/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 18:46:19,121 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 18:46:19,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 18:46:19,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 18:46:19,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 18:46:19,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 18:46:19,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 18:46:19,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 18:46:19,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 18:46:19,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 18:46:19,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 18:46:19,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 18:46:19,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 18:46:19,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 18:46:19,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 18:46:19,173 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 18:46:19,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 18:46:19,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 18:46:19,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 18:46:19,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 18:46:19,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 18:46:19,191 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 18:46:19,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 18:46:19,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 18:46:19,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 18:46:19,195 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 18:46:19,195 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 18:46:19,196 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 18:46:19,196 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 18:46:19,197 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 18:46:19,197 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 18:46:19,198 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 18:46:19,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 18:46:19,199 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 18:46:19,200 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 18:46:19,200 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 18:46:19,201 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 18:46:19,201 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 18:46:19,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 18:46:19,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 18:46:19,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 18:46:19,204 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 [2020-04-17 18:46:19,228 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 18:46:19,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 18:46:19,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 18:46:19,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 18:46:19,231 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 18:46:19,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 18:46:19,231 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 18:46:19,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 18:46:19,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 18:46:19,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 18:46:19,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 18:46:19,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 18:46:19,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 18:46:19,234 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 18:46:19,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 18:46:19,234 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 18:46:19,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 18:46:19,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 18:46:19,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 18:46:19,235 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 18:46:19,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 18:46:19,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 18:46:19,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 18:46:19,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 18:46:19,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 18:46:19,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 18:46:19,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 18:46:19,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 18:46:19,237 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 18:46:19,500 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 18:46:19,518 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 18:46:19,523 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 18:46:19,524 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 18:46:19,524 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 18:46:19,525 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-04-17 18:46:19,598 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65db80b0e/bc79a4f1f1b04737b67796d3e03d8eb8/FLAG23e2f9a17 [2020-04-17 18:46:20,184 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 18:46:20,185 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2020-04-17 18:46:20,200 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65db80b0e/bc79a4f1f1b04737b67796d3e03d8eb8/FLAG23e2f9a17 [2020-04-17 18:46:20,519 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65db80b0e/bc79a4f1f1b04737b67796d3e03d8eb8 [2020-04-17 18:46:20,527 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 18:46:20,550 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 18:46:20,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 18:46:20,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 18:46:20,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 18:46:20,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:46:20" (1/1) ... [2020-04-17 18:46:20,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70f06879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:20, skipping insertion in model container [2020-04-17 18:46:20,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:46:20" (1/1) ... [2020-04-17 18:46:20,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 18:46:20,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 18:46:21,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 18:46:21,119 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 18:46:21,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 18:46:21,267 INFO L208 MainTranslator]: Completed translation [2020-04-17 18:46:21,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:21 WrapperNode [2020-04-17 18:46:21,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 18:46:21,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 18:46:21,269 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 18:46:21,269 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 18:46:21,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:21" (1/1) ... [2020-04-17 18:46:21,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:21" (1/1) ... [2020-04-17 18:46:21,317 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 18:46:21,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 18:46:21,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 18:46:21,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 18:46:21,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:21" (1/1) ... [2020-04-17 18:46:21,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:21" (1/1) ... [2020-04-17 18:46:21,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:21" (1/1) ... [2020-04-17 18:46:21,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:21" (1/1) ... [2020-04-17 18:46:21,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:21" (1/1) ... [2020-04-17 18:46:21,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:21" (1/1) ... [2020-04-17 18:46:21,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:21" (1/1) ... [2020-04-17 18:46:21,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 18:46:21,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 18:46:21,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 18:46:21,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 18:46:21,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:21" (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 [2020-04-17 18:46:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-17 18:46:21,402 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-17 18:46:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-17 18:46:21,402 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-17 18:46:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 18:46:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-17 18:46:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 18:46:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 18:46:21,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-17 18:46:21,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 18:46:21,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 18:46:21,405 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-17 18:46:21,759 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 18:46:21,760 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-17 18:46:21,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:46:21 BoogieIcfgContainer [2020-04-17 18:46:21,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 18:46:21,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 18:46:21,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 18:46:21,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 18:46:21,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 06:46:20" (1/3) ... [2020-04-17 18:46:21,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a343541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:46:21, skipping insertion in model container [2020-04-17 18:46:21,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:21" (2/3) ... [2020-04-17 18:46:21,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a343541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:46:21, skipping insertion in model container [2020-04-17 18:46:21,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:46:21" (3/3) ... [2020-04-17 18:46:21,773 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-04-17 18:46:21,784 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 18:46:21,784 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 18:46:21,791 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 18:46:21,792 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 18:46:21,815 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,816 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,816 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,816 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,817 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,817 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,818 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,818 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,818 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,819 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,819 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,819 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,819 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,820 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,820 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,820 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,821 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,821 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,821 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,822 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,822 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,822 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,822 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,823 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,823 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,824 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,824 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,824 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,828 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,828 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,829 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,829 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,829 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,829 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,835 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,835 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,836 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,836 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,836 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,836 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:46:21,853 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-17 18:46:21,870 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:46:21,870 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:46:21,870 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:46:21,870 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:46:21,871 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:46:21,871 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:46:21,871 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:46:21,871 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:46:21,885 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-04-17 18:46:21,886 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-04-17 18:46:21,938 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-04-17 18:46:21,941 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 18:46:21,947 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. [2020-04-17 18:46:21,950 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-04-17 18:46:21,970 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-04-17 18:46:21,971 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 18:46:21,972 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. [2020-04-17 18:46:21,974 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-04-17 18:46:21,975 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:46:23,174 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-04-17 18:46:23,440 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-04-17 18:46:23,441 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-04-17 18:46:23,444 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-04-17 18:46:23,453 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-17 18:46:23,455 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-17 18:46:23,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-17 18:46:23,461 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:23,461 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-17 18:46:23,462 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:23,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:23,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-04-17 18:46:23,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:23,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511992886] [2020-04-17 18:46:23,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:23,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:23,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511992886] [2020-04-17 18:46:23,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:46:23,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 18:46:23,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651060102] [2020-04-17 18:46:23,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 18:46:23,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:23,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 18:46:23,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:46:23,727 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-17 18:46:23,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:23,833 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-04-17 18:46:23,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 18:46:23,835 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-17 18:46:23,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:23,852 INFO L225 Difference]: With dead ends: 75 [2020-04-17 18:46:23,853 INFO L226 Difference]: Without dead ends: 42 [2020-04-17 18:46:23,854 INFO L678 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 [2020-04-17 18:46:23,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-04-17 18:46:23,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-04-17 18:46:23,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 18:46:23,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-04-17 18:46:23,892 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-04-17 18:46:23,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:23,892 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-04-17 18:46:23,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 18:46:23,893 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-04-17 18:46:23,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 18:46:23,893 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:23,894 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:23,894 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:23,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:23,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-04-17 18:46:23,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:23,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281901567] [2020-04-17 18:46:23,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:24,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281901567] [2020-04-17 18:46:24,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:46:24,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:46:24,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155529403] [2020-04-17 18:46:24,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 18:46:24,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:24,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 18:46:24,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 18:46:24,039 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-04-17 18:46:24,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:24,072 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-04-17 18:46:24,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 18:46:24,072 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 18:46:24,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:24,074 INFO L225 Difference]: With dead ends: 56 [2020-04-17 18:46:24,074 INFO L226 Difference]: Without dead ends: 50 [2020-04-17 18:46:24,075 INFO L678 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 [2020-04-17 18:46:24,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-04-17 18:46:24,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-04-17 18:46:24,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 18:46:24,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-04-17 18:46:24,083 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-04-17 18:46:24,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:24,084 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-04-17 18:46:24,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 18:46:24,084 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-04-17 18:46:24,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:46:24,085 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:24,085 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:24,085 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:24,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:24,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-04-17 18:46:24,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:24,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371515633] [2020-04-17 18:46:24,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:24,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371515633] [2020-04-17 18:46:24,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:46:24,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:46:24,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157030769] [2020-04-17 18:46:24,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:46:24,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:24,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:46:24,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:46:24,196 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-04-17 18:46:24,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:24,288 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-04-17 18:46:24,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:46:24,288 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:46:24,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:24,290 INFO L225 Difference]: With dead ends: 78 [2020-04-17 18:46:24,290 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 18:46:24,291 INFO L678 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 [2020-04-17 18:46:24,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 18:46:24,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-04-17 18:46:24,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 18:46:24,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 18:46:24,299 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-04-17 18:46:24,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:24,300 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 18:46:24,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:46:24,300 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 18:46:24,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:46:24,301 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:24,301 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:24,301 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:24,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:24,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-04-17 18:46:24,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:24,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864682558] [2020-04-17 18:46:24,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:24,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:24,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864682558] [2020-04-17 18:46:24,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:46:24,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:46:24,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092912697] [2020-04-17 18:46:24,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:46:24,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:24,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:46:24,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:46:24,358 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-04-17 18:46:24,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:24,437 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-04-17 18:46:24,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:46:24,439 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:46:24,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:24,440 INFO L225 Difference]: With dead ends: 54 [2020-04-17 18:46:24,440 INFO L226 Difference]: Without dead ends: 43 [2020-04-17 18:46:24,440 INFO L678 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 [2020-04-17 18:46:24,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-04-17 18:46:24,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-04-17 18:46:24,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-04-17 18:46:24,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-04-17 18:46:24,446 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-04-17 18:46:24,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:24,447 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-04-17 18:46:24,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:46:24,447 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-04-17 18:46:24,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:46:24,448 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:24,448 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:24,448 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:24,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:24,449 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-04-17 18:46:24,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:24,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349771798] [2020-04-17 18:46:24,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:24,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349771798] [2020-04-17 18:46:24,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:46:24,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 18:46:24,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059427079] [2020-04-17 18:46:24,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 18:46:24,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:24,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 18:46:24,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-04-17 18:46:24,529 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-04-17 18:46:24,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:24,605 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-04-17 18:46:24,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:46:24,606 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 18:46:24,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:24,607 INFO L225 Difference]: With dead ends: 57 [2020-04-17 18:46:24,607 INFO L226 Difference]: Without dead ends: 51 [2020-04-17 18:46:24,608 INFO L678 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 [2020-04-17 18:46:24,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-04-17 18:46:24,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-04-17 18:46:24,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-04-17 18:46:24,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-04-17 18:46:24,613 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-04-17 18:46:24,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:24,613 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-04-17 18:46:24,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 18:46:24,614 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-04-17 18:46:24,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:46:24,614 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:24,615 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:24,615 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:24,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:24,615 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-04-17 18:46:24,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:24,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746168322] [2020-04-17 18:46:24,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:24,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746168322] [2020-04-17 18:46:24,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63720897] [2020-04-17 18:46:24,674 INFO L92 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 [2020-04-17 18:46:24,753 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:24,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:24,755 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:46:24,761 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:24,791 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:24,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:24,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 18:46:24,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131054027] [2020-04-17 18:46:24,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 18:46:24,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:24,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 18:46:24,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-04-17 18:46:24,818 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-04-17 18:46:24,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:24,928 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-04-17 18:46:24,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:46:24,929 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 18:46:24,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:24,930 INFO L225 Difference]: With dead ends: 48 [2020-04-17 18:46:24,930 INFO L226 Difference]: Without dead ends: 43 [2020-04-17 18:46:24,931 INFO L678 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 [2020-04-17 18:46:24,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-04-17 18:46:24,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-04-17 18:46:24,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-04-17 18:46:24,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-04-17 18:46:24,940 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-04-17 18:46:24,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:24,942 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-04-17 18:46:24,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 18:46:24,942 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-04-17 18:46:24,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:46:24,943 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:24,943 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:25,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:25,145 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:25,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:25,145 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-04-17 18:46:25,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:25,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3552899] [2020-04-17 18:46:25,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:25,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:25,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3552899] [2020-04-17 18:46:25,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638336358] [2020-04-17 18:46:25,215 INFO L92 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 [2020-04-17 18:46:25,268 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:25,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:25,270 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:46:25,273 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:25,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:25,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:25,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-04-17 18:46:25,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91035068] [2020-04-17 18:46:25,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 18:46:25,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:25,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 18:46:25,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 18:46:25,302 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-04-17 18:46:25,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:25,409 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-04-17 18:46:25,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:46:25,410 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-04-17 18:46:25,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:25,410 INFO L225 Difference]: With dead ends: 54 [2020-04-17 18:46:25,411 INFO L226 Difference]: Without dead ends: 48 [2020-04-17 18:46:25,411 INFO L678 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 [2020-04-17 18:46:25,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-04-17 18:46:25,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-04-17 18:46:25,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 18:46:25,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-04-17 18:46:25,423 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-04-17 18:46:25,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:25,423 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-04-17 18:46:25,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 18:46:25,423 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-04-17 18:46:25,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:46:25,424 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:25,424 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:25,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:25,636 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:25,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:25,636 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-04-17 18:46:25,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:25,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918691790] [2020-04-17 18:46:25,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:25,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918691790] [2020-04-17 18:46:25,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951116859] [2020-04-17 18:46:25,708 INFO L92 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 [2020-04-17 18:46:25,754 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:46:25,755 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:25,755 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:46:25,756 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:25,778 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:25,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:25,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 18:46:25,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762513772] [2020-04-17 18:46:25,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 18:46:25,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:25,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 18:46:25,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-04-17 18:46:25,793 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-04-17 18:46:25,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:25,907 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-04-17 18:46:25,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:46:25,907 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 18:46:25,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:25,908 INFO L225 Difference]: With dead ends: 58 [2020-04-17 18:46:25,908 INFO L226 Difference]: Without dead ends: 52 [2020-04-17 18:46:25,909 INFO L678 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 [2020-04-17 18:46:25,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-04-17 18:46:25,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-04-17 18:46:25,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-04-17 18:46:25,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-04-17 18:46:25,914 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-04-17 18:46:25,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:25,914 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-04-17 18:46:25,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 18:46:25,915 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-04-17 18:46:25,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:46:25,915 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:25,916 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:26,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:26,126 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:26,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:26,127 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-04-17 18:46:26,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:26,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026526979] [2020-04-17 18:46:26,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:26,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026526979] [2020-04-17 18:46:26,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329913729] [2020-04-17 18:46:26,202 INFO L92 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 [2020-04-17 18:46:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:26,255 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:46:26,256 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:26,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:26,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-04-17 18:46:26,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383300475] [2020-04-17 18:46:26,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 18:46:26,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:26,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 18:46:26,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-04-17 18:46:26,274 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-04-17 18:46:26,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:26,426 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-04-17 18:46:26,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:46:26,426 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-04-17 18:46:26,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:26,427 INFO L225 Difference]: With dead ends: 78 [2020-04-17 18:46:26,427 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 18:46:26,428 INFO L678 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 [2020-04-17 18:46:26,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 18:46:26,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-04-17 18:46:26,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 18:46:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-04-17 18:46:26,434 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-04-17 18:46:26,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:26,434 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-04-17 18:46:26,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 18:46:26,435 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-04-17 18:46:26,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 18:46:26,435 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:26,435 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:26,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:26,640 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:26,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:26,640 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-04-17 18:46:26,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:26,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445029600] [2020-04-17 18:46:26,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:26,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445029600] [2020-04-17 18:46:26,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820603810] [2020-04-17 18:46:26,699 INFO L92 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 [2020-04-17 18:46:26,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:26,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:26,748 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:46:26,752 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:26,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:26,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 18:46:26,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096639446] [2020-04-17 18:46:26,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 18:46:26,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:26,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 18:46:26,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-04-17 18:46:26,778 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-04-17 18:46:26,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:26,968 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-04-17 18:46:26,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:46:26,968 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 18:46:26,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:26,969 INFO L225 Difference]: With dead ends: 62 [2020-04-17 18:46:26,969 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 18:46:26,969 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:46:26,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 18:46:26,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-04-17 18:46:26,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-04-17 18:46:26,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-04-17 18:46:26,973 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-04-17 18:46:26,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:26,974 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-04-17 18:46:26,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 18:46:26,974 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-04-17 18:46:26,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:46:26,975 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:26,975 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:27,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:27,176 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:27,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:27,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-04-17 18:46:27,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:27,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199835430] [2020-04-17 18:46:27,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:27,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199835430] [2020-04-17 18:46:27,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455767162] [2020-04-17 18:46:27,275 INFO L92 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 [2020-04-17 18:46:27,330 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 18:46:27,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:27,332 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:46:27,334 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:27,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:27,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-17 18:46:27,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678728621] [2020-04-17 18:46:27,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 18:46:27,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:27,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 18:46:27,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-04-17 18:46:27,348 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-04-17 18:46:27,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:27,444 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-04-17 18:46:27,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:46:27,445 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-04-17 18:46:27,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:27,445 INFO L225 Difference]: With dead ends: 64 [2020-04-17 18:46:27,446 INFO L226 Difference]: Without dead ends: 58 [2020-04-17 18:46:27,447 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:27,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-04-17 18:46:27,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-04-17 18:46:27,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-04-17 18:46:27,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-04-17 18:46:27,453 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-04-17 18:46:27,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:27,454 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-04-17 18:46:27,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 18:46:27,457 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-04-17 18:46:27,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:46:27,458 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:27,458 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:27,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:27,660 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:27,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:27,660 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-04-17 18:46:27,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:27,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723372377] [2020-04-17 18:46:27,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:27,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723372377] [2020-04-17 18:46:27,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441043379] [2020-04-17 18:46:27,748 INFO L92 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 [2020-04-17 18:46:27,792 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:27,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:27,793 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:46:27,794 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:27,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:27,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:27,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 18:46:27,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428340311] [2020-04-17 18:46:27,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:46:27,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:27,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:46:27,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:27,831 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-04-17 18:46:28,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:28,011 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-04-17 18:46:28,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:46:28,012 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 18:46:28,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:28,013 INFO L225 Difference]: With dead ends: 61 [2020-04-17 18:46:28,013 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 18:46:28,014 INFO L678 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 [2020-04-17 18:46:28,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 18:46:28,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-04-17 18:46:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-04-17 18:46:28,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-04-17 18:46:28,018 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-04-17 18:46:28,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:28,018 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-04-17 18:46:28,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:46:28,019 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-04-17 18:46:28,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:46:28,019 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:28,020 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:28,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:28,229 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:28,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:28,230 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-04-17 18:46:28,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:28,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564769768] [2020-04-17 18:46:28,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:28,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:28,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564769768] [2020-04-17 18:46:28,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060906800] [2020-04-17 18:46:28,313 INFO L92 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 [2020-04-17 18:46:28,377 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:28,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:28,379 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:46:28,380 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:28,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:28,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-17 18:46:28,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254357765] [2020-04-17 18:46:28,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 18:46:28,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:28,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 18:46:28,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-04-17 18:46:28,396 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-04-17 18:46:28,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:28,526 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-04-17 18:46:28,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:46:28,526 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-04-17 18:46:28,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:28,528 INFO L225 Difference]: With dead ends: 77 [2020-04-17 18:46:28,528 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 18:46:28,528 INFO L678 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 [2020-04-17 18:46:28,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 18:46:28,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-04-17 18:46:28,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-04-17 18:46:28,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-04-17 18:46:28,534 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-04-17 18:46:28,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:28,534 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-04-17 18:46:28,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 18:46:28,535 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-04-17 18:46:28,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:46:28,535 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:28,536 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:28,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:28,737 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:28,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:28,738 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-04-17 18:46:28,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:28,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198591511] [2020-04-17 18:46:28,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:28,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198591511] [2020-04-17 18:46:28,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458544393] [2020-04-17 18:46:28,793 INFO L92 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 [2020-04-17 18:46:28,841 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 18:46:28,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:28,842 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:46:28,844 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:28,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:28,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 18:46:28,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100540969] [2020-04-17 18:46:28,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:46:28,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:28,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:46:28,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:28,865 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-04-17 18:46:29,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:29,053 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-04-17 18:46:29,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:46:29,055 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 18:46:29,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:29,057 INFO L225 Difference]: With dead ends: 56 [2020-04-17 18:46:29,057 INFO L226 Difference]: Without dead ends: 48 [2020-04-17 18:46:29,057 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:46:29,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-04-17 18:46:29,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-04-17 18:46:29,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-04-17 18:46:29,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-04-17 18:46:29,060 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-04-17 18:46:29,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:29,061 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-04-17 18:46:29,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:46:29,061 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-04-17 18:46:29,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 18:46:29,062 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:29,062 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:29,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:29,266 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:29,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:29,266 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-04-17 18:46:29,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:29,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523843403] [2020-04-17 18:46:29,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:29,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523843403] [2020-04-17 18:46:29,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229159064] [2020-04-17 18:46:29,330 INFO L92 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 [2020-04-17 18:46:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:29,381 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:46:29,382 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:29,394 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:29,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:29,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 18:46:29,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127605438] [2020-04-17 18:46:29,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:46:29,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:29,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:46:29,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:29,407 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-04-17 18:46:29,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:29,598 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-04-17 18:46:29,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:46:29,599 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 18:46:29,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:29,600 INFO L225 Difference]: With dead ends: 60 [2020-04-17 18:46:29,600 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 18:46:29,601 INFO L678 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 [2020-04-17 18:46:29,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 18:46:29,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-04-17 18:46:29,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 18:46:29,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 18:46:29,606 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-04-17 18:46:29,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:29,606 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 18:46:29,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:46:29,606 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 18:46:29,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:46:29,607 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:29,607 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:29,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:29,816 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:29,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:29,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-04-17 18:46:29,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:29,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297647922] [2020-04-17 18:46:29,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:29,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297647922] [2020-04-17 18:46:29,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577939912] [2020-04-17 18:46:29,901 INFO L92 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 [2020-04-17 18:46:29,954 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:29,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:29,955 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:46:29,961 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:29,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:29,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:29,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 18:46:29,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797375732] [2020-04-17 18:46:29,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:46:29,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:29,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:46:29,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:29,998 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-04-17 18:46:30,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:30,191 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-04-17 18:46:30,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:46:30,192 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 18:46:30,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:30,193 INFO L225 Difference]: With dead ends: 54 [2020-04-17 18:46:30,193 INFO L226 Difference]: Without dead ends: 49 [2020-04-17 18:46:30,194 INFO L678 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 [2020-04-17 18:46:30,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-04-17 18:46:30,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-04-17 18:46:30,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-04-17 18:46:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-04-17 18:46:30,198 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-04-17 18:46:30,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:30,198 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-04-17 18:46:30,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:46:30,198 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-04-17 18:46:30,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:46:30,199 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:30,199 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:30,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:30,402 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:30,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:30,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-04-17 18:46:30,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:30,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187491617] [2020-04-17 18:46:30,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:30,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187491617] [2020-04-17 18:46:30,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027193618] [2020-04-17 18:46:30,491 INFO L92 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 [2020-04-17 18:46:30,544 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:46:30,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:30,545 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:46:30,546 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:30,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:30,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:30,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 18:46:30,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70544992] [2020-04-17 18:46:30,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:46:30,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:30,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:46:30,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:30,562 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-04-17 18:46:30,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:30,674 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-04-17 18:46:30,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:46:30,674 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 18:46:30,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:30,675 INFO L225 Difference]: With dead ends: 60 [2020-04-17 18:46:30,675 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 18:46:30,676 INFO L678 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 [2020-04-17 18:46:30,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 18:46:30,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-04-17 18:46:30,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 18:46:30,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-04-17 18:46:30,680 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-04-17 18:46:30,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:30,681 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-04-17 18:46:30,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:46:30,681 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-04-17 18:46:30,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:46:30,682 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:30,682 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:30,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:30,886 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:30,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:30,887 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-04-17 18:46:30,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:30,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118054137] [2020-04-17 18:46:30,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:30,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:30,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118054137] [2020-04-17 18:46:30,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966297809] [2020-04-17 18:46:30,969 INFO L92 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 [2020-04-17 18:46:31,027 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:31,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:31,028 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:46:31,030 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:31,044 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:31,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:31,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 18:46:31,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692999265] [2020-04-17 18:46:31,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:46:31,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:31,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:46:31,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:31,055 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-04-17 18:46:31,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:31,189 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-04-17 18:46:31,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 18:46:31,192 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 18:46:31,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:31,193 INFO L225 Difference]: With dead ends: 66 [2020-04-17 18:46:31,193 INFO L226 Difference]: Without dead ends: 60 [2020-04-17 18:46:31,194 INFO L678 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 [2020-04-17 18:46:31,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-04-17 18:46:31,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-04-17 18:46:31,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-04-17 18:46:31,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-04-17 18:46:31,196 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-04-17 18:46:31,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:31,196 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-04-17 18:46:31,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:46:31,197 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-04-17 18:46:31,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:46:31,199 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:31,199 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:31,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:31,403 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:31,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:31,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-04-17 18:46:31,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:31,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040927724] [2020-04-17 18:46:31,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:31,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:31,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040927724] [2020-04-17 18:46:31,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530577073] [2020-04-17 18:46:31,485 INFO L92 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 [2020-04-17 18:46:31,549 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:46:31,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:31,550 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:46:31,551 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:31,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:31,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:31,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 18:46:31,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395963149] [2020-04-17 18:46:31,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:46:31,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:31,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:46:31,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:31,567 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-04-17 18:46:31,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:31,826 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-04-17 18:46:31,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:46:31,828 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 18:46:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:31,829 INFO L225 Difference]: With dead ends: 67 [2020-04-17 18:46:31,829 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 18:46:31,829 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-04-17 18:46:31,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 18:46:31,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-04-17 18:46:31,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-04-17 18:46:31,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-04-17 18:46:31,832 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-04-17 18:46:31,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:31,832 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-04-17 18:46:31,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:46:31,832 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-04-17 18:46:31,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:46:31,833 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:31,833 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:32,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:32,039 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:32,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:32,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-04-17 18:46:32,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:32,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097854553] [2020-04-17 18:46:32,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:32,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097854553] [2020-04-17 18:46:32,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465493587] [2020-04-17 18:46:32,104 INFO L92 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 [2020-04-17 18:46:32,149 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:46:32,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:32,150 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:46:32,151 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:32,166 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:32,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:32,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 18:46:32,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983727044] [2020-04-17 18:46:32,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:46:32,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:32,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:46:32,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:32,177 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-04-17 18:46:32,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:32,381 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-04-17 18:46:32,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:46:32,382 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 18:46:32,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:32,383 INFO L225 Difference]: With dead ends: 69 [2020-04-17 18:46:32,383 INFO L226 Difference]: Without dead ends: 63 [2020-04-17 18:46:32,384 INFO L678 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 [2020-04-17 18:46:32,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-04-17 18:46:32,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-04-17 18:46:32,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 18:46:32,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 18:46:32,388 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-04-17 18:46:32,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:32,388 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 18:46:32,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:46:32,388 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 18:46:32,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:46:32,389 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:32,389 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:32,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:32,592 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:32,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:32,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-04-17 18:46:32,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:32,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083706686] [2020-04-17 18:46:32,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:32,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083706686] [2020-04-17 18:46:32,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127259941] [2020-04-17 18:46:32,662 INFO L92 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 [2020-04-17 18:46:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:32,710 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:46:32,711 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:32,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:32,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:32,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 18:46:32,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314995160] [2020-04-17 18:46:32,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 18:46:32,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:32,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 18:46:32,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:46:32,722 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-04-17 18:46:32,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:32,914 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-04-17 18:46:32,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:46:32,915 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 18:46:32,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:32,916 INFO L225 Difference]: With dead ends: 88 [2020-04-17 18:46:32,916 INFO L226 Difference]: Without dead ends: 82 [2020-04-17 18:46:32,917 INFO L678 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 [2020-04-17 18:46:32,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-04-17 18:46:32,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-04-17 18:46:32,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 18:46:32,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-04-17 18:46:32,920 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-04-17 18:46:32,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:32,920 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-04-17 18:46:32,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 18:46:32,921 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-04-17 18:46:32,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 18:46:32,921 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:32,921 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:33,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:33,122 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:33,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:33,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-04-17 18:46:33,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:33,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647062929] [2020-04-17 18:46:33,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:33,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647062929] [2020-04-17 18:46:33,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845362317] [2020-04-17 18:46:33,185 INFO L92 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 [2020-04-17 18:46:33,230 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:33,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:33,231 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:46:33,232 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:33,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:33,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 18:46:33,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116602187] [2020-04-17 18:46:33,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:46:33,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:33,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:46:33,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:33,257 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-04-17 18:46:33,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:33,530 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-04-17 18:46:33,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:46:33,537 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 18:46:33,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:33,538 INFO L225 Difference]: With dead ends: 69 [2020-04-17 18:46:33,538 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 18:46:33,539 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:46:33,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 18:46:33,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-04-17 18:46:33,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-04-17 18:46:33,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-04-17 18:46:33,541 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-04-17 18:46:33,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:33,541 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-04-17 18:46:33,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:46:33,542 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-04-17 18:46:33,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:33,542 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:33,542 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:33,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:33,746 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:33,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:33,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-04-17 18:46:33,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:33,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000358709] [2020-04-17 18:46:33,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:33,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000358709] [2020-04-17 18:46:33,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432727745] [2020-04-17 18:46:33,837 INFO L92 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 [2020-04-17 18:46:33,881 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:46:33,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:33,882 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:46:33,882 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:33,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:33,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 18:46:33,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506189375] [2020-04-17 18:46:33,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:46:33,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:33,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:46:33,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:33,913 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-04-17 18:46:34,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:34,045 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-04-17 18:46:34,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:46:34,045 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 18:46:34,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:34,046 INFO L225 Difference]: With dead ends: 74 [2020-04-17 18:46:34,047 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 18:46:34,047 INFO L678 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 [2020-04-17 18:46:34,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 18:46:34,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-04-17 18:46:34,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 18:46:34,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 18:46:34,050 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-04-17 18:46:34,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:34,050 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 18:46:34,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:46:34,051 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 18:46:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:34,051 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:34,051 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:34,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:34,258 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:34,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:34,259 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-04-17 18:46:34,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:34,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105812532] [2020-04-17 18:46:34,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:34,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105812532] [2020-04-17 18:46:34,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649328704] [2020-04-17 18:46:34,337 INFO L92 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 [2020-04-17 18:46:34,387 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:34,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:34,388 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:46:34,389 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:34,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:34,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:34,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 18:46:34,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325026612] [2020-04-17 18:46:34,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:34,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:34,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:34,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:34,418 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-04-17 18:46:34,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:34,618 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-04-17 18:46:34,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:46:34,619 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 18:46:34,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:34,620 INFO L225 Difference]: With dead ends: 71 [2020-04-17 18:46:34,620 INFO L226 Difference]: Without dead ends: 65 [2020-04-17 18:46:34,621 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:46:34,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-04-17 18:46:34,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-04-17 18:46:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 18:46:34,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 18:46:34,624 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-04-17 18:46:34,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:34,624 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 18:46:34,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:34,624 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 18:46:34,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:34,625 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:34,625 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:34,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:34,826 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:34,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:34,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-04-17 18:46:34,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:34,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072475108] [2020-04-17 18:46:34,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:34,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072475108] [2020-04-17 18:46:34,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945625006] [2020-04-17 18:46:34,895 INFO L92 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 [2020-04-17 18:46:34,937 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 18:46:34,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:34,938 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:46:34,939 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:34,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:34,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 18:46:34,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655433358] [2020-04-17 18:46:34,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:46:34,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:34,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:46:34,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:34,957 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-04-17 18:46:35,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:35,151 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-04-17 18:46:35,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:46:35,152 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 18:46:35,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:35,153 INFO L225 Difference]: With dead ends: 68 [2020-04-17 18:46:35,153 INFO L226 Difference]: Without dead ends: 62 [2020-04-17 18:46:35,153 INFO L678 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 [2020-04-17 18:46:35,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-04-17 18:46:35,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-04-17 18:46:35,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 18:46:35,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 18:46:35,158 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-04-17 18:46:35,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:35,158 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 18:46:35,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:46:35,159 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 18:46:35,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:35,159 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:35,159 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:35,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:35,363 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:35,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:35,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-04-17 18:46:35,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:35,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399416497] [2020-04-17 18:46:35,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:35,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:35,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399416497] [2020-04-17 18:46:35,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566125988] [2020-04-17 18:46:35,437 INFO L92 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 [2020-04-17 18:46:35,481 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 18:46:35,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:35,481 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:46:35,482 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:35,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:35,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:35,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 18:46:35,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538783153] [2020-04-17 18:46:35,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:35,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:35,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:35,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:35,510 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-04-17 18:46:35,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:35,754 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-04-17 18:46:35,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:46:35,754 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 18:46:35,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:35,755 INFO L225 Difference]: With dead ends: 67 [2020-04-17 18:46:35,755 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 18:46:35,756 INFO L678 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 [2020-04-17 18:46:35,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 18:46:35,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-04-17 18:46:35,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 18:46:35,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 18:46:35,760 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-04-17 18:46:35,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:35,760 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 18:46:35,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:35,760 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 18:46:35,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:35,760 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:35,761 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:35,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:35,964 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:35,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:35,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-04-17 18:46:35,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:35,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814907813] [2020-04-17 18:46:35,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:36,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814907813] [2020-04-17 18:46:36,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887261517] [2020-04-17 18:46:36,034 INFO L92 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 [2020-04-17 18:46:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:36,085 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:46:36,086 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:36,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:36,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:36,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 18:46:36,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307248215] [2020-04-17 18:46:36,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:46:36,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:36,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:46:36,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:46:36,097 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-04-17 18:46:36,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:36,317 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-04-17 18:46:36,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:46:36,318 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 18:46:36,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:36,319 INFO L225 Difference]: With dead ends: 83 [2020-04-17 18:46:36,319 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 18:46:36,320 INFO L678 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 [2020-04-17 18:46:36,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 18:46:36,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-04-17 18:46:36,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 18:46:36,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-04-17 18:46:36,323 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-04-17 18:46:36,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:36,324 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-04-17 18:46:36,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:46:36,324 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-04-17 18:46:36,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:36,324 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:36,324 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:36,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:36,527 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:36,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:36,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-04-17 18:46:36,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:36,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145644513] [2020-04-17 18:46:36,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:36,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145644513] [2020-04-17 18:46:36,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140026406] [2020-04-17 18:46:36,613 INFO L92 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 [2020-04-17 18:46:36,666 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:36,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:36,667 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:36,669 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:36,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:36,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 18:46:36,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353094330] [2020-04-17 18:46:36,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:36,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:36,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:36,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:36,708 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-04-17 18:46:37,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:37,096 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-04-17 18:46:37,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:46:37,097 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 18:46:37,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:37,098 INFO L225 Difference]: With dead ends: 62 [2020-04-17 18:46:37,098 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 18:46:37,099 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:46:37,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 18:46:37,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-04-17 18:46:37,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-04-17 18:46:37,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-04-17 18:46:37,104 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-04-17 18:46:37,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:37,104 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-04-17 18:46:37,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:37,105 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-04-17 18:46:37,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 18:46:37,105 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:37,105 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:37,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:37,307 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:37,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:37,307 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-04-17 18:46:37,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:37,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263640499] [2020-04-17 18:46:37,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:37,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263640499] [2020-04-17 18:46:37,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122257539] [2020-04-17 18:46:37,382 INFO L92 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 [2020-04-17 18:46:37,430 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 18:46:37,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:37,430 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:46:37,431 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:37,444 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:37,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:37,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 18:46:37,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075018337] [2020-04-17 18:46:37,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:37,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:37,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:37,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:37,455 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-04-17 18:46:37,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:37,740 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-04-17 18:46:37,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:46:37,741 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 18:46:37,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:37,742 INFO L225 Difference]: With dead ends: 68 [2020-04-17 18:46:37,742 INFO L226 Difference]: Without dead ends: 63 [2020-04-17 18:46:37,743 INFO L678 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 [2020-04-17 18:46:37,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-04-17 18:46:37,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-04-17 18:46:37,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 18:46:37,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-04-17 18:46:37,746 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-04-17 18:46:37,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:37,747 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-04-17 18:46:37,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:37,747 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-04-17 18:46:37,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:37,747 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:37,747 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:37,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:37,948 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:37,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:37,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-04-17 18:46:37,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:37,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736160047] [2020-04-17 18:46:37,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:38,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:38,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736160047] [2020-04-17 18:46:38,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720785367] [2020-04-17 18:46:38,023 INFO L92 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 [2020-04-17 18:46:38,066 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:38,066 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:38,067 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:38,067 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:38,082 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:38,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:38,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 18:46:38,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249429767] [2020-04-17 18:46:38,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:38,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:38,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:38,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:38,095 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-04-17 18:46:38,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:38,376 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-04-17 18:46:38,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:46:38,381 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 18:46:38,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:38,382 INFO L225 Difference]: With dead ends: 60 [2020-04-17 18:46:38,382 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 18:46:38,383 INFO L678 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 [2020-04-17 18:46:38,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 18:46:38,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-04-17 18:46:38,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 18:46:38,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-04-17 18:46:38,385 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-04-17 18:46:38,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:38,386 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-04-17 18:46:38,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:38,386 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-04-17 18:46:38,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:38,386 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:38,386 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:38,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:38,590 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:38,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:38,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-04-17 18:46:38,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:38,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185323285] [2020-04-17 18:46:38,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:38,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185323285] [2020-04-17 18:46:38,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490450661] [2020-04-17 18:46:38,684 INFO L92 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 [2020-04-17 18:46:38,743 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 18:46:38,744 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:38,745 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:38,746 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:38,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:38,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 18:46:38,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327739938] [2020-04-17 18:46:38,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:38,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:38,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:38,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:38,755 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-04-17 18:46:38,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:38,902 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-04-17 18:46:38,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 18:46:38,902 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 18:46:38,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:38,903 INFO L225 Difference]: With dead ends: 66 [2020-04-17 18:46:38,904 INFO L226 Difference]: Without dead ends: 60 [2020-04-17 18:46:38,904 INFO L678 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 [2020-04-17 18:46:38,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-04-17 18:46:38,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-04-17 18:46:38,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 18:46:38,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-04-17 18:46:38,907 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-04-17 18:46:38,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:38,908 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-04-17 18:46:38,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:38,908 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-04-17 18:46:38,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:38,908 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:38,908 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:39,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:39,112 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:39,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:39,113 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-04-17 18:46:39,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:39,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383747629] [2020-04-17 18:46:39,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:39,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383747629] [2020-04-17 18:46:39,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955321446] [2020-04-17 18:46:39,252 INFO L92 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 [2020-04-17 18:46:39,338 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 18:46:39,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:39,340 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:39,341 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:39,373 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:39,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:39,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 18:46:39,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013621306] [2020-04-17 18:46:39,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:39,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:39,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:39,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:39,390 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-04-17 18:46:39,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:39,610 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-04-17 18:46:39,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 18:46:39,610 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 18:46:39,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:39,612 INFO L225 Difference]: With dead ends: 74 [2020-04-17 18:46:39,612 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 18:46:39,612 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:46:39,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 18:46:39,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-04-17 18:46:39,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-04-17 18:46:39,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-04-17 18:46:39,617 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-04-17 18:46:39,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:39,617 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-04-17 18:46:39,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:39,617 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-04-17 18:46:39,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:39,618 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:39,618 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:39,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:39,823 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:39,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:39,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-04-17 18:46:39,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:39,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621377826] [2020-04-17 18:46:39,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:39,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621377826] [2020-04-17 18:46:39,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91955692] [2020-04-17 18:46:39,955 INFO L92 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 [2020-04-17 18:46:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:40,020 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:40,021 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:40,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:40,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:40,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 18:46:40,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63099557] [2020-04-17 18:46:40,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:40,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:40,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:40,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:40,042 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-04-17 18:46:40,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:40,243 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-04-17 18:46:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:46:40,243 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 18:46:40,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:40,244 INFO L225 Difference]: With dead ends: 75 [2020-04-17 18:46:40,244 INFO L226 Difference]: Without dead ends: 69 [2020-04-17 18:46:40,245 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-04-17 18:46:40,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-04-17 18:46:40,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-04-17 18:46:40,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 18:46:40,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 18:46:40,249 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-04-17 18:46:40,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:40,250 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 18:46:40,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:40,250 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 18:46:40,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:40,250 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:40,250 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:40,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:40,454 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:40,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:40,455 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-04-17 18:46:40,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:40,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577626619] [2020-04-17 18:46:40,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:40,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577626619] [2020-04-17 18:46:40,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145856340] [2020-04-17 18:46:40,544 INFO L92 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 [2020-04-17 18:46:40,591 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:40,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:40,592 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:40,593 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:40,604 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:40,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:40,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 18:46:40,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438114449] [2020-04-17 18:46:40,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:40,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:40,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:40,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:40,613 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-04-17 18:46:40,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:40,875 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-04-17 18:46:40,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:46:40,876 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 18:46:40,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:40,876 INFO L225 Difference]: With dead ends: 79 [2020-04-17 18:46:40,877 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 18:46:40,877 INFO L678 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 [2020-04-17 18:46:40,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 18:46:40,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-04-17 18:46:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 18:46:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 18:46:40,879 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-04-17 18:46:40,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:40,880 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 18:46:40,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:40,880 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 18:46:40,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:40,880 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:40,881 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:41,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:41,081 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:41,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:41,082 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-04-17 18:46:41,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:41,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487385536] [2020-04-17 18:46:41,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:41,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:41,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487385536] [2020-04-17 18:46:41,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946361392] [2020-04-17 18:46:41,167 INFO L92 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 [2020-04-17 18:46:41,225 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 18:46:41,226 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:41,227 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:41,228 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:41,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:41,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 18:46:41,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811687662] [2020-04-17 18:46:41,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:41,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:41,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:41,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:41,245 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-04-17 18:46:41,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:41,487 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-04-17 18:46:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:46:41,487 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 18:46:41,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:41,488 INFO L225 Difference]: With dead ends: 79 [2020-04-17 18:46:41,488 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 18:46:41,489 INFO L678 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 [2020-04-17 18:46:41,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 18:46:41,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-04-17 18:46:41,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-04-17 18:46:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-04-17 18:46:41,492 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-04-17 18:46:41,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:41,492 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-04-17 18:46:41,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:41,492 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-04-17 18:46:41,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:41,493 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:41,493 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:41,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:41,697 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:41,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:41,697 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-04-17 18:46:41,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:41,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275916245] [2020-04-17 18:46:41,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:41,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275916245] [2020-04-17 18:46:41,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966515047] [2020-04-17 18:46:41,820 INFO L92 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 [2020-04-17 18:46:41,891 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:41,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:41,892 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:41,893 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:41,916 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:41,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:41,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 18:46:41,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349524232] [2020-04-17 18:46:41,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:41,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:41,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:41,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:41,932 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-04-17 18:46:42,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:42,379 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-04-17 18:46:42,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:46:42,380 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 18:46:42,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:42,381 INFO L225 Difference]: With dead ends: 76 [2020-04-17 18:46:42,381 INFO L226 Difference]: Without dead ends: 70 [2020-04-17 18:46:42,382 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-04-17 18:46:42,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-17 18:46:42,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-04-17 18:46:42,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 18:46:42,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-04-17 18:46:42,386 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-04-17 18:46:42,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:42,386 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-04-17 18:46:42,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:42,386 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-04-17 18:46:42,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:42,387 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:42,387 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:42,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:42,592 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:42,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:42,593 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-04-17 18:46:42,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:42,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143754697] [2020-04-17 18:46:42,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:42,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143754697] [2020-04-17 18:46:42,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613214247] [2020-04-17 18:46:42,667 INFO L92 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 [2020-04-17 18:46:42,713 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 18:46:42,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:42,714 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 18:46:42,715 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:42,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:42,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 18:46:42,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988752823] [2020-04-17 18:46:42,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 18:46:42,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:42,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 18:46:42,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-04-17 18:46:42,737 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-04-17 18:46:43,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:43,055 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-04-17 18:46:43,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:46:43,055 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 18:46:43,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:43,056 INFO L225 Difference]: With dead ends: 96 [2020-04-17 18:46:43,056 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 18:46:43,057 INFO L678 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 [2020-04-17 18:46:43,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 18:46:43,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-04-17 18:46:43,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 18:46:43,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-04-17 18:46:43,060 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-04-17 18:46:43,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:43,060 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-04-17 18:46:43,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 18:46:43,061 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-04-17 18:46:43,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 18:46:43,061 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:43,061 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:43,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:43,266 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:43,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:43,267 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-04-17 18:46:43,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:43,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197397777] [2020-04-17 18:46:43,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:43,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:43,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197397777] [2020-04-17 18:46:43,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013375750] [2020-04-17 18:46:43,369 INFO L92 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 [2020-04-17 18:46:43,417 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 18:46:43,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:43,418 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:43,419 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:43,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:43,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 18:46:43,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490632561] [2020-04-17 18:46:43,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:43,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:43,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:43,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:43,448 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-04-17 18:46:43,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:43,819 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-04-17 18:46:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:46:43,819 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 18:46:43,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:43,820 INFO L225 Difference]: With dead ends: 77 [2020-04-17 18:46:43,821 INFO L226 Difference]: Without dead ends: 69 [2020-04-17 18:46:43,821 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-04-17 18:46:43,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-04-17 18:46:43,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-04-17 18:46:43,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 18:46:43,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-04-17 18:46:43,824 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-04-17 18:46:43,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:43,825 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-04-17 18:46:43,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:43,825 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-04-17 18:46:43,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:43,825 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:43,825 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:44,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:44,028 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:44,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:44,028 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-04-17 18:46:44,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:44,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939333448] [2020-04-17 18:46:44,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:44,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:44,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939333448] [2020-04-17 18:46:44,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619729106] [2020-04-17 18:46:44,125 INFO L92 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 [2020-04-17 18:46:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:44,177 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:44,177 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:44,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:44,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 18:46:44,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158484258] [2020-04-17 18:46:44,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:44,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:44,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:44,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:44,201 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-04-17 18:46:44,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:44,392 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-04-17 18:46:44,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:46:44,393 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 18:46:44,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:44,394 INFO L225 Difference]: With dead ends: 84 [2020-04-17 18:46:44,394 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 18:46:44,394 INFO L678 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 [2020-04-17 18:46:44,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 18:46:44,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-04-17 18:46:44,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 18:46:44,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 18:46:44,397 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 18:46:44,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:44,397 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 18:46:44,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:44,397 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 18:46:44,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:44,398 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:44,398 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:44,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:44,601 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:44,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:44,602 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-04-17 18:46:44,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:44,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349915344] [2020-04-17 18:46:44,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:44,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349915344] [2020-04-17 18:46:44,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794307637] [2020-04-17 18:46:44,716 INFO L92 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 [2020-04-17 18:46:44,765 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:44,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:44,766 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:44,767 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:44,780 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:44,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:44,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 18:46:44,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601029226] [2020-04-17 18:46:44,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:44,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:44,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:44,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:44,791 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 18:46:45,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:45,062 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-04-17 18:46:45,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:46:45,062 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 18:46:45,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:45,063 INFO L225 Difference]: With dead ends: 81 [2020-04-17 18:46:45,063 INFO L226 Difference]: Without dead ends: 75 [2020-04-17 18:46:45,063 INFO L678 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 [2020-04-17 18:46:45,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-17 18:46:45,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-04-17 18:46:45,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 18:46:45,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 18:46:45,065 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 18:46:45,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:45,066 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 18:46:45,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:45,066 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 18:46:45,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:45,066 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:45,066 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:45,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:45,267 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:45,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:45,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-04-17 18:46:45,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:45,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271993315] [2020-04-17 18:46:45,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:45,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:45,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271993315] [2020-04-17 18:46:45,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15586369] [2020-04-17 18:46:45,350 INFO L92 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 [2020-04-17 18:46:45,424 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 18:46:45,424 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:45,425 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:45,425 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:45,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:45,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 18:46:45,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691962379] [2020-04-17 18:46:45,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:45,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:45,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:45,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:45,441 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 18:46:45,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:45,654 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-04-17 18:46:45,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:46:45,655 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 18:46:45,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:45,656 INFO L225 Difference]: With dead ends: 78 [2020-04-17 18:46:45,656 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 18:46:45,657 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-04-17 18:46:45,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 18:46:45,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-04-17 18:46:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 18:46:45,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 18:46:45,660 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 18:46:45,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:45,661 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 18:46:45,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:45,661 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 18:46:45,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:45,661 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:45,662 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:45,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:45,865 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:45,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:45,865 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-04-17 18:46:45,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:45,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801386502] [2020-04-17 18:46:45,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:45,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801386502] [2020-04-17 18:46:45,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419371619] [2020-04-17 18:46:45,968 INFO L92 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 [2020-04-17 18:46:46,021 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:46,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:46,022 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:46,023 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:46,034 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:46,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:46,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:46,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 18:46:46,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311196682] [2020-04-17 18:46:46,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:46,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:46,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:46,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:46,042 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 18:46:46,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:46,366 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-04-17 18:46:46,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:46:46,366 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 18:46:46,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:46,367 INFO L225 Difference]: With dead ends: 77 [2020-04-17 18:46:46,367 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 18:46:46,368 INFO L678 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 [2020-04-17 18:46:46,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 18:46:46,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-04-17 18:46:46,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 18:46:46,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 18:46:46,370 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 18:46:46,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:46,370 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 18:46:46,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:46,371 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 18:46:46,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:46,371 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:46,371 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:46,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:46,575 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:46,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:46,575 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-04-17 18:46:46,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:46,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611330717] [2020-04-17 18:46:46,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:46,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611330717] [2020-04-17 18:46:46,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303691377] [2020-04-17 18:46:46,668 INFO L92 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 [2020-04-17 18:46:46,711 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 18:46:46,712 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:46,713 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:46,713 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:46,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:46,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 18:46:46,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572325516] [2020-04-17 18:46:46,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:46,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:46,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:46,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:46,731 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 18:46:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:46,979 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-04-17 18:46:46,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:46:46,980 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 18:46:46,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:46,981 INFO L225 Difference]: With dead ends: 74 [2020-04-17 18:46:46,981 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 18:46:46,981 INFO L678 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 [2020-04-17 18:46:46,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 18:46:46,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-04-17 18:46:46,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 18:46:46,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 18:46:46,985 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 18:46:46,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:46,985 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 18:46:46,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:46,985 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 18:46:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:46,986 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:46,986 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:47,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:47,189 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:47,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:47,190 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-04-17 18:46:47,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:47,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439090630] [2020-04-17 18:46:47,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:47,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439090630] [2020-04-17 18:46:47,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312520720] [2020-04-17 18:46:47,286 INFO L92 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 [2020-04-17 18:46:47,333 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 18:46:47,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:47,334 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 18:46:47,334 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:47,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:47,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:47,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 18:46:47,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097283033] [2020-04-17 18:46:47,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:47,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:47,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:47,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:47,373 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 18:46:47,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:47,681 INFO L93 Difference]: Finished difference Result 71 states and 169 transitions. [2020-04-17 18:46:47,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:46:47,681 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 18:46:47,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:47,682 INFO L225 Difference]: With dead ends: 71 [2020-04-17 18:46:47,682 INFO L226 Difference]: Without dead ends: 65 [2020-04-17 18:46:47,682 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2020-04-17 18:46:47,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-04-17 18:46:47,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2020-04-17 18:46:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 18:46:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 18:46:47,685 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 18:46:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:47,685 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 18:46:47,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:47,685 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 18:46:47,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:47,686 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:47,686 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:47,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:47,889 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:47,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:47,890 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-04-17 18:46:47,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:47,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883522725] [2020-04-17 18:46:47,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:47,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883522725] [2020-04-17 18:46:47,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17775855] [2020-04-17 18:46:47,959 INFO L92 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 [2020-04-17 18:46:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:48,013 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:48,014 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:48,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:48,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 18:46:48,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681441758] [2020-04-17 18:46:48,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:46:48,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:48,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:46:48,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:46:48,034 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 18:46:48,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:48,316 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-04-17 18:46:48,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:46:48,316 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 18:46:48,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:48,318 INFO L225 Difference]: With dead ends: 89 [2020-04-17 18:46:48,318 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 18:46:48,318 INFO L678 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 [2020-04-17 18:46:48,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 18:46:48,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-04-17 18:46:48,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-04-17 18:46:48,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-04-17 18:46:48,323 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-04-17 18:46:48,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:48,323 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-04-17 18:46:48,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:46:48,323 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-04-17 18:46:48,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:48,324 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:48,324 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:48,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:48,525 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:48,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:48,525 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-04-17 18:46:48,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:48,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423358453] [2020-04-17 18:46:48,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:48,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423358453] [2020-04-17 18:46:48,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551840010] [2020-04-17 18:46:48,591 INFO L92 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 [2020-04-17 18:46:48,650 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:48,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:48,651 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:48,651 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:48,666 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:48,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:48,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 18:46:48,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945007040] [2020-04-17 18:46:48,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:48,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:48,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:48,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:48,677 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-04-17 18:46:49,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:49,074 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-04-17 18:46:49,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:46:49,075 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 18:46:49,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:49,076 INFO L225 Difference]: With dead ends: 70 [2020-04-17 18:46:49,076 INFO L226 Difference]: Without dead ends: 62 [2020-04-17 18:46:49,077 INFO L678 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 [2020-04-17 18:46:49,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-04-17 18:46:49,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-04-17 18:46:49,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-04-17 18:46:49,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-04-17 18:46:49,080 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-04-17 18:46:49,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:49,080 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-04-17 18:46:49,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:49,080 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-04-17 18:46:49,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 18:46:49,081 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:49,081 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:49,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:49,284 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:49,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:49,285 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-04-17 18:46:49,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:49,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328138554] [2020-04-17 18:46:49,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:49,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328138554] [2020-04-17 18:46:49,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078228867] [2020-04-17 18:46:49,381 INFO L92 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 [2020-04-17 18:46:49,447 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 18:46:49,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:49,447 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 18:46:49,448 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:49,463 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:49,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:49,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 18:46:49,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685757820] [2020-04-17 18:46:49,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:49,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:49,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:49,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:49,474 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-04-17 18:46:49,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:49,840 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-04-17 18:46:49,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:46:49,841 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 18:46:49,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:49,842 INFO L225 Difference]: With dead ends: 76 [2020-04-17 18:46:49,842 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 18:46:49,843 INFO L678 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 [2020-04-17 18:46:49,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 18:46:49,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-04-17 18:46:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 18:46:49,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-04-17 18:46:49,846 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-04-17 18:46:49,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:49,846 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-04-17 18:46:49,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:49,847 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-04-17 18:46:49,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:49,847 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:49,847 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:50,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:50,051 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:50,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:50,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-04-17 18:46:50,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:50,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757264028] [2020-04-17 18:46:50,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:50,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757264028] [2020-04-17 18:46:50,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187285239] [2020-04-17 18:46:50,149 INFO L92 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 [2020-04-17 18:46:50,195 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:50,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:50,196 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:50,197 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:50,210 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:50,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:50,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 18:46:50,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132581858] [2020-04-17 18:46:50,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:46:50,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:50,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:46:50,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:46:50,222 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-04-17 18:46:50,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:50,615 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-04-17 18:46:50,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:46:50,616 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 18:46:50,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:50,617 INFO L225 Difference]: With dead ends: 66 [2020-04-17 18:46:50,617 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 18:46:50,617 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:46:50,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 18:46:50,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-04-17 18:46:50,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 18:46:50,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-04-17 18:46:50,620 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-04-17 18:46:50,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:50,621 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-04-17 18:46:50,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:46:50,621 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-04-17 18:46:50,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:50,621 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:50,621 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:50,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:50,825 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:50,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:50,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-04-17 18:46:50,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:50,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101205015] [2020-04-17 18:46:50,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:50,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101205015] [2020-04-17 18:46:50,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840113472] [2020-04-17 18:46:50,947 INFO L92 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 [2020-04-17 18:46:51,021 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 18:46:51,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:51,022 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:51,023 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:51,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:51,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 18:46:51,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065511963] [2020-04-17 18:46:51,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:51,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:51,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:51,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:51,035 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-04-17 18:46:51,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:51,296 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-04-17 18:46:51,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 18:46:51,297 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 18:46:51,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:51,298 INFO L225 Difference]: With dead ends: 72 [2020-04-17 18:46:51,298 INFO L226 Difference]: Without dead ends: 66 [2020-04-17 18:46:51,300 INFO L678 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 [2020-04-17 18:46:51,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-04-17 18:46:51,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-04-17 18:46:51,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 18:46:51,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-04-17 18:46:51,304 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-04-17 18:46:51,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:51,304 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-04-17 18:46:51,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:51,305 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-04-17 18:46:51,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:51,305 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:51,305 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:51,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:51,511 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:51,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:51,511 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-04-17 18:46:51,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:51,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973537779] [2020-04-17 18:46:51,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:51,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973537779] [2020-04-17 18:46:51,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597709586] [2020-04-17 18:46:51,623 INFO L92 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 [2020-04-17 18:46:51,679 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 18:46:51,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:51,680 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:51,681 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:51,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:51,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:51,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 18:46:51,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367243014] [2020-04-17 18:46:51,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:46:51,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:51,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:46:51,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:46:51,706 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-04-17 18:46:51,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:51,930 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-04-17 18:46:51,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 18:46:51,931 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 18:46:51,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:51,932 INFO L225 Difference]: With dead ends: 82 [2020-04-17 18:46:51,932 INFO L226 Difference]: Without dead ends: 76 [2020-04-17 18:46:51,933 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-04-17 18:46:51,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-04-17 18:46:51,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-04-17 18:46:51,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 18:46:51,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-04-17 18:46:51,936 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-04-17 18:46:51,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:51,936 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-04-17 18:46:51,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:46:51,936 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-04-17 18:46:51,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:51,937 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:51,937 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:52,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:52,141 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:52,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:52,141 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-04-17 18:46:52,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:52,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133308077] [2020-04-17 18:46:52,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:52,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:52,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133308077] [2020-04-17 18:46:52,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892165804] [2020-04-17 18:46:52,261 INFO L92 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 [2020-04-17 18:46:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:52,313 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:52,314 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:52,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:52,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 18:46:52,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004009389] [2020-04-17 18:46:52,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:52,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:52,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:52,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:52,327 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-04-17 18:46:52,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:52,575 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-04-17 18:46:52,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:46:52,575 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 18:46:52,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:52,577 INFO L225 Difference]: With dead ends: 83 [2020-04-17 18:46:52,577 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 18:46:52,577 INFO L678 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 [2020-04-17 18:46:52,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 18:46:52,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-04-17 18:46:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 18:46:52,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-04-17 18:46:52,580 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-04-17 18:46:52,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:52,580 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-04-17 18:46:52,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:52,580 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-04-17 18:46:52,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:52,581 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:52,581 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:52,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:52,784 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:52,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:52,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-04-17 18:46:52,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:52,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385545044] [2020-04-17 18:46:52,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:52,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:52,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385545044] [2020-04-17 18:46:52,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557672862] [2020-04-17 18:46:52,899 INFO L92 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 [2020-04-17 18:46:52,944 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:52,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:52,945 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:52,945 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:52,958 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:52,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:52,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:52,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 18:46:52,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767537290] [2020-04-17 18:46:52,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:46:52,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:52,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:46:52,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:46:52,967 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-04-17 18:46:53,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:53,249 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-04-17 18:46:53,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:46:53,255 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 18:46:53,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:53,255 INFO L225 Difference]: With dead ends: 89 [2020-04-17 18:46:53,255 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 18:46:53,256 INFO L678 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 [2020-04-17 18:46:53,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 18:46:53,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-04-17 18:46:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 18:46:53,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-04-17 18:46:53,259 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-04-17 18:46:53,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:53,259 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-04-17 18:46:53,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:46:53,259 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-04-17 18:46:53,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:53,260 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:53,260 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:53,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:53,463 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:53,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:53,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-04-17 18:46:53,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:53,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942324192] [2020-04-17 18:46:53,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:53,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942324192] [2020-04-17 18:46:53,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817613475] [2020-04-17 18:46:53,557 INFO L92 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 [2020-04-17 18:46:53,625 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 18:46:53,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:53,626 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:53,627 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:53,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:53,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 18:46:53,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151731416] [2020-04-17 18:46:53,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:53,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:53,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:53,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:53,648 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-04-17 18:46:54,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:54,004 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-04-17 18:46:54,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:46:54,005 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 18:46:54,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:54,005 INFO L225 Difference]: With dead ends: 89 [2020-04-17 18:46:54,005 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 18:46:54,005 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-04-17 18:46:54,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 18:46:54,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-04-17 18:46:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 18:46:54,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 18:46:54,007 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-04-17 18:46:54,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:54,008 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 18:46:54,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:54,008 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 18:46:54,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:54,008 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:54,008 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:54,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:54,209 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:54,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:54,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-04-17 18:46:54,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:54,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575629577] [2020-04-17 18:46:54,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:54,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:54,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575629577] [2020-04-17 18:46:54,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714377361] [2020-04-17 18:46:54,314 INFO L92 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 [2020-04-17 18:46:54,360 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:54,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:54,361 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:54,361 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:54,373 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:54,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:54,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:54,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 18:46:54,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141056262] [2020-04-17 18:46:54,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:46:54,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:54,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:46:54,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:46:54,383 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-04-17 18:46:54,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:54,735 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-04-17 18:46:54,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:46:54,736 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 18:46:54,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:54,736 INFO L225 Difference]: With dead ends: 86 [2020-04-17 18:46:54,736 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 18:46:54,737 INFO L678 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 [2020-04-17 18:46:54,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 18:46:54,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-04-17 18:46:54,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 18:46:54,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 18:46:54,739 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-04-17 18:46:54,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:54,739 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 18:46:54,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:46:54,740 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 18:46:54,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:54,740 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:54,740 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:54,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:54,941 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:54,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:54,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-04-17 18:46:54,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:54,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237845679] [2020-04-17 18:46:54,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:55,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237845679] [2020-04-17 18:46:55,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654017147] [2020-04-17 18:46:55,035 INFO L92 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 [2020-04-17 18:46:55,084 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 18:46:55,084 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:55,085 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:55,086 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:55,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:55,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 18:46:55,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450952400] [2020-04-17 18:46:55,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:55,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:55,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:55,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:55,100 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-04-17 18:46:55,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:55,441 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-04-17 18:46:55,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 18:46:55,441 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 18:46:55,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:55,442 INFO L225 Difference]: With dead ends: 87 [2020-04-17 18:46:55,442 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 18:46:55,443 INFO L678 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 [2020-04-17 18:46:55,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 18:46:55,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-04-17 18:46:55,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-04-17 18:46:55,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-04-17 18:46:55,447 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-04-17 18:46:55,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:55,447 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-04-17 18:46:55,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:55,447 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-04-17 18:46:55,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:55,447 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:55,448 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:55,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:55,651 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:55,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:55,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-04-17 18:46:55,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:55,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105688280] [2020-04-17 18:46:55,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:55,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105688280] [2020-04-17 18:46:55,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654372976] [2020-04-17 18:46:55,733 INFO L92 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 [2020-04-17 18:46:55,794 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 18:46:55,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:55,795 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:55,796 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:55,814 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:55,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:55,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:55,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 18:46:55,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275096920] [2020-04-17 18:46:55,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:46:55,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:55,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:46:55,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:46:55,828 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-04-17 18:46:56,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:56,253 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-04-17 18:46:56,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:46:56,253 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 18:46:56,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:56,254 INFO L225 Difference]: With dead ends: 84 [2020-04-17 18:46:56,254 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 18:46:56,255 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-04-17 18:46:56,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 18:46:56,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-04-17 18:46:56,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 18:46:56,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-04-17 18:46:56,259 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-04-17 18:46:56,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:56,259 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-04-17 18:46:56,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:46:56,259 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-04-17 18:46:56,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:56,260 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:56,260 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:56,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:56,463 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:56,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:56,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-04-17 18:46:56,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:56,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498015940] [2020-04-17 18:46:56,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:56,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498015940] [2020-04-17 18:46:56,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424433283] [2020-04-17 18:46:56,558 INFO L92 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 [2020-04-17 18:46:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:56,605 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:56,606 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:56,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:56,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 18:46:56,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184758472] [2020-04-17 18:46:56,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 18:46:56,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:56,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 18:46:56,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 18:46:56,630 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-04-17 18:46:56,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:56,984 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-04-17 18:46:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:46:56,985 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 18:46:56,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:56,986 INFO L225 Difference]: With dead ends: 104 [2020-04-17 18:46:56,986 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 18:46:56,986 INFO L678 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 [2020-04-17 18:46:56,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 18:46:56,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-04-17 18:46:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 18:46:56,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-04-17 18:46:56,990 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-04-17 18:46:56,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:56,990 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-04-17 18:46:56,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 18:46:56,990 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-04-17 18:46:56,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:46:56,991 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:56,991 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:57,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:57,194 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:57,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:57,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-04-17 18:46:57,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:57,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624492890] [2020-04-17 18:46:57,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:57,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624492890] [2020-04-17 18:46:57,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620167972] [2020-04-17 18:46:57,283 INFO L92 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 [2020-04-17 18:46:57,324 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:46:57,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:57,325 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 18:46:57,326 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:57,345 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:57,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:57,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:57,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 18:46:57,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385341078] [2020-04-17 18:46:57,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:46:57,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:57,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:46:57,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:46:57,356 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-04-17 18:46:57,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:57,838 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-04-17 18:46:57,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:46:57,839 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 18:46:57,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:57,840 INFO L225 Difference]: With dead ends: 85 [2020-04-17 18:46:57,840 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 18:46:57,840 INFO L678 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 [2020-04-17 18:46:57,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 18:46:57,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-04-17 18:46:57,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-17 18:46:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-04-17 18:46:57,844 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-04-17 18:46:57,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:57,844 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-04-17 18:46:57,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:46:57,845 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-04-17 18:46:57,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:46:57,845 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:57,845 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:58,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:58,050 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:58,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:58,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-04-17 18:46:58,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:58,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996938174] [2020-04-17 18:46:58,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:58,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996938174] [2020-04-17 18:46:58,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510097461] [2020-04-17 18:46:58,199 INFO L92 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 [2020-04-17 18:46:58,248 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 18:46:58,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:58,248 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:46:58,249 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:58,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:58,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 18:46:58,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795383837] [2020-04-17 18:46:58,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:46:58,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:58,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:46:58,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:46:58,257 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-04-17 18:46:58,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:58,473 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-04-17 18:46:58,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 18:46:58,473 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 18:46:58,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:58,474 INFO L225 Difference]: With dead ends: 94 [2020-04-17 18:46:58,475 INFO L226 Difference]: Without dead ends: 88 [2020-04-17 18:46:58,475 INFO L678 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 [2020-04-17 18:46:58,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-04-17 18:46:58,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-04-17 18:46:58,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 18:46:58,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 18:46:58,478 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 18:46:58,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:58,478 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 18:46:58,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:46:58,478 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 18:46:58,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:46:58,479 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:58,479 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:58,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:58,682 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:58,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:58,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-04-17 18:46:58,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:58,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880906896] [2020-04-17 18:46:58,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:58,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:58,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:58,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880906896] [2020-04-17 18:46:58,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587850130] [2020-04-17 18:46:58,800 INFO L92 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 [2020-04-17 18:46:58,847 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:46:58,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:58,848 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:46:58,848 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:58,862 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:46:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:58,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:58,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 18:46:58,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778732030] [2020-04-17 18:46:58,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:46:58,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:58,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:46:58,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:46:58,871 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 18:46:59,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:59,175 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-04-17 18:46:59,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 18:46:59,176 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 18:46:59,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:59,177 INFO L225 Difference]: With dead ends: 91 [2020-04-17 18:46:59,177 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 18:46:59,177 INFO L678 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 [2020-04-17 18:46:59,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 18:46:59,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-04-17 18:46:59,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 18:46:59,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 18:46:59,180 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 18:46:59,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:59,180 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 18:46:59,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:46:59,181 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 18:46:59,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:46:59,181 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:59,181 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:46:59,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:46:59,382 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:46:59,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:46:59,383 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-04-17 18:46:59,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:46:59,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052489994] [2020-04-17 18:46:59,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:46:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:46:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:59,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052489994] [2020-04-17 18:46:59,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300805178] [2020-04-17 18:46:59,504 INFO L92 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 [2020-04-17 18:46:59,554 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 18:46:59,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:46:59,555 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:46:59,556 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:46:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:46:59,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:46:59,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 18:46:59,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413262092] [2020-04-17 18:46:59,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:46:59,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:46:59,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:46:59,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:46:59,569 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 18:46:59,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:46:59,830 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-04-17 18:46:59,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 18:46:59,830 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 18:46:59,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:46:59,831 INFO L225 Difference]: With dead ends: 88 [2020-04-17 18:46:59,831 INFO L226 Difference]: Without dead ends: 82 [2020-04-17 18:46:59,832 INFO L678 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 [2020-04-17 18:46:59,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-04-17 18:46:59,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-04-17 18:46:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 18:46:59,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 18:46:59,835 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 18:46:59,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:46:59,835 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 18:46:59,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:46:59,836 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 18:46:59,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:46:59,836 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:46:59,836 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:00,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:00,040 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:00,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:00,040 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-04-17 18:47:00,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:00,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697236782] [2020-04-17 18:47:00,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:00,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697236782] [2020-04-17 18:47:00,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935989129] [2020-04-17 18:47:00,155 INFO L92 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 [2020-04-17 18:47:00,206 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 18:47:00,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:00,207 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:47:00,207 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:00,231 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:00,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:00,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 18:47:00,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375382605] [2020-04-17 18:47:00,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:47:00,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:00,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:47:00,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:47:00,240 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 18:47:00,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:00,611 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-04-17 18:47:00,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 18:47:00,611 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 18:47:00,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:00,612 INFO L225 Difference]: With dead ends: 87 [2020-04-17 18:47:00,612 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 18:47:00,613 INFO L678 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 [2020-04-17 18:47:00,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 18:47:00,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-04-17 18:47:00,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 18:47:00,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 18:47:00,615 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 18:47:00,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:00,615 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 18:47:00,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:47:00,615 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 18:47:00,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:47:00,616 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:00,616 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:00,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:00,817 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:00,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:00,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-04-17 18:47:00,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:00,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672800288] [2020-04-17 18:47:00,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:00,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672800288] [2020-04-17 18:47:00,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510404982] [2020-04-17 18:47:00,926 INFO L92 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 [2020-04-17 18:47:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:00,974 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:47:00,975 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:00,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:00,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 18:47:00,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894196493] [2020-04-17 18:47:00,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:47:00,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:00,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:47:00,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:47:00,987 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 18:47:01,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:01,275 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-04-17 18:47:01,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 18:47:01,275 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 18:47:01,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:01,276 INFO L225 Difference]: With dead ends: 84 [2020-04-17 18:47:01,277 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 18:47:01,277 INFO L678 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 [2020-04-17 18:47:01,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 18:47:01,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-04-17 18:47:01,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 18:47:01,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 18:47:01,280 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 18:47:01,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:01,281 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 18:47:01,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:47:01,281 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 18:47:01,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:47:01,281 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:01,282 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:01,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:01,485 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:01,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:01,485 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-04-17 18:47:01,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:01,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579713129] [2020-04-17 18:47:01,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:01,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579713129] [2020-04-17 18:47:01,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595678436] [2020-04-17 18:47:01,602 INFO L92 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 [2020-04-17 18:47:01,648 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:47:01,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:01,649 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:47:01,650 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:01,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:01,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:01,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 18:47:01,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553248788] [2020-04-17 18:47:01,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:47:01,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:01,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:47:01,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:47:01,671 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 18:47:02,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:02,083 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-04-17 18:47:02,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 18:47:02,083 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 18:47:02,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:02,084 INFO L225 Difference]: With dead ends: 83 [2020-04-17 18:47:02,084 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 18:47:02,085 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-04-17 18:47:02,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 18:47:02,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-04-17 18:47:02,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 18:47:02,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 18:47:02,088 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 18:47:02,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:02,089 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 18:47:02,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:47:02,089 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 18:47:02,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:47:02,089 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:02,089 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:02,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:02,293 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:02,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:02,293 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-04-17 18:47:02,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:02,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872014286] [2020-04-17 18:47:02,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:02,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872014286] [2020-04-17 18:47:02,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61682986] [2020-04-17 18:47:02,392 INFO L92 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 [2020-04-17 18:47:02,445 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 18:47:02,445 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:02,446 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:47:02,447 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:02,456 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:02,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:02,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 18:47:02,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253640453] [2020-04-17 18:47:02,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:47:02,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:02,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:47:02,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:47:02,458 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 18:47:02,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:02,813 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-04-17 18:47:02,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 18:47:02,813 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 18:47:02,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:02,814 INFO L225 Difference]: With dead ends: 80 [2020-04-17 18:47:02,814 INFO L226 Difference]: Without dead ends: 74 [2020-04-17 18:47:02,814 INFO L678 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 [2020-04-17 18:47:02,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-04-17 18:47:02,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-04-17 18:47:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 18:47:02,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 18:47:02,816 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 18:47:02,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:02,816 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 18:47:02,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:47:02,817 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 18:47:02,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:47:02,817 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:02,817 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:03,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:03,021 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:03,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:03,021 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-04-17 18:47:03,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:03,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851892639] [2020-04-17 18:47:03,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:03,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851892639] [2020-04-17 18:47:03,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171129222] [2020-04-17 18:47:03,116 INFO L92 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 [2020-04-17 18:47:03,166 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 18:47:03,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:03,167 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:47:03,168 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:03,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:03,188 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:03,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:03,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 18:47:03,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857933748] [2020-04-17 18:47:03,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:47:03,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:03,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:47:03,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:47:03,190 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 18:47:03,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:03,691 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-04-17 18:47:03,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:47:03,692 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 18:47:03,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:03,693 INFO L225 Difference]: With dead ends: 79 [2020-04-17 18:47:03,693 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 18:47:03,693 INFO L678 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 [2020-04-17 18:47:03,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 18:47:03,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-04-17 18:47:03,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 18:47:03,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 18:47:03,696 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 18:47:03,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:03,696 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 18:47:03,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:47:03,697 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 18:47:03,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:47:03,697 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:03,697 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:03,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:03,899 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:03,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:03,899 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-04-17 18:47:03,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:03,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367969986] [2020-04-17 18:47:03,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:03,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367969986] [2020-04-17 18:47:03,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984112287] [2020-04-17 18:47:03,981 INFO L92 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 [2020-04-17 18:47:04,030 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 18:47:04,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:04,032 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:47:04,033 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:04,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:04,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 18:47:04,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70080456] [2020-04-17 18:47:04,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:47:04,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:04,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:47:04,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:47:04,045 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 18:47:04,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:04,437 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-04-17 18:47:04,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:47:04,437 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 18:47:04,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:04,438 INFO L225 Difference]: With dead ends: 95 [2020-04-17 18:47:04,439 INFO L226 Difference]: Without dead ends: 89 [2020-04-17 18:47:04,439 INFO L678 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 [2020-04-17 18:47:04,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-04-17 18:47:04,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-04-17 18:47:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 18:47:04,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-04-17 18:47:04,445 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-04-17 18:47:04,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:04,445 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-04-17 18:47:04,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:47:04,446 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-04-17 18:47:04,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:47:04,446 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:04,446 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:04,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:04,647 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:04,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:04,647 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-04-17 18:47:04,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:04,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021354155] [2020-04-17 18:47:04,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:04,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021354155] [2020-04-17 18:47:04,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852840020] [2020-04-17 18:47:04,736 INFO L92 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 [2020-04-17 18:47:04,784 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 18:47:04,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:04,785 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 18:47:04,786 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:04,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:04,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 18:47:04,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264276033] [2020-04-17 18:47:04,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:47:04,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:04,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:47:04,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:47:04,812 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-04-17 18:47:05,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:05,274 INFO L93 Difference]: Finished difference Result 74 states and 181 transitions. [2020-04-17 18:47:05,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 18:47:05,275 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 18:47:05,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:05,276 INFO L225 Difference]: With dead ends: 74 [2020-04-17 18:47:05,276 INFO L226 Difference]: Without dead ends: 66 [2020-04-17 18:47:05,277 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=796, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 18:47:05,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-04-17 18:47:05,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2020-04-17 18:47:05,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-04-17 18:47:05,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-04-17 18:47:05,279 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-04-17 18:47:05,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:05,280 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-04-17 18:47:05,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:47:05,280 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-04-17 18:47:05,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 18:47:05,280 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:05,280 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:05,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:05,484 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:05,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:05,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-04-17 18:47:05,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:05,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503156345] [2020-04-17 18:47:05,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:05,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503156345] [2020-04-17 18:47:05,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178661863] [2020-04-17 18:47:05,575 INFO L92 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 [2020-04-17 18:47:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:05,619 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 18:47:05,620 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:05,632 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 18:47:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:05,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:47:05,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 18:47:05,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655739336] [2020-04-17 18:47:05,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 18:47:05,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:05,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 18:47:05,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 18:47:05,643 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-04-17 18:47:06,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:06,112 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-04-17 18:47:06,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 18:47:06,113 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 18:47:06,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:06,113 INFO L225 Difference]: With dead ends: 84 [2020-04-17 18:47:06,114 INFO L226 Difference]: Without dead ends: 79 [2020-04-17 18:47:06,114 INFO L678 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 [2020-04-17 18:47:06,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-04-17 18:47:06,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-04-17 18:47:06,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 18:47:06,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-04-17 18:47:06,116 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-04-17 18:47:06,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:06,116 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-04-17 18:47:06,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 18:47:06,116 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-04-17 18:47:06,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:47:06,117 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:06,117 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:06,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:06,321 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:06,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:06,322 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-04-17 18:47:06,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:06,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329738298] [2020-04-17 18:47:06,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:06,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329738298] [2020-04-17 18:47:06,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972464318] [2020-04-17 18:47:06,392 INFO L92 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 [2020-04-17 18:47:06,448 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 18:47:06,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:06,449 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:47:06,450 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:06,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 18:47:06,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-04-17 18:47:06,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747921679] [2020-04-17 18:47:06,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 18:47:06,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:06,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 18:47:06,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:47:06,456 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 8 states. [2020-04-17 18:47:06,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:06,472 INFO L93 Difference]: Finished difference Result 151 states and 338 transitions. [2020-04-17 18:47:06,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:47:06,472 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-04-17 18:47:06,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:06,473 INFO L225 Difference]: With dead ends: 151 [2020-04-17 18:47:06,473 INFO L226 Difference]: Without dead ends: 50 [2020-04-17 18:47:06,473 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-04-17 18:47:06,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-04-17 18:47:06,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-04-17 18:47:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 18:47:06,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 100 transitions. [2020-04-17 18:47:06,476 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 100 transitions. Word has length 19 [2020-04-17 18:47:06,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:06,476 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 100 transitions. [2020-04-17 18:47:06,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 18:47:06,476 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 100 transitions. [2020-04-17 18:47:06,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 18:47:06,477 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:47:06,477 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:47:06,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:06,678 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:47:06,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:47:06,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-04-17 18:47:06,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:47:06,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004129042] [2020-04-17 18:47:06,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:47:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:47:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:06,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004129042] [2020-04-17 18:47:06,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258082683] [2020-04-17 18:47:06,913 INFO L92 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 [2020-04-17 18:47:07,005 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 18:47:07,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 18:47:07,007 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:47:07,008 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:47:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:47:07,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 18:47:07,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 22 [2020-04-17 18:47:07,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594889237] [2020-04-17 18:47:07,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 18:47:07,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:47:07,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 18:47:07,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:47:07,140 INFO L87 Difference]: Start difference. First operand 50 states and 100 transitions. Second operand 8 states. [2020-04-17 18:47:07,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:47:07,157 INFO L93 Difference]: Finished difference Result 86 states and 150 transitions. [2020-04-17 18:47:07,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:47:07,158 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-04-17 18:47:07,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:47:07,159 INFO L225 Difference]: With dead ends: 86 [2020-04-17 18:47:07,159 INFO L226 Difference]: Without dead ends: 0 [2020-04-17 18:47:07,159 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:47:07,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-04-17 18:47:07,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-04-17 18:47:07,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-04-17 18:47:07,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-04-17 18:47:07,161 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-04-17 18:47:07,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:47:07,161 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-04-17 18:47:07,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 18:47:07,161 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-04-17 18:47:07,162 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-17 18:47:07,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:47:07,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 06:47:07 BasicIcfg [2020-04-17 18:47:07,373 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 18:47:07,374 INFO L168 Benchmark]: Toolchain (without parser) took 46845.83 ms. Allocated memory was 140.5 MB in the beginning and 422.6 MB in the end (delta: 282.1 MB). Free memory was 101.4 MB in the beginning and 137.9 MB in the end (delta: -36.4 MB). Peak memory consumption was 245.6 MB. Max. memory is 7.1 GB. [2020-04-17 18:47:07,375 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 140.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-04-17 18:47:07,376 INFO L168 Benchmark]: CACSL2BoogieTranslator took 717.27 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 99.6 MB in the beginning and 161.5 MB in the end (delta: -61.9 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-04-17 18:47:07,376 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.70 ms. Allocated memory is still 203.4 MB. Free memory was 161.5 MB in the beginning and 159.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-17 18:47:07,377 INFO L168 Benchmark]: Boogie Preprocessor took 28.77 ms. Allocated memory is still 203.4 MB. Free memory was 159.5 MB in the beginning and 158.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-04-17 18:47:07,377 INFO L168 Benchmark]: RCFGBuilder took 417.96 ms. Allocated memory is still 203.4 MB. Free memory was 158.2 MB in the beginning and 138.4 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-04-17 18:47:07,377 INFO L168 Benchmark]: TraceAbstraction took 45607.33 ms. Allocated memory was 203.4 MB in the beginning and 422.6 MB in the end (delta: 219.2 MB). Free memory was 137.7 MB in the beginning and 137.9 MB in the end (delta: -169.2 kB). Peak memory consumption was 219.0 MB. Max. memory is 7.1 GB. [2020-04-17 18:47:07,379 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 140.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 717.27 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 99.6 MB in the beginning and 161.5 MB in the end (delta: -61.9 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 47.70 ms. Allocated memory is still 203.4 MB. Free memory was 161.5 MB in the beginning and 159.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.77 ms. Allocated memory is still 203.4 MB. Free memory was 159.5 MB in the beginning and 158.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 417.96 ms. Allocated memory is still 203.4 MB. Free memory was 158.2 MB in the beginning and 138.4 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 45607.33 ms. Allocated memory was 203.4 MB in the beginning and 422.6 MB in the end (delta: 219.2 MB). Free memory was 137.7 MB in the beginning and 137.9 MB in the end (delta: -169.2 kB). Peak memory consumption was 219.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.5s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - 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: 45.5s, OverallIterations: 71, TraceHistogramMax: 6, AutomataDifference: 17.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 1128 SDtfs, 3001 SDslu, 4524 SDs, 0 SdLazy, 4844 SolverSat, 2192 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2330 GetRequests, 835 SyntacticMatches, 64 SemanticMatches, 1431 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6903 ImplicationChecksByTransitivity, 16.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 71 MinimizatonAttempts, 1141 StatesRemovedByMinimization, 68 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 7.4s InterpolantComputationTime, 2056 NumberOfCodeBlocks, 2056 NumberOfCodeBlocksAsserted, 254 NumberOfCheckSat, 1919 ConstructedInterpolants, 0 QuantifiedInterpolants, 119241 SizeOfPredicates, 458 NumberOfNonLiveVariables, 6614 ConjunctsInSsa, 737 ConjunctsInUnsatCore, 137 InterpolantComputations, 7 PerfectInterpolantSequences, 70/1440 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...