead ends: 115 [2020-10-15 20:23:57,818 INFO L226 Difference]: Without dead ends: 109 [2020-10-15 20:23:57,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:23:57,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-15 20:23:57,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-15 20:23:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:23:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:23:57,821 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:23:57,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:57,821 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:23:57,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:23:57,821 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:23:57,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:57,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:57,822 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:58,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:58,032 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:58,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:58,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-10-15 20:23:58,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:58,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407556181] [2020-10-15 20:23:58,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:58,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407556181] [2020-10-15 20:23:58,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508996658] [2020-10-15 20:23:58,297 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:58,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:58,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:58,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:58,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:23:58,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345788861] [2020-10-15 20:23:58,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:23:58,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:58,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:23:58,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:23:58,369 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:23:59,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:23:59,306 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-15 20:23:59,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:23:59,307 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:23:59,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:23:59,308 INFO L225 Difference]: With dead ends: 112 [2020-10-15 20:23:59,308 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 20:23:59,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:23:59,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 20:23:59,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-15 20:23:59,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:23:59,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:23:59,311 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:23:59,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:23:59,311 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:23:59,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:23:59,311 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:23:59,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:23:59,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:23:59,312 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:23:59,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-15 20:23:59,513 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:23:59,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:23:59,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-10-15 20:23:59,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:23:59,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923439305] [2020-10-15 20:23:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:23:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:23:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:59,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923439305] [2020-10-15 20:23:59,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653701547] [2020-10-15 20:23:59,780 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:23:59,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:23:59,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:23:59,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:23:59,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:23:59,856 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:23:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:23:59,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:23:59,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:23:59,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442071778] [2020-10-15 20:23:59,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:23:59,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:23:59,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:23:59,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:23:59,878 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:24:01,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:01,036 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-10-15 20:24:01,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:24:01,037 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:01,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:01,037 INFO L225 Difference]: With dead ends: 111 [2020-10-15 20:24:01,037 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 20:24:01,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:24:01,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 20:24:01,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-15 20:24:01,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:01,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:01,040 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:24:01,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:01,040 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:01,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:01,041 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:01,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:01,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:01,041 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:01,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-15 20:24:01,242 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:01,242 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-10-15 20:24:01,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:01,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685549342] [2020-10-15 20:24:01,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:01,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685549342] [2020-10-15 20:24:01,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856923321] [2020-10-15 20:24:01,505 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:01,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:24:01,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:01,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:01,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:01,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:01,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:01,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790019556] [2020-10-15 20:24:01,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:01,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:01,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:01,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:01,579 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:02,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:02,547 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-15 20:24:02,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:24:02,547 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:02,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:02,548 INFO L225 Difference]: With dead ends: 108 [2020-10-15 20:24:02,548 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 20:24:02,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:24:02,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 20:24:02,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-15 20:24:02,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:02,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:02,550 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:24:02,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:02,551 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:02,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:02,551 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:02,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:02,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:02,551 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:02,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:02,753 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:02,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:02,753 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-10-15 20:24:02,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:02,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395716602] [2020-10-15 20:24:02,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:03,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395716602] [2020-10-15 20:24:03,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508212697] [2020-10-15 20:24:03,016 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:03,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:03,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:03,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:03,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:03,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:03,107 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:03,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:03,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:03,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681577990] [2020-10-15 20:24:03,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:03,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:03,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:03,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:03,109 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:24:04,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:04,387 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-15 20:24:04,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:24:04,388 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:04,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:04,389 INFO L225 Difference]: With dead ends: 107 [2020-10-15 20:24:04,389 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 20:24:04,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:24:04,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 20:24:04,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-15 20:24:04,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:04,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:04,392 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:24:04,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:04,392 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:04,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:04,392 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:04,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:04,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:04,393 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:04,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:04,594 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:04,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:04,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-10-15 20:24:04,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:04,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086376289] [2020-10-15 20:24:04,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:04,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086376289] [2020-10-15 20:24:04,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507893309] [2020-10-15 20:24:04,866 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:04,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-15 20:24:04,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:04,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:04,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:04,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:04,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:04,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713930625] [2020-10-15 20:24:04,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:04,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:04,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:04,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:04,942 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:05,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:05,994 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-10-15 20:24:05,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:24:05,995 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:05,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:05,995 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:24:05,996 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 20:24:05,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:24:05,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 20:24:05,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-15 20:24:05,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:05,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:05,997 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-15 20:24:05,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:05,998 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:05,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:05,998 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:05,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:05,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:05,998 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:06,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:06,199 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:06,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:06,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-10-15 20:24:06,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:06,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094012680] [2020-10-15 20:24:06,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:06,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094012680] [2020-10-15 20:24:06,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742733069] [2020-10-15 20:24:06,467 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:06,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 20:24:06,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:06,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:06,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:06,555 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:06,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:06,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:06,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710430779] [2020-10-15 20:24:06,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:06,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:06,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:06,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:06,575 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-15 20:24:07,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:07,967 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-10-15 20:24:07,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:24:07,968 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:07,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:07,968 INFO L225 Difference]: With dead ends: 103 [2020-10-15 20:24:07,968 INFO L226 Difference]: Without dead ends: 97 [2020-10-15 20:24:07,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 20:24:07,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-15 20:24:07,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-15 20:24:07,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:07,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:07,971 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-15 20:24:07,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:07,971 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:07,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:07,972 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:07,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:07,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:07,972 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:08,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-10-15 20:24:08,181 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:08,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:08,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-10-15 20:24:08,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:08,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072438367] [2020-10-15 20:24:08,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:08,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072438367] [2020-10-15 20:24:08,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620392108] [2020-10-15 20:24:08,441 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:08,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:08,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:08,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:08,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-15 20:24:08,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795483744] [2020-10-15 20:24:08,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 20:24:08,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:08,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 20:24:08,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-15 20:24:08,515 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-15 20:24:09,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:09,639 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-15 20:24:09,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:24:09,640 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-15 20:24:09,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:09,641 INFO L225 Difference]: With dead ends: 119 [2020-10-15 20:24:09,641 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 20:24:09,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:24:09,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 20:24:09,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-10-15 20:24:09,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 20:24:09,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-10-15 20:24:09,643 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-10-15 20:24:09,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:09,644 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-10-15 20:24:09,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 20:24:09,644 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-10-15 20:24:09,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:09,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:09,644 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:09,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:09,845 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:09,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:09,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-10-15 20:24:09,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:09,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223556727] [2020-10-15 20:24:09,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:10,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223556727] [2020-10-15 20:24:10,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458894253] [2020-10-15 20:24:10,106 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:10,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:10,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:10,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:10,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:10,182 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:10,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:10,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:10,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215366773] [2020-10-15 20:24:10,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:10,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:10,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:10,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:10,211 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-10-15 20:24:11,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:11,727 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-10-15 20:24:11,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:24:11,727 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:11,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:11,728 INFO L225 Difference]: With dead ends: 100 [2020-10-15 20:24:11,728 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 20:24:11,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:24:11,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 20:24:11,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-15 20:24:11,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 20:24:11,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-10-15 20:24:11,731 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-10-15 20:24:11,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:11,731 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-10-15 20:24:11,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:11,731 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-10-15 20:24:11,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 20:24:11,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:11,731 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:11,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:11,932 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:11,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:11,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-10-15 20:24:11,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:11,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241963114] [2020-10-15 20:24:11,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:12,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241963114] [2020-10-15 20:24:12,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685606557] [2020-10-15 20:24:12,192 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:12,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-15 20:24:12,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:12,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 20:24:12,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:12,281 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:24:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:12,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:12,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-15 20:24:12,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697824852] [2020-10-15 20:24:12,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:12,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:12,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:12,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:12,307 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-10-15 20:24:13,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:13,651 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-10-15 20:24:13,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:24:13,652 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-15 20:24:13,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:13,653 INFO L225 Difference]: With dead ends: 116 [2020-10-15 20:24:13,653 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 20:24:13,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:24:13,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 20:24:13,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-10-15 20:24:13,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 20:24:13,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-15 20:24:13,655 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-10-15 20:24:13,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:13,656 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-15 20:24:13,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:13,656 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-15 20:24:13,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:13,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:13,656 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:13,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:13,857 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:13,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:13,857 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-10-15 20:24:13,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:13,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897947732] [2020-10-15 20:24:13,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:14,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897947732] [2020-10-15 20:24:14,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552867973] [2020-10-15 20:24:14,152 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:14,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:14,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:14,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:14,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:14,229 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:24:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:14,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:14,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:14,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60274376] [2020-10-15 20:24:14,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:14,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:14,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:14,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:14,255 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-10-15 20:24:15,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:15,706 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-10-15 20:24:15,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:24:15,706 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:15,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:15,707 INFO L225 Difference]: With dead ends: 96 [2020-10-15 20:24:15,707 INFO L226 Difference]: Without dead ends: 91 [2020-10-15 20:24:15,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:24:15,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-15 20:24:15,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-15 20:24:15,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 20:24:15,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-15 20:24:15,708 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-10-15 20:24:15,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:15,709 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-15 20:24:15,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:15,709 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-15 20:24:15,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:15,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:15,709 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:15,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:15,910 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:15,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:15,911 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-10-15 20:24:15,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:15,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16721161] [2020-10-15 20:24:15,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:16,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16721161] [2020-10-15 20:24:16,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574376376] [2020-10-15 20:24:16,289 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:16,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:24:16,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:16,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:16,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:16,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:16,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:16,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565659410] [2020-10-15 20:24:16,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:16,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:16,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:16,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:16,353 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-10-15 20:24:16,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:16,936 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-10-15 20:24:16,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:24:16,937 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:16,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:16,938 INFO L225 Difference]: With dead ends: 102 [2020-10-15 20:24:16,938 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 20:24:16,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:24:16,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 20:24:16,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-15 20:24:16,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:24:16,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-15 20:24:16,940 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-10-15 20:24:16,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:16,941 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-15 20:24:16,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:16,941 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-15 20:24:16,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:16,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:16,941 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:17,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-10-15 20:24:17,142 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:17,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:17,142 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-10-15 20:24:17,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:17,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719865236] [2020-10-15 20:24:17,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:17,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719865236] [2020-10-15 20:24:17,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116711476] [2020-10-15 20:24:17,535 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:17,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:24:17,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:17,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:17,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:17,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:17,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:17,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:17,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323876044] [2020-10-15 20:24:17,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:17,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:17,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:17,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:17,626 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-10-15 20:24:18,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:18,294 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-10-15 20:24:18,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:24:18,295 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:18,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:18,295 INFO L225 Difference]: With dead ends: 122 [2020-10-15 20:24:18,295 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 20:24:18,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:24:18,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 20:24:18,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-15 20:24:18,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-15 20:24:18,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-10-15 20:24:18,298 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-10-15 20:24:18,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:18,298 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-10-15 20:24:18,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:18,299 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-10-15 20:24:18,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:18,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:18,299 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:18,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-15 20:24:18,500 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:18,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:18,501 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-10-15 20:24:18,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:18,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913143486] [2020-10-15 20:24:18,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:18,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913143486] [2020-10-15 20:24:18,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946404337] [2020-10-15 20:24:18,891 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:18,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:18,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:18,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:18,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:18,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784181251] [2020-10-15 20:24:18,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:18,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:18,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:18,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:18,953 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-10-15 20:24:19,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:19,645 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-10-15 20:24:19,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:24:19,646 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:19,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:19,647 INFO L225 Difference]: With dead ends: 123 [2020-10-15 20:24:19,647 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 20:24:19,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:24:19,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 20:24:19,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-15 20:24:19,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 20:24:19,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-10-15 20:24:19,649 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-10-15 20:24:19,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:19,649 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-10-15 20:24:19,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:19,650 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-10-15 20:24:19,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:19,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:19,650 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:19,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-15 20:24:19,851 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:19,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:19,851 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-10-15 20:24:19,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:19,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868072935] [2020-10-15 20:24:19,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:19,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:20,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868072935] [2020-10-15 20:24:20,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880844293] [2020-10-15 20:24:20,243 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:20,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:20,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:20,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:20,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:20,316 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:20,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:20,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:20,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000476985] [2020-10-15 20:24:20,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:20,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:20,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:20,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:20,332 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-10-15 20:24:21,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:21,090 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-10-15 20:24:21,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:24:21,091 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:21,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:21,092 INFO L225 Difference]: With dead ends: 139 [2020-10-15 20:24:21,092 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 20:24:21,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 20:24:21,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 20:24:21,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-10-15 20:24:21,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 20:24:21,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-10-15 20:24:21,095 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-10-15 20:24:21,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:21,095 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-10-15 20:24:21,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:21,095 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-10-15 20:24:21,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:21,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:21,096 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:21,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-15 20:24:21,302 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:21,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:21,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-10-15 20:24:21,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:21,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633010581] [2020-10-15 20:24:21,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:21,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633010581] [2020-10-15 20:24:21,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305186628] [2020-10-15 20:24:21,663 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:21,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:24:21,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:21,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:21,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:21,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:21,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:21,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325591998] [2020-10-15 20:24:21,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:21,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:21,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:21,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:21,735 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-10-15 20:24:22,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:22,530 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-10-15 20:24:22,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:24:22,531 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:22,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:22,531 INFO L225 Difference]: With dead ends: 139 [2020-10-15 20:24:22,531 INFO L226 Difference]: Without dead ends: 133 [2020-10-15 20:24:22,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:24:22,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-15 20:24:22,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-10-15 20:24:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 20:24:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-10-15 20:24:22,533 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-10-15 20:24:22,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:22,533 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-10-15 20:24:22,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:22,534 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-10-15 20:24:22,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:22,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:22,534 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:22,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:22,735 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:22,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:22,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-10-15 20:24:22,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:22,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806792592] [2020-10-15 20:24:22,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:23,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806792592] [2020-10-15 20:24:23,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595684358] [2020-10-15 20:24:23,106 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:23,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:23,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:23,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:23,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:23,181 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:23,195 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:23,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:23,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:23,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74438415] [2020-10-15 20:24:23,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:23,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:23,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:23,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:23,196 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-10-15 20:24:24,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:24,085 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-10-15 20:24:24,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:24:24,086 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:24,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:24,086 INFO L225 Difference]: With dead ends: 136 [2020-10-15 20:24:24,086 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 20:24:24,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:24:24,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 20:24:24,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-15 20:24:24,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 20:24:24,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-10-15 20:24:24,089 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-10-15 20:24:24,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:24,089 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-10-15 20:24:24,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:24,089 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-10-15 20:24:24,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:24,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:24,090 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:24,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-15 20:24:24,290 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:24,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:24,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-10-15 20:24:24,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:24,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714844517] [2020-10-15 20:24:24,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:24,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714844517] [2020-10-15 20:24:24,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556691340] [2020-10-15 20:24:24,634 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:24,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:24:24,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:24,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:24,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:24,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:24,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:24,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617443220] [2020-10-15 20:24:24,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:24,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:24,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:24,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:24,714 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-10-15 20:24:25,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:25,565 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-10-15 20:24:25,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:24:25,566 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:25,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:25,566 INFO L225 Difference]: With dead ends: 137 [2020-10-15 20:24:25,566 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 20:24:25,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:24:25,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 20:24:25,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-10-15 20:24:25,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 20:24:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-10-15 20:24:25,569 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-10-15 20:24:25,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:25,570 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-10-15 20:24:25,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:25,570 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-10-15 20:24:25,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:25,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:25,578 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:25,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:25,779 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:25,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:25,780 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-10-15 20:24:25,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:25,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645074570] [2020-10-15 20:24:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:26,126 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:26,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645074570] [2020-10-15 20:24:26,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884869044] [2020-10-15 20:24:26,127 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:26,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:24:26,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:26,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:26,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:26,209 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:26,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:26,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:26,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188851926] [2020-10-15 20:24:26,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:26,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:26,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:26,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:26,227 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-10-15 20:24:27,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:27,242 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-10-15 20:24:27,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:24:27,242 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:27,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:27,243 INFO L225 Difference]: With dead ends: 134 [2020-10-15 20:24:27,243 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 20:24:27,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:24:27,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 20:24:27,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-10-15 20:24:27,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-15 20:24:27,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-10-15 20:24:27,248 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-10-15 20:24:27,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:27,248 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-10-15 20:24:27,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:27,248 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-10-15 20:24:27,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:27,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:27,249 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:27,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-10-15 20:24:27,452 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:27,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:27,452 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-10-15 20:24:27,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:27,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469785228] [2020-10-15 20:24:27,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:27,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469785228] [2020-10-15 20:24:27,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947761518] [2020-10-15 20:24:27,794 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:27,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:27,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:27,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:27,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:27,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22079761] [2020-10-15 20:24:27,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:27,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:27,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:27,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:27,861 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-10-15 20:24:28,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:28,799 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-10-15 20:24:28,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:24:28,800 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:28,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:28,800 INFO L225 Difference]: With dead ends: 135 [2020-10-15 20:24:28,800 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 20:24:28,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:24:28,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 20:24:28,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-10-15 20:24:28,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 20:24:28,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-10-15 20:24:28,802 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-10-15 20:24:28,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:28,803 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-10-15 20:24:28,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:28,803 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-10-15 20:24:28,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:28,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:28,803 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:29,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:29,004 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:29,004 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-10-15 20:24:29,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:29,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780575499] [2020-10-15 20:24:29,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:29,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780575499] [2020-10-15 20:24:29,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113576215] [2020-10-15 20:24:29,343 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:29,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:29,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:29,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:29,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:29,428 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:29,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:29,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:29,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397534830] [2020-10-15 20:24:29,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:29,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:29,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:29,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:29,447 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-10-15 20:24:30,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:30,550 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-10-15 20:24:30,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:24:30,551 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:30,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:30,551 INFO L225 Difference]: With dead ends: 132 [2020-10-15 20:24:30,551 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 20:24:30,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:24:30,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 20:24:30,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-10-15 20:24:30,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-15 20:24:30,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-10-15 20:24:30,554 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-10-15 20:24:30,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:30,554 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-10-15 20:24:30,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:30,554 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-10-15 20:24:30,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:30,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:30,555 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:30,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:30,755 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:30,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:30,756 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-10-15 20:24:30,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:30,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322571791] [2020-10-15 20:24:30,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:31,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322571791] [2020-10-15 20:24:31,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929379620] [2020-10-15 20:24:31,067 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:31,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:24:31,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:31,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:31,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:31,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:31,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:31,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855626083] [2020-10-15 20:24:31,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:31,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:31,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:31,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:31,153 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-10-15 20:24:32,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:32,150 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-10-15 20:24:32,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:24:32,151 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:32,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:32,151 INFO L225 Difference]: With dead ends: 133 [2020-10-15 20:24:32,151 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 20:24:32,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:24:32,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 20:24:32,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-15 20:24:32,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 20:24:32,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-15 20:24:32,154 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-10-15 20:24:32,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:32,154 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-15 20:24:32,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:32,154 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-15 20:24:32,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:32,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:32,155 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:32,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:32,361 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:32,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:32,362 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-10-15 20:24:32,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:32,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720669069] [2020-10-15 20:24:32,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:32,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720669069] [2020-10-15 20:24:32,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488045874] [2020-10-15 20:24:32,680 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:32,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:32,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:32,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:32,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:32,770 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:32,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:32,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:32,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481165365] [2020-10-15 20:24:32,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:32,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:32,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:32,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:32,790 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-10-15 20:24:33,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:33,997 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-10-15 20:24:33,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:24:33,998 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:33,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:33,998 INFO L225 Difference]: With dead ends: 130 [2020-10-15 20:24:33,998 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 20:24:33,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:24:33,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 20:24:34,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-15 20:24:34,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 20:24:34,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-15 20:24:34,001 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-10-15 20:24:34,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:34,001 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-15 20:24:34,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:34,001 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-15 20:24:34,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:34,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:34,002 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:34,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:34,203 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:34,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:34,203 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-10-15 20:24:34,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:34,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144095197] [2020-10-15 20:24:34,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:34,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144095197] [2020-10-15 20:24:34,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515463015] [2020-10-15 20:24:34,534 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:34,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:24:34,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:34,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:34,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:34,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:34,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:34,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083668508] [2020-10-15 20:24:34,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:34,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:34,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:34,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:34,624 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-10-15 20:24:35,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:35,703 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-15 20:24:35,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:24:35,705 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:35,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:35,705 INFO L225 Difference]: With dead ends: 131 [2020-10-15 20:24:35,706 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 20:24:35,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:24:35,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 20:24:35,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-15 20:24:35,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 20:24:35,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-10-15 20:24:35,708 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-10-15 20:24:35,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:35,708 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-10-15 20:24:35,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:35,709 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-10-15 20:24:35,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:35,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:35,709 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:35,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-15 20:24:35,910 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:35,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:35,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-10-15 20:24:35,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:35,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152603615] [2020-10-15 20:24:35,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:36,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152603615] [2020-10-15 20:24:36,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170400670] [2020-10-15 20:24:36,250 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:36,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:24:36,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:36,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:36,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:36,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:36,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:36,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:36,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935087173] [2020-10-15 20:24:36,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:36,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:36,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:36,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:36,354 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-10-15 20:24:37,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:37,683 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-10-15 20:24:37,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:24:37,684 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:37,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:37,685 INFO L225 Difference]: With dead ends: 128 [2020-10-15 20:24:37,685 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 20:24:37,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:24:37,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 20:24:37,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-15 20:24:37,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 20:24:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-15 20:24:37,688 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-10-15 20:24:37,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:37,688 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-15 20:24:37,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:37,688 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-15 20:24:37,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:37,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:37,689 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:37,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-10-15 20:24:37,889 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:37,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:37,890 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-10-15 20:24:37,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:37,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894808467] [2020-10-15 20:24:37,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:38,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894808467] [2020-10-15 20:24:38,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121498214] [2020-10-15 20:24:38,197 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:38,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:38,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:38,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:38,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:38,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944216221] [2020-10-15 20:24:38,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:38,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:38,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:38,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:38,270 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-10-15 20:24:39,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:39,449 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-10-15 20:24:39,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:24:39,451 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:39,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:39,451 INFO L225 Difference]: With dead ends: 129 [2020-10-15 20:24:39,451 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 20:24:39,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 20:24:39,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 20:24:39,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-10-15 20:24:39,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 20:24:39,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-15 20:24:39,453 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-10-15 20:24:39,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:39,453 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-15 20:24:39,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:39,453 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-15 20:24:39,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:39,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:39,454 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:39,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-15 20:24:39,654 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:39,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:39,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-10-15 20:24:39,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:39,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809934297] [2020-10-15 20:24:39,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:39,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809934297] [2020-10-15 20:24:39,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783112635] [2020-10-15 20:24:39,966 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:40,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:40,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:40,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:40,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:40,042 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:40,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:40,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:40,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712669961] [2020-10-15 20:24:40,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:40,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:40,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:40,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:40,064 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-10-15 20:24:41,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:41,513 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-10-15 20:24:41,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:24:41,514 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:41,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:41,515 INFO L225 Difference]: With dead ends: 126 [2020-10-15 20:24:41,515 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 20:24:41,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 20:24:41,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 20:24:41,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-15 20:24:41,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 20:24:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-15 20:24:41,517 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-10-15 20:24:41,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:41,518 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-15 20:24:41,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:41,518 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-15 20:24:41,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:41,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:41,518 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:41,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-15 20:24:41,719 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:41,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:41,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-10-15 20:24:41,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:41,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756822665] [2020-10-15 20:24:41,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:42,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756822665] [2020-10-15 20:24:42,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842325731] [2020-10-15 20:24:42,030 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:42,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:24:42,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:42,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:42,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:42,112 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:42,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:42,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:42,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226355091] [2020-10-15 20:24:42,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:42,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:42,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:42,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:42,114 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-10-15 20:24:43,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:43,363 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-10-15 20:24:43,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 20:24:43,364 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:43,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:43,364 INFO L225 Difference]: With dead ends: 127 [2020-10-15 20:24:43,364 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 20:24:43,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:24:43,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 20:24:43,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-10-15 20:24:43,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 20:24:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-15 20:24:43,367 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-10-15 20:24:43,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:43,368 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-15 20:24:43,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:43,368 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-15 20:24:43,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:43,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:43,368 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:43,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:43,569 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:43,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:43,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-10-15 20:24:43,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:43,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268979260] [2020-10-15 20:24:43,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:43,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268979260] [2020-10-15 20:24:43,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040661341] [2020-10-15 20:24:43,891 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:43,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:43,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:43,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:43,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:43,968 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:43,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:43,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:43,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778810868] [2020-10-15 20:24:43,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:43,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:43,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:43,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:43,992 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-15 20:24:45,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:45,579 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-10-15 20:24:45,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:24:45,580 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:45,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:45,581 INFO L225 Difference]: With dead ends: 124 [2020-10-15 20:24:45,581 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 20:24:45,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:24:45,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 20:24:45,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-15 20:24:45,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 20:24:45,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-15 20:24:45,583 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-10-15 20:24:45,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:45,583 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-15 20:24:45,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:45,583 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-15 20:24:45,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:45,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:45,583 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:45,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-15 20:24:45,784 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:45,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:45,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-10-15 20:24:45,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:45,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437603137] [2020-10-15 20:24:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:46,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437603137] [2020-10-15 20:24:46,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333794094] [2020-10-15 20:24:46,103 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:46,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:24:46,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:46,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:46,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:46,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:46,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-15 20:24:46,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959970193] [2020-10-15 20:24:46,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 20:24:46,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:46,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 20:24:46,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:24:46,184 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-10-15 20:24:47,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:47,519 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-10-15 20:24:47,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:24:47,520 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-15 20:24:47,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:47,520 INFO L225 Difference]: With dead ends: 144 [2020-10-15 20:24:47,521 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 20:24:47,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 20:24:47,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 20:24:47,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-10-15 20:24:47,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 20:24:47,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-10-15 20:24:47,524 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-10-15 20:24:47,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:47,524 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-10-15 20:24:47,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 20:24:47,525 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-10-15 20:24:47,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 20:24:47,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:47,525 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:47,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:47,734 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:47,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:47,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-10-15 20:24:47,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:47,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784337879] [2020-10-15 20:24:47,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:48,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784337879] [2020-10-15 20:24:48,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608698790] [2020-10-15 20:24:48,045 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:48,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:24:48,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:48,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-15 20:24:48,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:48,129 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:48,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:48,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-15 20:24:48,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027263621] [2020-10-15 20:24:48,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:48,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:48,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:48,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:48,161 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-10-15 20:24:49,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:49,789 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-10-15 20:24:49,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 20:24:49,790 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-15 20:24:49,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:49,791 INFO L225 Difference]: With dead ends: 125 [2020-10-15 20:24:49,791 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 20:24:49,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 20:24:49,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 20:24:49,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-15 20:24:49,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 20:24:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-15 20:24:49,793 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-15 20:24:49,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:49,793 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-15 20:24:49,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:49,793 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-15 20:24:49,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:24:49,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:49,794 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:49,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-10-15 20:24:49,994 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:49,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:49,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-10-15 20:24:49,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:49,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731444278] [2020-10-15 20:24:49,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:50,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731444278] [2020-10-15 20:24:50,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961160753] [2020-10-15 20:24:50,445 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:50,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:24:50,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:50,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:50,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:24:50,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553273167] [2020-10-15 20:24:50,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:50,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:50,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:50,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:50,509 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-10-15 20:24:51,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:51,230 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-10-15 20:24:51,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:24:51,231 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:24:51,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:51,232 INFO L225 Difference]: With dead ends: 144 [2020-10-15 20:24:51,232 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 20:24:51,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:24:51,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 20:24:51,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-10-15 20:24:51,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:24:51,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:24:51,235 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:24:51,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:51,235 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:24:51,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:51,235 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:24:51,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:24:51,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:51,235 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:51,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:51,436 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:51,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:51,436 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-10-15 20:24:51,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:51,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221536491] [2020-10-15 20:24:51,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:51,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221536491] [2020-10-15 20:24:51,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71492303] [2020-10-15 20:24:51,846 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:51,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:24:51,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:51,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:24:51,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:51,918 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:51,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:51,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:24:51,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040485248] [2020-10-15 20:24:51,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:24:51,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:51,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:24:51,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:24:51,931 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:24:52,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:52,776 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-10-15 20:24:52,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:24:52,777 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:24:52,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:52,778 INFO L225 Difference]: With dead ends: 141 [2020-10-15 20:24:52,778 INFO L226 Difference]: Without dead ends: 135 [2020-10-15 20:24:52,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 20:24:52,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-15 20:24:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-10-15 20:24:52,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:24:52,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:24:52,781 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:24:52,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:52,781 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:24:52,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:24:52,781 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:24:52,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:24:52,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:52,781 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:52,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-10-15 20:24:52,982 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:52,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:52,983 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-10-15 20:24:52,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:52,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319693923] [2020-10-15 20:24:52,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:53,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319693923] [2020-10-15 20:24:53,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573606770] [2020-10-15 20:24:53,416 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:53,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:24:53,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:53,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:24:53,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:53,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:53,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:24:53,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306974261] [2020-10-15 20:24:53,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:53,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:53,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:53,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:53,497 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:24:54,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:54,300 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-10-15 20:24:54,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 20:24:54,301 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:24:54,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:54,302 INFO L225 Difference]: With dead ends: 138 [2020-10-15 20:24:54,302 INFO L226 Difference]: Without dead ends: 132 [2020-10-15 20:24:54,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 20:24:54,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-15 20:24:54,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-10-15 20:24:54,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:24:54,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:24:54,304 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:24:54,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:54,304 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:24:54,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:54,304 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:24:54,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:24:54,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:54,305 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:54,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:54,505 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:54,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:54,506 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-10-15 20:24:54,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:54,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550596030] [2020-10-15 20:24:54,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:54,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550596030] [2020-10-15 20:24:54,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268308597] [2020-10-15 20:24:54,923 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:54,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:24:54,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:54,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:24:54,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:54,998 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:55,012 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:55,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:55,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:24:55,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280093835] [2020-10-15 20:24:55,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:24:55,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:55,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:24:55,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:24:55,013 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:24:56,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:56,002 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-10-15 20:24:56,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:24:56,003 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:24:56,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:56,003 INFO L225 Difference]: With dead ends: 137 [2020-10-15 20:24:56,009 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 20:24:56,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 20:24:56,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 20:24:56,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-10-15 20:24:56,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:24:56,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:24:56,011 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:24:56,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:56,011 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:24:56,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:24:56,011 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:24:56,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:24:56,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:56,011 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:56,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-10-15 20:24:56,212 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:56,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:56,212 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-10-15 20:24:56,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:56,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465363910] [2020-10-15 20:24:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:56,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465363910] [2020-10-15 20:24:56,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567540271] [2020-10-15 20:24:56,621 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:56,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:24:56,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:56,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:24:56,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:56,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:56,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:24:56,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501815064] [2020-10-15 20:24:56,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:24:56,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:56,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:24:56,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:24:56,701 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:24:57,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:57,637 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-15 20:24:57,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:24:57,638 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:24:57,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:57,638 INFO L225 Difference]: With dead ends: 134 [2020-10-15 20:24:57,639 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 20:24:57,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 20:24:57,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 20:24:57,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-10-15 20:24:57,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:24:57,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:24:57,641 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:24:57,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:57,642 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:24:57,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:24:57,642 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:24:57,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:24:57,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:57,642 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:57,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-15 20:24:57,849 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:57,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:57,850 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-10-15 20:24:57,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:57,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873653706] [2020-10-15 20:24:57,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:58,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873653706] [2020-10-15 20:24:58,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600231894] [2020-10-15 20:24:58,245 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:24:58,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:24:58,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:24:58,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:24:58,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:24:58,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:24:58,350 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:58,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:24:58,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:24:58,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001235870] [2020-10-15 20:24:58,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:24:58,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:24:58,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:24:58,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:24:58,351 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:24:59,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:24:59,386 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-10-15 20:24:59,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:24:59,388 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:24:59,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:24:59,388 INFO L225 Difference]: With dead ends: 133 [2020-10-15 20:24:59,388 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 20:24:59,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 20:24:59,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 20:24:59,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-10-15 20:24:59,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:24:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:24:59,391 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:24:59,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:24:59,391 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:24:59,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:24:59,391 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:24:59,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:24:59,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:24:59,392 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:24:59,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-15 20:24:59,596 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:24:59,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:24:59,596 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-10-15 20:24:59,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:24:59,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81384649] [2020-10-15 20:24:59,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:24:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:24:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:24:59,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81384649] [2020-10-15 20:24:59,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910977658] [2020-10-15 20:24:59,959 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:00,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:00,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:00,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:00,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:00,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348328165] [2020-10-15 20:25:00,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:00,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:00,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:00,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:00,027 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:01,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:01,016 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-10-15 20:25:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 20:25:01,018 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:01,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:01,018 INFO L225 Difference]: With dead ends: 130 [2020-10-15 20:25:01,018 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 20:25:01,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 20:25:01,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 20:25:01,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-10-15 20:25:01,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:01,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:01,022 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:01,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:01,022 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:01,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:01,022 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:01,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:01,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:01,022 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:01,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:01,225 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:01,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:01,226 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-10-15 20:25:01,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:01,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243391977] [2020-10-15 20:25:01,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:01,631 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:01,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243391977] [2020-10-15 20:25:01,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212727701] [2020-10-15 20:25:01,631 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:01,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:25:01,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:01,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:01,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:01,716 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:01,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:01,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:01,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400219986] [2020-10-15 20:25:01,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:01,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:01,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:01,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:01,734 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:02,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:02,940 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-10-15 20:25:02,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:25:02,941 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:02,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:02,941 INFO L225 Difference]: With dead ends: 129 [2020-10-15 20:25:02,941 INFO L226 Difference]: Without dead ends: 123 [2020-10-15 20:25:02,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 20:25:02,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-15 20:25:02,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-10-15 20:25:02,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:02,945 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:02,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:02,945 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:02,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:02,945 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:02,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:02,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:02,945 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:03,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-15 20:25:03,146 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:03,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:03,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-10-15 20:25:03,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:03,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418168326] [2020-10-15 20:25:03,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:03,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:03,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418168326] [2020-10-15 20:25:03,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923575769] [2020-10-15 20:25:03,516 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:03,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:25:03,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:03,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:03,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:03,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:03,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:03,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788816791] [2020-10-15 20:25:03,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:03,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:03,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:03,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:03,588 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:04,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:04,675 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-10-15 20:25:04,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 20:25:04,676 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:04,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:04,676 INFO L225 Difference]: With dead ends: 126 [2020-10-15 20:25:04,677 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 20:25:04,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 20:25:04,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 20:25:04,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-10-15 20:25:04,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:04,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:04,679 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:04,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:04,679 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:04,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:04,680 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:04,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:04,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:04,680 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:04,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:04,881 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:04,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:04,881 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-10-15 20:25:04,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:04,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774704203] [2020-10-15 20:25:04,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:05,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774704203] [2020-10-15 20:25:05,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137882427] [2020-10-15 20:25:05,250 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:05,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:25:05,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:05,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:05,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:05,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:05,352 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:05,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:05,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:05,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785910238] [2020-10-15 20:25:05,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:05,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:05,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:05,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:05,353 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:06,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:06,697 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-10-15 20:25:06,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:25:06,699 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:06,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:06,699 INFO L225 Difference]: With dead ends: 125 [2020-10-15 20:25:06,699 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 20:25:06,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 20:25:06,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 20:25:06,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-10-15 20:25:06,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:06,702 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:06,702 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:06,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:06,703 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:06,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:06,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:06,703 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:06,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-10-15 20:25:06,906 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:06,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:06,906 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-10-15 20:25:06,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:06,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842540735] [2020-10-15 20:25:06,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:07,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842540735] [2020-10-15 20:25:07,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142997407] [2020-10-15 20:25:07,248 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:07,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:25:07,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:07,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:07,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:07,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:07,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:07,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130509271] [2020-10-15 20:25:07,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:07,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:07,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:07,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:07,324 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:08,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:08,479 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-10-15 20:25:08,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 20:25:08,480 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:08,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:08,480 INFO L225 Difference]: With dead ends: 122 [2020-10-15 20:25:08,481 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 20:25:08,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 20:25:08,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 20:25:08,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-10-15 20:25:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:08,484 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:08,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:08,484 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:08,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:08,485 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:08,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:08,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:08,485 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:08,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:08,690 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:08,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:08,691 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-10-15 20:25:08,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:08,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415278044] [2020-10-15 20:25:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:09,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415278044] [2020-10-15 20:25:09,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166270204] [2020-10-15 20:25:09,044 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:09,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:25:09,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:09,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:09,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:09,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:09,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:09,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:09,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845031907] [2020-10-15 20:25:09,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:09,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:09,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:09,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:09,153 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:10,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:10,559 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-10-15 20:25:10,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 20:25:10,561 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:10,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:10,561 INFO L225 Difference]: With dead ends: 121 [2020-10-15 20:25:10,561 INFO L226 Difference]: Without dead ends: 115 [2020-10-15 20:25:10,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 20:25:10,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-15 20:25:10,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-10-15 20:25:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:10,564 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:10,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:10,564 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:10,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:10,564 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:10,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:10,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:10,564 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:10,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-10-15 20:25:10,765 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:10,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:10,766 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-10-15 20:25:10,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:10,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312595258] [2020-10-15 20:25:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:11,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312595258] [2020-10-15 20:25:11,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734942081] [2020-10-15 20:25:11,108 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:11,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:11,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:11,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:11,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:11,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241536229] [2020-10-15 20:25:11,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:11,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:11,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:11,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:11,179 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:12,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:12,383 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-10-15 20:25:12,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 20:25:12,384 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:12,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:12,384 INFO L225 Difference]: With dead ends: 118 [2020-10-15 20:25:12,384 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 20:25:12,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 20:25:12,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 20:25:12,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-10-15 20:25:12,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:12,387 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:12,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:12,387 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:12,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:12,387 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:12,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:12,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:12,388 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:12,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:12,588 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:12,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:12,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-10-15 20:25:12,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:12,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217639772] [2020-10-15 20:25:12,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:12,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217639772] [2020-10-15 20:25:12,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157176882] [2020-10-15 20:25:12,937 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:12,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:25:12,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:12,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:12,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:13,016 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:13,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:13,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:13,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144100377] [2020-10-15 20:25:13,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:13,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:13,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:13,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:13,040 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:14,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:14,573 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-10-15 20:25:14,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 20:25:14,574 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:14,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:14,575 INFO L225 Difference]: With dead ends: 117 [2020-10-15 20:25:14,575 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 20:25:14,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 20:25:14,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 20:25:14,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-10-15 20:25:14,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:14,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:14,578 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:14,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:14,578 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:14,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:14,578 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:14,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:14,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:14,578 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:14,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:14,779 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:14,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:14,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-10-15 20:25:14,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:14,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566657152] [2020-10-15 20:25:14,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:15,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566657152] [2020-10-15 20:25:15,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966994020] [2020-10-15 20:25:15,121 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:15,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:25:15,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:15,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:15,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:15,203 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:15,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:15,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:15,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893878806] [2020-10-15 20:25:15,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:15,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:15,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:15,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:15,204 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:16,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:16,514 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-10-15 20:25:16,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 20:25:16,515 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:16,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:16,516 INFO L225 Difference]: With dead ends: 114 [2020-10-15 20:25:16,516 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 20:25:16,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 20:25:16,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 20:25:16,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-10-15 20:25:16,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:16,519 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:16,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:16,519 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:16,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:16,519 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:16,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:16,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:16,519 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:16,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-15 20:25:16,720 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:16,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:16,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-10-15 20:25:16,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:16,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786982205] [2020-10-15 20:25:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:17,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786982205] [2020-10-15 20:25:17,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090509259] [2020-10-15 20:25:17,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:17,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:25:17,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:17,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:17,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:17,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:17,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:17,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:17,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139061452] [2020-10-15 20:25:17,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:17,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:17,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:17,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:17,167 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:18,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:18,856 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-15 20:25:18,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 20:25:18,857 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:18,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:18,858 INFO L225 Difference]: With dead ends: 113 [2020-10-15 20:25:18,858 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 20:25:18,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 20:25:18,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 20:25:18,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-10-15 20:25:18,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:18,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:18,861 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:18,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:18,861 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:18,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:18,861 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:18,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:18,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:18,861 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:19,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-15 20:25:19,062 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:19,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:19,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-10-15 20:25:19,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:19,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572572312] [2020-10-15 20:25:19,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:19,421 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:19,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572572312] [2020-10-15 20:25:19,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508105882] [2020-10-15 20:25:19,422 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:19,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-15 20:25:19,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:19,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:19,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:19,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:19,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:19,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716622909] [2020-10-15 20:25:19,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:19,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:19,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:19,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:19,515 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:21,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:21,012 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-10-15 20:25:21,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 20:25:21,014 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:21,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:21,014 INFO L225 Difference]: With dead ends: 110 [2020-10-15 20:25:21,014 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 20:25:21,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 20:25:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 20:25:21,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-10-15 20:25:21,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 20:25:21,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-15 20:25:21,017 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-15 20:25:21,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:21,017 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-15 20:25:21,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:21,017 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-15 20:25:21,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:21,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:21,018 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:21,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-15 20:25:21,218 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:21,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:21,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-10-15 20:25:21,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:21,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770702775] [2020-10-15 20:25:21,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:21,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770702775] [2020-10-15 20:25:21,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371279045] [2020-10-15 20:25:21,563 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:21,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-15 20:25:21,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:21,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:21,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:21,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:25:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:21,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:21,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:21,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447928930] [2020-10-15 20:25:21,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:21,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:21,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:21,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:21,679 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-15 20:25:23,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:23,454 INFO L93 Difference]: Finished difference Result 109 states and 269 transitions. [2020-10-15 20:25:23,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 20:25:23,461 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:23,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:23,461 INFO L225 Difference]: With dead ends: 109 [2020-10-15 20:25:23,461 INFO L226 Difference]: Without dead ends: 103 [2020-10-15 20:25:23,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1197, Invalid=2835, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 20:25:23,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-15 20:25:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-10-15 20:25:23,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 20:25:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-15 20:25:23,463 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-15 20:25:23,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:23,463 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-15 20:25:23,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:23,463 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-15 20:25:23,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:23,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:23,463 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:23,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-15 20:25:23,664 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:23,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:23,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 235 times [2020-10-15 20:25:23,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:23,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534373647] [2020-10-15 20:25:23,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:24,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534373647] [2020-10-15 20:25:24,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73538272] [2020-10-15 20:25:24,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:24,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:24,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:24,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:24,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-15 20:25:24,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225305762] [2020-10-15 20:25:24,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 20:25:24,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:24,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 20:25:24,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-15 20:25:24,104 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-15 20:25:25,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:25,630 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-10-15 20:25:25,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:25:25,631 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-15 20:25:25,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:25,632 INFO L225 Difference]: With dead ends: 125 [2020-10-15 20:25:25,632 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 20:25:25,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1224, Invalid=2682, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 20:25:25,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 20:25:25,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-10-15 20:25:25,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 20:25:25,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 249 transitions. [2020-10-15 20:25:25,634 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 249 transitions. Word has length 28 [2020-10-15 20:25:25,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:25,635 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 249 transitions. [2020-10-15 20:25:25,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 20:25:25,635 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 249 transitions. [2020-10-15 20:25:25,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:25,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:25,635 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:25,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-15 20:25:25,836 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:25,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:25,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1583925840, now seen corresponding path program 236 times [2020-10-15 20:25:25,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:25,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960090913] [2020-10-15 20:25:25,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:26,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960090913] [2020-10-15 20:25:26,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554357526] [2020-10-15 20:25:26,179 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:26,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:25:26,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:26,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-15 20:25:26,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:26,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:26,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:26,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095612758] [2020-10-15 20:25:26,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:26,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:26,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:26,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:26,296 INFO L87 Difference]: Start difference. First operand 96 states and 249 transitions. Second operand 25 states. [2020-10-15 20:25:27,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:27,948 INFO L93 Difference]: Finished difference Result 104 states and 261 transitions. [2020-10-15 20:25:27,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 20:25:27,949 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:27,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:27,949 INFO L225 Difference]: With dead ends: 104 [2020-10-15 20:25:27,949 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 20:25:27,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1121, Invalid=2911, Unknown=0, NotChecked=0, Total=4032 [2020-10-15 20:25:27,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 20:25:27,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 69. [2020-10-15 20:25:27,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 20:25:27,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 168 transitions. [2020-10-15 20:25:27,952 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 168 transitions. Word has length 28 [2020-10-15 20:25:27,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:27,952 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 168 transitions. [2020-10-15 20:25:27,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:27,952 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 168 transitions. [2020-10-15 20:25:27,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 20:25:27,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:27,952 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:28,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:28,153 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:28,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:28,154 INFO L82 PathProgramCache]: Analyzing trace with hash 234390510, now seen corresponding path program 237 times [2020-10-15 20:25:28,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:28,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288743962] [2020-10-15 20:25:28,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:28,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288743962] [2020-10-15 20:25:28,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451560966] [2020-10-15 20:25:28,484 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:28,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-15 20:25:28,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:28,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-15 20:25:28,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:28,574 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:25:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:28,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:25:28,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 20:25:28,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195755794] [2020-10-15 20:25:28,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 20:25:28,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:28,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 20:25:28,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:25:28,605 INFO L87 Difference]: Start difference. First operand 69 states and 168 transitions. Second operand 25 states. [2020-10-15 20:25:30,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:30,328 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-10-15 20:25:30,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 20:25:30,330 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-15 20:25:30,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:30,330 INFO L225 Difference]: With dead ends: 124 [2020-10-15 20:25:30,330 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 20:25:30,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 20:25:30,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 20:25:30,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-10-15 20:25:30,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 20:25:30,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-10-15 20:25:30,333 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-10-15 20:25:30,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:30,333 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-10-15 20:25:30,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 20:25:30,334 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-10-15 20:25:30,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:25:30,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:30,334 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:30,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-15 20:25:30,535 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:30,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:30,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 238 times [2020-10-15 20:25:30,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:30,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412396063] [2020-10-15 20:25:30,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 72 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:30,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412396063] [2020-10-15 20:25:30,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268456960] [2020-10-15 20:25:30,687 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:30,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:25:30,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:30,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:25:30,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:30,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-15 20:25:30,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2020-10-15 20:25:30,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36809251] [2020-10-15 20:25:30,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:25:30,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:30,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:25:30,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:25:30,766 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 13 states. [2020-10-15 20:25:30,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:30,804 INFO L93 Difference]: Finished difference Result 421 states and 1013 transitions. [2020-10-15 20:25:30,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:25:30,804 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-15 20:25:30,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:30,805 INFO L225 Difference]: With dead ends: 421 [2020-10-15 20:25:30,805 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 20:25:30,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-10-15 20:25:30,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 20:25:30,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-15 20:25:30,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 20:25:30,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 140 transitions. [2020-10-15 20:25:30,807 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 140 transitions. Word has length 29 [2020-10-15 20:25:30,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:30,807 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 140 transitions. [2020-10-15 20:25:30,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:25:30,807 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 140 transitions. [2020-10-15 20:25:30,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 20:25:30,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:25:30,808 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:25:31,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:31,009 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:25:31,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:25:31,009 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 239 times [2020-10-15 20:25:31,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:25:31,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405613469] [2020-10-15 20:25:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:25:31,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:25:31,617 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:31,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405613469] [2020-10-15 20:25:31,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433031366] [2020-10-15 20:25:31,617 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:31,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 20:25:31,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:25:31,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:25:31,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:25:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:25:32,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-15 20:25:32,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [23] total 36 [2020-10-15 20:25:32,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304223130] [2020-10-15 20:25:32,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 20:25:32,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:25:32,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 20:25:32,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:25:32,078 INFO L87 Difference]: Start difference. First operand 70 states and 140 transitions. Second operand 13 states. [2020-10-15 20:25:32,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:25:32,124 INFO L93 Difference]: Finished difference Result 256 states and 475 transitions. [2020-10-15 20:25:32,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:25:32,125 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-15 20:25:32,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:25:32,126 INFO L225 Difference]: With dead ends: 256 [2020-10-15 20:25:32,126 INFO L226 Difference]: Without dead ends: 0 [2020-10-15 20:25:32,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:25:32,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-15 20:25:32,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-15 20:25:32,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-15 20:25:32,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-15 20:25:32,127 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-10-15 20:25:32,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:25:32,127 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-15 20:25:32,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 20:25:32,127 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-15 20:25:32,127 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-15 20:25:32,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:25:32,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:25:32 BasicIcfg [2020-10-15 20:25:32,338 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 20:25:32,341 INFO L168 Benchmark]: Toolchain (without parser) took 272877.35 ms. Allocated memory was 256.9 MB in the beginning and 300.9 MB in the end (delta: 44.0 MB). Free memory was 212.0 MB in the beginning and 165.3 MB in the end (delta: 46.7 MB). Peak memory consumption was 90.7 MB. Max. memory is 14.2 GB. [2020-10-15 20:25:32,341 INFO L168 Benchmark]: CDTParser took 0.43 ms. Allocated memory is still 256.9 MB. Free memory was 235.0 MB in the beginning and 234.1 MB in the end (delta: 839.0 kB). Peak memory consumption was 839.0 kB. Max. memory is 14.2 GB. [2020-10-15 20:25:32,341 INFO L168 Benchmark]: CACSL2BoogieTranslator took 850.44 ms. Allocated memory was 256.9 MB in the beginning and 333.4 MB in the end (delta: 76.5 MB). Free memory was 212.0 MB in the beginning and 284.9 MB in the end (delta: -72.9 MB). Peak memory consumption was 26.8 MB. Max. memory is 14.2 GB. [2020-10-15 20:25:32,342 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.17 ms. Allocated memory is still 333.4 MB. Free memory was 284.9 MB in the beginning and 283.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. [2020-10-15 20:25:32,342 INFO L168 Benchmark]: Boogie Preprocessor took 26.17 ms. Allocated memory is still 333.4 MB. Free memory was 283.2 MB in the beginning and 281.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. [2020-10-15 20:25:32,343 INFO L168 Benchmark]: RCFGBuilder took 358.63 ms. Allocated memory is still 333.4 MB. Free memory was 281.6 MB in the beginning and 260.6 MB in the end (delta: 20.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 14.2 GB. [2020-10-15 20:25:32,343 INFO L168 Benchmark]: TraceAbstraction took 271593.25 ms. Allocated memory was 333.4 MB in the beginning and 300.9 MB in the end (delta: -32.5 MB). Free memory was 259.8 MB in the beginning and 165.3 MB in the end (delta: 94.5 MB). Peak memory consumption was 62.0 MB. Max. memory is 14.2 GB. [2020-10-15 20:25:32,345 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 ms. Allocated memory is still 256.9 MB. Free memory was 235.0 MB in the beginning and 234.1 MB in the end (delta: 839.0 kB). Peak memory consumption was 839.0 kB. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 850.44 ms. Allocated memory was 256.9 MB in the beginning and 333.4 MB in the end (delta: 76.5 MB). Free memory was 212.0 MB in the beginning and 284.9 MB in the end (delta: -72.9 MB). Peak memory consumption was 26.8 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 43.17 ms. Allocated memory is still 333.4 MB. Free memory was 284.9 MB in the beginning and 283.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 26.17 ms. Allocated memory is still 333.4 MB. Free memory was 283.2 MB in the beginning and 281.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. * RCFGBuilder took 358.63 ms. Allocated memory is still 333.4 MB. Free memory was 281.6 MB in the beginning and 260.6 MB in the end (delta: 20.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 14.2 GB. * TraceAbstraction took 271593.25 ms. Allocated memory was 333.4 MB in the beginning and 300.9 MB in the end (delta: -32.5 MB). Free memory was 259.8 MB in the beginning and 165.3 MB in the end (delta: 94.5 MB). Peak memory consumption was 62.0 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 618 VarBasedMoverChecksPositive, 16 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.3s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 271.4s, OverallIterations: 241, TraceHistogramMax: 11, AutomataDifference: 154.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 3935 SDtfs, 13973 SDslu, 25157 SDs, 0 SdLazy, 27289 SolverSat, 16264 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13658 GetRequests, 4494 SyntacticMatches, 234 SemanticMatches, 8930 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91491 ImplicationChecksByTransitivity, 160.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=237, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 241 MinimizatonAttempts, 6070 StatesRemovedByMinimization, 238 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 5.2s SatisfiabilityAnalysisTime, 52.4s InterpolantComputationTime, 10246 NumberOfCodeBlocks, 10244 NumberOfCodeBlocksAsserted, 1270 NumberOfCheckSat, 9769 ConstructedInterpolants, 0 QuantifiedInterpolants, 956995 SizeOfPredicates, 3171 NumberOfNonLiveVariables, 31166 ConjunctsInSsa, 4133 ConjunctsInUnsatCore, 477 InterpolantComputations, 7 PerfectInterpolantSequences, 272/21430 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 correct! Received shutdown request...