/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c7e336b [2020-10-05 22:21:46,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-05 22:21:46,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-05 22:21:46,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-05 22:21:46,130 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-05 22:21:46,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-05 22:21:46,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-05 22:21:46,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-05 22:21:46,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-05 22:21:46,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-05 22:21:46,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-05 22:21:46,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-05 22:21:46,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-05 22:21:46,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-05 22:21:46,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-05 22:21:46,168 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-05 22:21:46,170 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-05 22:21:46,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-05 22:21:46,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-05 22:21:46,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-05 22:21:46,186 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-05 22:21:46,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-05 22:21:46,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-05 22:21:46,190 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-05 22:21:46,196 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-05 22:21:46,204 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-05 22:21:46,205 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-05 22:21:46,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-05 22:21:46,206 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-05 22:21:46,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-05 22:21:46,208 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-05 22:21:46,209 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-05 22:21:46,209 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-05 22:21:46,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-05 22:21:46,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-05 22:21:46,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-05 22:21:46,213 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-05 22:21:46,259 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-05 22:21:46,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-05 22:21:46,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-05 22:21:46,261 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-05 22:21:46,262 INFO L138 SettingsManager]: * Use SBE=true [2020-10-05 22:21:46,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-05 22:21:46,262 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-05 22:21:46,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-05 22:21:46,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-05 22:21:46,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-05 22:21:46,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-05 22:21:46,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-05 22:21:46,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-05 22:21:46,265 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-05 22:21:46,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-05 22:21:46,266 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-05 22:21:46,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-05 22:21:46,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-05 22:21:46,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-05 22:21:46,266 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-05 22:21:46,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-05 22:21:46,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-05 22:21:46,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-05 22:21:46,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-05 22:21:46,267 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-05 22:21:46,268 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-05 22:21:46,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-05 22:21:46,268 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-05 22:21:46,268 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-05 22:21:46,268 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-05 22:21:46,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-05 22:21:46,621 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-05 22:21:46,625 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-05 22:21:46,626 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-05 22:21:46,627 INFO L275 PluginConnector]: CDTParser initialized [2020-10-05 22:21:46,628 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-10-05 22:21:46,694 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd1fe6d8b/d976dc3b136544f0b48652369c206cd4/FLAG598fc1506 [2020-10-05 22:21:47,249 INFO L306 CDTParser]: Found 1 translation units. [2020-10-05 22:21:47,252 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2020-10-05 22:21:47,271 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd1fe6d8b/d976dc3b136544f0b48652369c206cd4/FLAG598fc1506 [2020-10-05 22:21:47,602 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd1fe6d8b/d976dc3b136544f0b48652369c206cd4 [2020-10-05 22:21:47,613 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-05 22:21:47,615 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-05 22:21:47,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-05 22:21:47,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-05 22:21:47,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-05 22:21:47,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 10:21:47" (1/1) ... [2020-10-05 22:21:47,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49f0cf70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:47, skipping insertion in model container [2020-10-05 22:21:47,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 10:21:47" (1/1) ... [2020-10-05 22:21:47,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-05 22:21:47,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-05 22:21:48,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-05 22:21:48,167 INFO L203 MainTranslator]: Completed pre-run [2020-10-05 22:21:48,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-05 22:21:48,311 INFO L208 MainTranslator]: Completed translation [2020-10-05 22:21:48,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48 WrapperNode [2020-10-05 22:21:48,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-05 22:21:48,313 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-05 22:21:48,313 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-05 22:21:48,313 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-05 22:21:48,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48" (1/1) ... [2020-10-05 22:21:48,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48" (1/1) ... [2020-10-05 22:21:48,364 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-05 22:21:48,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-05 22:21:48,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-05 22:21:48,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-05 22:21:48,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48" (1/1) ... [2020-10-05 22:21:48,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48" (1/1) ... [2020-10-05 22:21:48,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48" (1/1) ... [2020-10-05 22:21:48,377 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48" (1/1) ... [2020-10-05 22:21:48,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48" (1/1) ... [2020-10-05 22:21:48,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48" (1/1) ... [2020-10-05 22:21:48,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48" (1/1) ... [2020-10-05 22:21:48,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-05 22:21:48,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-05 22:21:48,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-05 22:21:48,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-05 22:21:48,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-05 22:21:48,467 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-05 22:21:48,467 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-05 22:21:48,468 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-05 22:21:48,468 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-05 22:21:48,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-05 22:21:48,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-05 22:21:48,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-05 22:21:48,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-05 22:21:48,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-05 22:21:48,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-05 22:21:48,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-05 22:21:48,471 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-05 22:21:48,800 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-05 22:21:48,801 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-05 22:21:48,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 10:21:48 BoogieIcfgContainer [2020-10-05 22:21:48,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-05 22:21:48,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-05 22:21:48,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-05 22:21:48,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-05 22:21:48,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 10:21:47" (1/3) ... [2020-10-05 22:21:48,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2536ac5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 10:21:48, skipping insertion in model container [2020-10-05 22:21:48,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 10:21:48" (2/3) ... [2020-10-05 22:21:48,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2536ac5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 10:21:48, skipping insertion in model container [2020-10-05 22:21:48,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 10:21:48" (3/3) ... [2020-10-05 22:21:48,816 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-10-05 22:21:48,835 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-05 22:21:48,836 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-05 22:21:48,847 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-05 22:21:48,848 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-05 22:21:48,881 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,882 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,882 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,882 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,883 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,883 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,884 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,884 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,884 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,885 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,885 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,885 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,886 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,886 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,887 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,887 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,890 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,891 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,891 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,892 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,892 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,892 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,892 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,896 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,896 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,897 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,897 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,898 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,908 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,909 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,909 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,910 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,912 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,913 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,939 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,939 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,939 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,940 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,940 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,940 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 22:21:48,956 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-05 22:21:48,977 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 22:21:48,978 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 22:21:48,978 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-05 22:21:48,978 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-05 22:21:48,978 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 22:21:48,978 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 22:21:48,979 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 22:21:48,979 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 22:21:48,997 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-05 22:21:48,999 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-05 22:21:49,048 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-05 22:21:49,049 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-05 22:21:49,056 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-05 22:21:49,058 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-05 22:21:49,078 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-05 22:21:49,079 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-05 22:21:49,080 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-05 22:21:49,082 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-10-05 22:21:49,083 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-10-05 22:21:50,272 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-05 22:21:50,529 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-10-05 22:21:50,529 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-10-05 22:21:50,537 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-05 22:21:50,560 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-05 22:21:50,562 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-05 22:21:50,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-05 22:21:50,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:50,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-05 22:21:50,594 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:50,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:50,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-05 22:21:50,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:50,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078044092] [2020-10-05 22:21:50,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:50,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078044092] [2020-10-05 22:21:50,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:21:50,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 22:21:50,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612098991] [2020-10-05 22:21:50,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 22:21:50,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:50,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 22:21:50,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-05 22:21:50,860 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-05 22:21:50,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:50,935 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-05 22:21:50,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 22:21:50,937 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-05 22:21:50,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:50,951 INFO L225 Difference]: With dead ends: 75 [2020-10-05 22:21:50,951 INFO L226 Difference]: Without dead ends: 42 [2020-10-05 22:21:50,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-05 22:21:50,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-05 22:21:50,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-05 22:21:50,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-05 22:21:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-05 22:21:50,998 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-05 22:21:50,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:50,998 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-05 22:21:50,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 22:21:50,999 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-05 22:21:51,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-05 22:21:51,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:51,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:51,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-05 22:21:51,001 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:51,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:51,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-05 22:21:51,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:51,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632735552] [2020-10-05 22:21:51,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:51,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:51,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632735552] [2020-10-05 22:21:51,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:21:51,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 22:21:51,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801904174] [2020-10-05 22:21:51,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-05 22:21:51,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:51,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-05 22:21:51,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-05 22:21:51,097 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-05 22:21:51,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:51,133 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-05 22:21:51,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 22:21:51,134 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-05 22:21:51,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:51,135 INFO L225 Difference]: With dead ends: 56 [2020-10-05 22:21:51,135 INFO L226 Difference]: Without dead ends: 50 [2020-10-05 22:21:51,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-05 22:21:51,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-05 22:21:51,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-05 22:21:51,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-05 22:21:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-05 22:21:51,145 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-05 22:21:51,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:51,146 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-05 22:21:51,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-05 22:21:51,146 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-05 22:21:51,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:21:51,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:51,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:51,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-05 22:21:51,148 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:51,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:51,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-05 22:21:51,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:51,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679786017] [2020-10-05 22:21:51,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:51,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679786017] [2020-10-05 22:21:51,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:21:51,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 22:21:51,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711503792] [2020-10-05 22:21:51,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 22:21:51,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:51,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 22:21:51,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-05 22:21:51,251 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-05 22:21:51,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:51,358 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-05 22:21:51,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:21:51,359 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 22:21:51,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:51,360 INFO L225 Difference]: With dead ends: 78 [2020-10-05 22:21:51,360 INFO L226 Difference]: Without dead ends: 71 [2020-10-05 22:21:51,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:21:51,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-05 22:21:51,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-05 22:21:51,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 22:21:51,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-05 22:21:51,370 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-05 22:21:51,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:51,371 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-05 22:21:51,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 22:21:51,371 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-05 22:21:51,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:21:51,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:51,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:51,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-05 22:21:51,373 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:51,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:51,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-05 22:21:51,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:51,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515536251] [2020-10-05 22:21:51,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:51,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515536251] [2020-10-05 22:21:51,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:21:51,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 22:21:51,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869112901] [2020-10-05 22:21:51,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 22:21:51,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:51,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 22:21:51,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-05 22:21:51,439 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-05 22:21:51,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:51,549 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-05 22:21:51,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 22:21:51,551 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 22:21:51,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:51,552 INFO L225 Difference]: With dead ends: 54 [2020-10-05 22:21:51,552 INFO L226 Difference]: Without dead ends: 43 [2020-10-05 22:21:51,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:21:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-05 22:21:51,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-05 22:21:51,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-05 22:21:51,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-05 22:21:51,569 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-05 22:21:51,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:51,570 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-05 22:21:51,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 22:21:51,572 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-05 22:21:51,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 22:21:51,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:51,573 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:51,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-05 22:21:51,574 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:51,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:51,574 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-05 22:21:51,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:51,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999727411] [2020-10-05 22:21:51,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:51,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:51,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999727411] [2020-10-05 22:21:51,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 22:21:51,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 22:21:51,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825961858] [2020-10-05 22:21:51,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 22:21:51,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:51,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 22:21:51,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-05 22:21:51,676 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-05 22:21:51,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:51,744 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-05 22:21:51,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 22:21:51,744 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 22:21:51,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:51,745 INFO L225 Difference]: With dead ends: 57 [2020-10-05 22:21:51,745 INFO L226 Difference]: Without dead ends: 51 [2020-10-05 22:21:51,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:21:51,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-05 22:21:51,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-05 22:21:51,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-05 22:21:51,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-05 22:21:51,751 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-05 22:21:51,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:51,752 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-05 22:21:51,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 22:21:51,752 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-05 22:21:51,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:21:51,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:51,753 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:51,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-05 22:21:51,753 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:51,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:51,754 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-05 22:21:51,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:51,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574321987] [2020-10-05 22:21:51,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:51,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574321987] [2020-10-05 22:21:51,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496298497] [2020-10-05 22:21:51,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:51,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:21:51,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:51,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:21:51,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:51,967 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:21:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:51,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:51,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-05 22:21:51,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659302566] [2020-10-05 22:21:51,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 22:21:51,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:51,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 22:21:51,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-05 22:21:51,984 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-05 22:21:52,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:52,132 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-05 22:21:52,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:21:52,132 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-05 22:21:52,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:52,133 INFO L225 Difference]: With dead ends: 48 [2020-10-05 22:21:52,133 INFO L226 Difference]: Without dead ends: 43 [2020-10-05 22:21:52,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:21:52,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-05 22:21:52,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-05 22:21:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-05 22:21:52,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-05 22:21:52,143 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-05 22:21:52,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:52,143 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-05 22:21:52,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 22:21:52,143 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-05 22:21:52,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:21:52,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:52,146 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:52,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-05 22:21:52,358 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:52,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:52,359 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-05 22:21:52,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:52,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304805922] [2020-10-05 22:21:52,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:52,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304805922] [2020-10-05 22:21:52,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882292746] [2020-10-05 22:21:52,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:52,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:21:52,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:52,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:21:52,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:52,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:52,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-05 22:21:52,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011648765] [2020-10-05 22:21:52,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-05 22:21:52,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:52,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-05 22:21:52,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-05 22:21:52,518 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-05 22:21:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:52,611 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-05 22:21:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:21:52,611 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-05 22:21:52,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:52,612 INFO L225 Difference]: With dead ends: 54 [2020-10-05 22:21:52,612 INFO L226 Difference]: Without dead ends: 48 [2020-10-05 22:21:52,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:21:52,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-05 22:21:52,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-05 22:21:52,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-05 22:21:52,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-05 22:21:52,622 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-05 22:21:52,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:52,622 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-05 22:21:52,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-05 22:21:52,623 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-05 22:21:52,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:21:52,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:52,625 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:52,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:52,827 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:52,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:52,827 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-05 22:21:52,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:52,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907685937] [2020-10-05 22:21:52,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:52,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907685937] [2020-10-05 22:21:52,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504848681] [2020-10-05 22:21:52,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:52,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:21:52,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:52,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:21:52,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:52,973 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:52,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:52,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-05 22:21:52,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548065881] [2020-10-05 22:21:52,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 22:21:52,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:52,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 22:21:52,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-05 22:21:52,999 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-05 22:21:53,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:53,128 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-05 22:21:53,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 22:21:53,130 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-05 22:21:53,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:53,131 INFO L225 Difference]: With dead ends: 58 [2020-10-05 22:21:53,131 INFO L226 Difference]: Without dead ends: 52 [2020-10-05 22:21:53,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:21:53,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-05 22:21:53,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-05 22:21:53,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-05 22:21:53,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-05 22:21:53,145 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-05 22:21:53,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:53,145 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-05 22:21:53,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 22:21:53,145 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-05 22:21:53,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:21:53,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:53,148 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:53,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:53,362 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:53,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:53,363 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-05 22:21:53,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:53,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876606749] [2020-10-05 22:21:53,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:53,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876606749] [2020-10-05 22:21:53,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892262354] [2020-10-05 22:21:53,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:53,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:21:53,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:53,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:53,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-05 22:21:53,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124963702] [2020-10-05 22:21:53,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-05 22:21:53,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:53,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-05 22:21:53,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-05 22:21:53,496 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-05 22:21:53,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:53,650 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-05 22:21:53,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:21:53,650 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-05 22:21:53,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:53,651 INFO L225 Difference]: With dead ends: 78 [2020-10-05 22:21:53,652 INFO L226 Difference]: Without dead ends: 72 [2020-10-05 22:21:53,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:21:53,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-05 22:21:53,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-05 22:21:53,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 22:21:53,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-05 22:21:53,658 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-05 22:21:53,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:53,659 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-05 22:21:53,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-05 22:21:53,659 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-05 22:21:53,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 22:21:53,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:53,660 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:53,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:53,873 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:53,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:53,874 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-05 22:21:53,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:53,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760475432] [2020-10-05 22:21:53,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:53,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760475432] [2020-10-05 22:21:53,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080700132] [2020-10-05 22:21:53,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:53,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:21:53,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:53,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:21:53,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:54,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:54,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-05 22:21:54,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278394455] [2020-10-05 22:21:54,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 22:21:54,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:54,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 22:21:54,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-05 22:21:54,018 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-05 22:21:54,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:54,186 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-05 22:21:54,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:21:54,187 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-05 22:21:54,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:54,188 INFO L225 Difference]: With dead ends: 62 [2020-10-05 22:21:54,188 INFO L226 Difference]: Without dead ends: 54 [2020-10-05 22:21:54,188 INFO L675 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 [2020-10-05 22:21:54,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-05 22:21:54,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-05 22:21:54,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-05 22:21:54,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-05 22:21:54,193 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-05 22:21:54,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:54,193 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-05 22:21:54,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 22:21:54,193 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-05 22:21:54,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:21:54,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:54,194 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:54,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-05 22:21:54,407 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:54,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:54,408 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-05 22:21:54,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:54,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325295378] [2020-10-05 22:21:54,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:54,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325295378] [2020-10-05 22:21:54,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924569935] [2020-10-05 22:21:54,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:54,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 22:21:54,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:54,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:21:54,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:54,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:54,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-05 22:21:54,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057800496] [2020-10-05 22:21:54,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 22:21:54,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:54,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 22:21:54,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-05 22:21:54,534 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-05 22:21:54,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:54,639 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-05 22:21:54,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:21:54,640 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-05 22:21:54,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:54,641 INFO L225 Difference]: With dead ends: 64 [2020-10-05 22:21:54,641 INFO L226 Difference]: Without dead ends: 58 [2020-10-05 22:21:54,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:21:54,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-05 22:21:54,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-05 22:21:54,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-05 22:21:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-05 22:21:54,650 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-05 22:21:54,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:54,651 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-05 22:21:54,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 22:21:54,656 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-05 22:21:54,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:21:54,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:54,657 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:54,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:54,858 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:54,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:54,859 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-05 22:21:54,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:54,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104232814] [2020-10-05 22:21:54,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:54,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104232814] [2020-10-05 22:21:54,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787582661] [2020-10-05 22:21:54,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:54,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:21:54,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:54,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:21:54,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:54,998 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:55,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:55,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-05 22:21:55,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444588695] [2020-10-05 22:21:55,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:21:55,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:55,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:21:55,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:21:55,013 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-05 22:21:55,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:55,184 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-05 22:21:55,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:21:55,185 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-05 22:21:55,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:55,185 INFO L225 Difference]: With dead ends: 61 [2020-10-05 22:21:55,186 INFO L226 Difference]: Without dead ends: 55 [2020-10-05 22:21:55,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:21:55,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-05 22:21:55,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-05 22:21:55,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-05 22:21:55,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-05 22:21:55,190 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-05 22:21:55,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:55,190 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-05 22:21:55,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:21:55,191 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-05 22:21:55,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:21:55,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:55,192 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:55,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:55,403 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:55,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:55,404 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-05 22:21:55,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:55,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390185792] [2020-10-05 22:21:55,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:55,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390185792] [2020-10-05 22:21:55,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432121300] [2020-10-05 22:21:55,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:55,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:21:55,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:55,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:21:55,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:55,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:55,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-05 22:21:55,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063602848] [2020-10-05 22:21:55,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 22:21:55,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:55,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 22:21:55,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-05 22:21:55,558 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-05 22:21:55,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:55,695 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-05 22:21:55,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:21:55,696 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-05 22:21:55,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:55,697 INFO L225 Difference]: With dead ends: 77 [2020-10-05 22:21:55,697 INFO L226 Difference]: Without dead ends: 71 [2020-10-05 22:21:55,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:21:55,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-05 22:21:55,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-05 22:21:55,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-05 22:21:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-05 22:21:55,701 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-05 22:21:55,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:55,702 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-05 22:21:55,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 22:21:55,702 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-05 22:21:55,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:21:55,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:55,703 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:55,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-05 22:21:55,914 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:55,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:55,915 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-05 22:21:55,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:55,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102125475] [2020-10-05 22:21:55,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:55,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102125475] [2020-10-05 22:21:55,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150763038] [2020-10-05 22:21:55,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:56,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 22:21:56,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:56,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:21:56,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:56,067 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:56,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:56,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-05 22:21:56,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552555626] [2020-10-05 22:21:56,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:21:56,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:56,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:21:56,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:21:56,084 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-05 22:21:56,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:56,272 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-10-05 22:21:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:21:56,272 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-05 22:21:56,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:56,273 INFO L225 Difference]: With dead ends: 58 [2020-10-05 22:21:56,273 INFO L226 Difference]: Without dead ends: 50 [2020-10-05 22:21:56,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:21:56,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-05 22:21:56,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-05 22:21:56,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-05 22:21:56,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-05 22:21:56,276 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-05 22:21:56,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:56,276 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-05 22:21:56,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:21:56,277 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-05 22:21:56,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 22:21:56,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:56,277 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:56,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:56,478 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:56,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:56,479 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-05 22:21:56,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:56,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133002941] [2020-10-05 22:21:56,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:56,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:56,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133002941] [2020-10-05 22:21:56,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888345304] [2020-10-05 22:21:56,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:56,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 22:21:56,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:56,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:21:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:56,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:56,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-05 22:21:56,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446603963] [2020-10-05 22:21:56,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:21:56,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:56,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:21:56,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:21:56,614 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-05 22:21:56,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:56,802 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-05 22:21:56,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:21:56,803 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-05 22:21:56,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:56,804 INFO L225 Difference]: With dead ends: 60 [2020-10-05 22:21:56,804 INFO L226 Difference]: Without dead ends: 55 [2020-10-05 22:21:56,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:21:56,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-05 22:21:56,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-05 22:21:56,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 22:21:56,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-05 22:21:56,812 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-05 22:21:56,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:56,812 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-05 22:21:56,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:21:56,813 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-05 22:21:56,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:56,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:56,815 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:57,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-05 22:21:57,022 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:57,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:57,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-05 22:21:57,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:57,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471828470] [2020-10-05 22:21:57,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:57,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471828470] [2020-10-05 22:21:57,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185701391] [2020-10-05 22:21:57,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:57,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:21:57,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:57,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:21:57,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:57,171 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:21:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:57,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:57,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-05 22:21:57,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291493278] [2020-10-05 22:21:57,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:21:57,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:57,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:21:57,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:21:57,206 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-05 22:21:57,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:57,400 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-05 22:21:57,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:21:57,402 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-05 22:21:57,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:57,403 INFO L225 Difference]: With dead ends: 54 [2020-10-05 22:21:57,403 INFO L226 Difference]: Without dead ends: 49 [2020-10-05 22:21:57,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:21:57,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-05 22:21:57,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-05 22:21:57,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-05 22:21:57,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-05 22:21:57,408 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-05 22:21:57,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:57,408 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-05 22:21:57,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:21:57,408 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-05 22:21:57,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:57,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:57,409 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:57,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-05 22:21:57,618 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:57,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:57,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-05 22:21:57,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:57,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348187805] [2020-10-05 22:21:57,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:57,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348187805] [2020-10-05 22:21:57,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979240493] [2020-10-05 22:21:57,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:57,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:21:57,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:57,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:21:57,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:57,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:57,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-05 22:21:57,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170880302] [2020-10-05 22:21:57,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:21:57,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:57,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:21:57,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:21:57,755 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-05 22:21:57,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:57,852 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-05 22:21:57,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 22:21:57,853 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-05 22:21:57,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:57,854 INFO L225 Difference]: With dead ends: 60 [2020-10-05 22:21:57,854 INFO L226 Difference]: Without dead ends: 54 [2020-10-05 22:21:57,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:21:57,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-05 22:21:57,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-05 22:21:57,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 22:21:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-05 22:21:57,858 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-05 22:21:57,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:57,859 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-05 22:21:57,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:21:57,859 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-05 22:21:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:57,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:57,859 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:58,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-05 22:21:58,069 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:58,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:58,069 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-05 22:21:58,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:58,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302142202] [2020-10-05 22:21:58,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:58,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302142202] [2020-10-05 22:21:58,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925495567] [2020-10-05 22:21:58,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:58,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:21:58,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:58,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:21:58,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:58,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:58,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:58,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-05 22:21:58,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939408385] [2020-10-05 22:21:58,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:21:58,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:58,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:21:58,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:21:58,208 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-05 22:21:58,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:58,353 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-05 22:21:58,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 22:21:58,354 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-05 22:21:58,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:58,355 INFO L225 Difference]: With dead ends: 66 [2020-10-05 22:21:58,355 INFO L226 Difference]: Without dead ends: 60 [2020-10-05 22:21:58,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-05 22:21:58,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-05 22:21:58,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-05 22:21:58,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-05 22:21:58,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-05 22:21:58,358 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-05 22:21:58,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:58,358 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-05 22:21:58,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:21:58,359 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-05 22:21:58,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:58,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:58,359 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:58,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-05 22:21:58,563 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:58,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:58,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-05 22:21:58,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:58,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164505578] [2020-10-05 22:21:58,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:58,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164505578] [2020-10-05 22:21:58,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433283270] [2020-10-05 22:21:58,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:58,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:21:58,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:58,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:21:58,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:58,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:58,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-05 22:21:58,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079864854] [2020-10-05 22:21:58,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:21:58,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:58,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:21:58,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:21:58,719 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-05 22:21:58,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:58,885 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-05 22:21:58,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:21:58,885 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-05 22:21:58,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:58,886 INFO L225 Difference]: With dead ends: 67 [2020-10-05 22:21:58,886 INFO L226 Difference]: Without dead ends: 61 [2020-10-05 22:21:58,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:21:58,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-05 22:21:58,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-05 22:21:58,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-05 22:21:58,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-05 22:21:58,894 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-05 22:21:58,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:58,894 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-05 22:21:58,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:21:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-05 22:21:58,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:58,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:58,896 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:59,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:59,106 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:59,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:59,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-05 22:21:59,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:59,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966487604] [2020-10-05 22:21:59,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:59,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966487604] [2020-10-05 22:21:59,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224129781] [2020-10-05 22:21:59,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:59,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:21:59,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:21:59,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:21:59,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:59,245 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:21:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:59,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:59,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-05 22:21:59,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068772238] [2020-10-05 22:21:59,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:21:59,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:59,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:21:59,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:21:59,261 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-05 22:21:59,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:59,445 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-05 22:21:59,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:21:59,446 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-05 22:21:59,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:59,447 INFO L225 Difference]: With dead ends: 69 [2020-10-05 22:21:59,447 INFO L226 Difference]: Without dead ends: 63 [2020-10-05 22:21:59,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:21:59,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-05 22:21:59,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-05 22:21:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 22:21:59,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-05 22:21:59,451 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-05 22:21:59,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:59,451 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-05 22:21:59,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:21:59,451 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-05 22:21:59,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:59,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:59,452 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:21:59,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:59,663 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:21:59,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:21:59,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-05 22:21:59,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:21:59,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126894673] [2020-10-05 22:21:59,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:21:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:59,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126894673] [2020-10-05 22:21:59,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670109766] [2020-10-05 22:21:59,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:21:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:21:59,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:21:59,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:21:59,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:21:59,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:21:59,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-05 22:21:59,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186161171] [2020-10-05 22:21:59,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 22:21:59,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:21:59,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 22:21:59,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-05 22:21:59,806 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-05 22:21:59,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:21:59,979 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-05 22:21:59,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:21:59,984 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-05 22:21:59,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:21:59,985 INFO L225 Difference]: With dead ends: 88 [2020-10-05 22:21:59,985 INFO L226 Difference]: Without dead ends: 82 [2020-10-05 22:21:59,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:21:59,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-05 22:21:59,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-05 22:21:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-05 22:21:59,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-05 22:21:59,990 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-05 22:21:59,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:21:59,991 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-05 22:21:59,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 22:21:59,993 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-05 22:21:59,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 22:21:59,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:21:59,994 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:00,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:00,205 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:00,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:00,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-05 22:22:00,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:00,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556310266] [2020-10-05 22:22:00,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:00,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556310266] [2020-10-05 22:22:00,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895494660] [2020-10-05 22:22:00,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:00,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:00,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:00,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 22:22:00,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:00,331 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:00,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:00,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-05 22:22:00,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582217265] [2020-10-05 22:22:00,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:22:00,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:00,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:22:00,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:22:00,342 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-05 22:22:00,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:00,587 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-05 22:22:00,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:22:00,587 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-05 22:22:00,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:00,588 INFO L225 Difference]: With dead ends: 69 [2020-10-05 22:22:00,588 INFO L226 Difference]: Without dead ends: 61 [2020-10-05 22:22:00,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:22:00,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-05 22:22:00,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-05 22:22:00,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-05 22:22:00,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-05 22:22:00,592 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-05 22:22:00,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:00,592 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-05 22:22:00,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:22:00,593 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-05 22:22:00,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:22:00,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:00,593 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:00,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-05 22:22:00,799 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:00,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:00,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-05 22:22:00,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:00,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099050423] [2020-10-05 22:22:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:00,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099050423] [2020-10-05 22:22:00,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024289693] [2020-10-05 22:22:00,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:00,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:22:00,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:00,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:00,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:00,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:00,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-05 22:22:00,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460198571] [2020-10-05 22:22:00,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:22:00,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:00,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:22:00,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:22:00,941 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-05 22:22:01,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:01,080 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-05 22:22:01,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:22:01,080 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-05 22:22:01,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:01,081 INFO L225 Difference]: With dead ends: 74 [2020-10-05 22:22:01,081 INFO L226 Difference]: Without dead ends: 68 [2020-10-05 22:22:01,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-05 22:22:01,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-05 22:22:01,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-05 22:22:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-05 22:22:01,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-05 22:22:01,086 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-05 22:22:01,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:01,086 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-05 22:22:01,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:22:01,087 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-05 22:22:01,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:22:01,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:01,087 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:01,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-05 22:22:01,298 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:01,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:01,298 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-05 22:22:01,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:01,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813510239] [2020-10-05 22:22:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:01,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813510239] [2020-10-05 22:22:01,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250294244] [2020-10-05 22:22:01,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:01,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:01,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:01,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:01,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:01,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:01,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:01,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-05 22:22:01,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133016621] [2020-10-05 22:22:01,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:01,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:01,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:01,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:01,497 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-05 22:22:01,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:01,672 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-05 22:22:01,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:22:01,672 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-05 22:22:01,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:01,673 INFO L225 Difference]: With dead ends: 71 [2020-10-05 22:22:01,673 INFO L226 Difference]: Without dead ends: 65 [2020-10-05 22:22:01,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:22:01,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-05 22:22:01,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-05 22:22:01,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 22:22:01,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-05 22:22:01,676 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-05 22:22:01,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:01,676 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-05 22:22:01,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:01,677 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-05 22:22:01,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:22:01,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:01,677 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:01,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-05 22:22:01,886 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:01,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:01,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-05 22:22:01,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:01,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930666528] [2020-10-05 22:22:01,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:01,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:01,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930666528] [2020-10-05 22:22:01,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686706802] [2020-10-05 22:22:01,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:02,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 22:22:02,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:02,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:02,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:02,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:02,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-05 22:22:02,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427650187] [2020-10-05 22:22:02,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:22:02,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:02,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:22:02,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:22:02,038 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-05 22:22:02,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:02,216 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-05 22:22:02,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:22:02,217 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-05 22:22:02,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:02,218 INFO L225 Difference]: With dead ends: 68 [2020-10-05 22:22:02,218 INFO L226 Difference]: Without dead ends: 62 [2020-10-05 22:22:02,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-05 22:22:02,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-05 22:22:02,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-05 22:22:02,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-05 22:22:02,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-05 22:22:02,222 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-05 22:22:02,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:02,222 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-05 22:22:02,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:22:02,222 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-05 22:22:02,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:22:02,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:02,223 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:02,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-05 22:22:02,430 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:02,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:02,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-05 22:22:02,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:02,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702029242] [2020-10-05 22:22:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:02,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702029242] [2020-10-05 22:22:02,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040390061] [2020-10-05 22:22:02,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:02,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 22:22:02,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:02,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:02,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:02,572 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:02,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:02,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-05 22:22:02,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213706902] [2020-10-05 22:22:02,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:02,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:02,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:02,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:02,587 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-05 22:22:02,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:02,864 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-05 22:22:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:22:02,865 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-05 22:22:02,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:02,866 INFO L225 Difference]: With dead ends: 67 [2020-10-05 22:22:02,866 INFO L226 Difference]: Without dead ends: 61 [2020-10-05 22:22:02,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:22:02,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-05 22:22:02,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-05 22:22:02,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 22:22:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-05 22:22:02,870 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-05 22:22:02,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:02,870 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-05 22:22:02,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:02,870 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-05 22:22:02,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:22:02,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:02,871 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:03,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-05 22:22:03,080 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:03,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:03,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-05 22:22:03,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:03,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79234825] [2020-10-05 22:22:03,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:03,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79234825] [2020-10-05 22:22:03,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955651034] [2020-10-05 22:22:03,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:03,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:03,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:03,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:03,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-05 22:22:03,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376496637] [2020-10-05 22:22:03,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 22:22:03,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:03,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 22:22:03,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:22:03,222 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-05 22:22:03,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:03,436 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-05 22:22:03,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:22:03,436 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-05 22:22:03,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:03,437 INFO L225 Difference]: With dead ends: 83 [2020-10-05 22:22:03,437 INFO L226 Difference]: Without dead ends: 77 [2020-10-05 22:22:03,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:22:03,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-05 22:22:03,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-05 22:22:03,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-05 22:22:03,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-05 22:22:03,442 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-05 22:22:03,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:03,442 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-05 22:22:03,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 22:22:03,442 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-05 22:22:03,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:22:03,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:03,444 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:03,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:03,644 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:03,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:03,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-05 22:22:03,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:03,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785005912] [2020-10-05 22:22:03,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:03,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785005912] [2020-10-05 22:22:03,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295237115] [2020-10-05 22:22:03,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:03,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:03,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:03,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:03,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:03,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:03,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:03,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-05 22:22:03,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498286499] [2020-10-05 22:22:03,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:03,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:03,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:03,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:03,783 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-05 22:22:04,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:04,084 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-05 22:22:04,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:22:04,085 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-05 22:22:04,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:04,085 INFO L225 Difference]: With dead ends: 64 [2020-10-05 22:22:04,085 INFO L226 Difference]: Without dead ends: 56 [2020-10-05 22:22:04,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:22:04,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-05 22:22:04,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-10-05 22:22:04,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-05 22:22:04,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-05 22:22:04,088 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-05 22:22:04,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:04,088 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-05 22:22:04,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:04,088 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-05 22:22:04,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 22:22:04,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:04,091 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:04,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-05 22:22:04,300 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:04,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:04,300 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-05 22:22:04,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:04,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314008304] [2020-10-05 22:22:04,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:04,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:04,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314008304] [2020-10-05 22:22:04,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826717621] [2020-10-05 22:22:04,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:04,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 22:22:04,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:04,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 22:22:04,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:04,425 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:22:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:04,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:04,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-05 22:22:04,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584427667] [2020-10-05 22:22:04,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:04,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:04,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:04,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:04,450 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-05 22:22:04,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:04,741 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-05 22:22:04,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:22:04,741 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-05 22:22:04,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:04,742 INFO L225 Difference]: With dead ends: 68 [2020-10-05 22:22:04,742 INFO L226 Difference]: Without dead ends: 63 [2020-10-05 22:22:04,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:22:04,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-05 22:22:04,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-05 22:22:04,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-05 22:22:04,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-05 22:22:04,745 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-05 22:22:04,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:04,745 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-05 22:22:04,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:04,745 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-05 22:22:04,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:04,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:04,746 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:04,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-05 22:22:04,955 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:04,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:04,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-05 22:22:04,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:04,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228883414] [2020-10-05 22:22:04,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:05,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228883414] [2020-10-05 22:22:05,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789452381] [2020-10-05 22:22:05,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:05,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:05,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:05,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:05,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:05,090 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:22:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:05,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:05,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 22:22:05,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066065853] [2020-10-05 22:22:05,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:05,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:05,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:05,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:05,103 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-05 22:22:05,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:05,406 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-05 22:22:05,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:22:05,409 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 22:22:05,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:05,410 INFO L225 Difference]: With dead ends: 60 [2020-10-05 22:22:05,410 INFO L226 Difference]: Without dead ends: 55 [2020-10-05 22:22:05,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:22:05,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-05 22:22:05,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-05 22:22:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-05 22:22:05,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-05 22:22:05,413 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-05 22:22:05,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:05,414 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-05 22:22:05,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:05,414 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-05 22:22:05,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:05,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:05,414 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:05,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:05,615 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:05,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:05,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-05 22:22:05,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:05,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996290933] [2020-10-05 22:22:05,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:05,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:05,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996290933] [2020-10-05 22:22:05,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364591763] [2020-10-05 22:22:05,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:05,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-05 22:22:05,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:05,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:05,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:05,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:05,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-05 22:22:05,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19375779] [2020-10-05 22:22:05,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:05,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:05,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:05,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:05,770 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-05 22:22:05,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:05,892 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-05 22:22:05,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 22:22:05,894 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-05 22:22:05,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:05,895 INFO L225 Difference]: With dead ends: 66 [2020-10-05 22:22:05,895 INFO L226 Difference]: Without dead ends: 60 [2020-10-05 22:22:05,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-05 22:22:05,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-05 22:22:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-05 22:22:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 22:22:05,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-05 22:22:05,898 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-05 22:22:05,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:05,899 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-05 22:22:05,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:05,899 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-05 22:22:05,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:05,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:05,899 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:06,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:06,103 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:06,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:06,103 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-05 22:22:06,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:06,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141061213] [2020-10-05 22:22:06,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:06,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141061213] [2020-10-05 22:22:06,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891387542] [2020-10-05 22:22:06,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:06,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-05 22:22:06,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:06,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:06,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:06,276 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:06,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:06,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 22:22:06,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000382327] [2020-10-05 22:22:06,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:06,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:06,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:06,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:06,293 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-05 22:22:06,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:06,564 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-05 22:22:06,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 22:22:06,565 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 22:22:06,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:06,566 INFO L225 Difference]: With dead ends: 74 [2020-10-05 22:22:06,567 INFO L226 Difference]: Without dead ends: 68 [2020-10-05 22:22:06,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-05 22:22:06,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-05 22:22:06,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-05 22:22:06,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-05 22:22:06,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-05 22:22:06,571 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-05 22:22:06,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:06,572 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-05 22:22:06,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:06,572 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-05 22:22:06,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:06,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:06,573 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:06,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-05 22:22:06,784 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:06,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:06,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-05 22:22:06,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:06,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787530656] [2020-10-05 22:22:06,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:06,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787530656] [2020-10-05 22:22:06,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262686377] [2020-10-05 22:22:06,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:06,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:06,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:06,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:06,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-05 22:22:06,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476477052] [2020-10-05 22:22:06,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:06,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:06,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:06,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:06,986 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-05 22:22:07,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:07,203 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-05 22:22:07,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:22:07,203 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-05 22:22:07,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:07,204 INFO L225 Difference]: With dead ends: 75 [2020-10-05 22:22:07,204 INFO L226 Difference]: Without dead ends: 69 [2020-10-05 22:22:07,205 INFO L675 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 [2020-10-05 22:22:07,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-05 22:22:07,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-05 22:22:07,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-05 22:22:07,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-05 22:22:07,207 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-05 22:22:07,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:07,208 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-05 22:22:07,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:07,208 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-05 22:22:07,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:07,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:07,208 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:07,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:07,418 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:07,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:07,418 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-05 22:22:07,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:07,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497055882] [2020-10-05 22:22:07,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:07,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497055882] [2020-10-05 22:22:07,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948815318] [2020-10-05 22:22:07,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:07,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:07,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:07,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:07,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:07,568 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:07,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:07,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 22:22:07,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793405217] [2020-10-05 22:22:07,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:07,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:07,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:07,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:07,580 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-05 22:22:07,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:07,829 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-05 22:22:07,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:22:07,836 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 22:22:07,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:07,836 INFO L225 Difference]: With dead ends: 79 [2020-10-05 22:22:07,836 INFO L226 Difference]: Without dead ends: 73 [2020-10-05 22:22:07,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:22:07,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-05 22:22:07,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-05 22:22:07,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 22:22:07,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-05 22:22:07,840 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-05 22:22:07,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:07,840 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-05 22:22:07,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:07,840 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-05 22:22:07,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:07,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:07,841 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:08,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-05 22:22:08,050 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:08,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:08,051 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-05 22:22:08,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:08,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278408477] [2020-10-05 22:22:08,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:08,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:08,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278408477] [2020-10-05 22:22:08,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815361897] [2020-10-05 22:22:08,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:08,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-05 22:22:08,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:08,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:08,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:08,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:08,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-05 22:22:08,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580923864] [2020-10-05 22:22:08,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:08,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:08,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:08,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:08,226 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-05 22:22:08,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:08,453 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-05 22:22:08,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:22:08,454 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-05 22:22:08,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:08,454 INFO L225 Difference]: With dead ends: 79 [2020-10-05 22:22:08,454 INFO L226 Difference]: Without dead ends: 73 [2020-10-05 22:22:08,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:22:08,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-05 22:22:08,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-05 22:22:08,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-05 22:22:08,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-05 22:22:08,458 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-05 22:22:08,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:08,459 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-05 22:22:08,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:08,459 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-05 22:22:08,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:08,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:08,459 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:08,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:08,670 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:08,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:08,670 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-05 22:22:08,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:08,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562429753] [2020-10-05 22:22:08,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:08,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562429753] [2020-10-05 22:22:08,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480462121] [2020-10-05 22:22:08,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:08,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:08,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:08,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:08,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:08,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:08,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:08,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 22:22:08,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330014173] [2020-10-05 22:22:08,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:08,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:08,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:08,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:08,849 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-05 22:22:09,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:09,156 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-05 22:22:09,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:22:09,157 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 22:22:09,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:09,158 INFO L225 Difference]: With dead ends: 76 [2020-10-05 22:22:09,158 INFO L226 Difference]: Without dead ends: 70 [2020-10-05 22:22:09,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:22:09,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-05 22:22:09,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-05 22:22:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-05 22:22:09,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-05 22:22:09,161 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-05 22:22:09,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:09,161 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-05 22:22:09,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:09,161 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-05 22:22:09,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:09,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:09,162 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:09,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-05 22:22:09,372 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:09,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:09,372 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-05 22:22:09,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:09,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939759588] [2020-10-05 22:22:09,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:09,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939759588] [2020-10-05 22:22:09,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520183141] [2020-10-05 22:22:09,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:09,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-05 22:22:09,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:09,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:09,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:09,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:09,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-05 22:22:09,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367709443] [2020-10-05 22:22:09,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 22:22:09,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:09,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 22:22:09,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-05 22:22:09,499 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-05 22:22:09,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:09,791 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-05 22:22:09,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:22:09,792 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-05 22:22:09,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:09,792 INFO L225 Difference]: With dead ends: 96 [2020-10-05 22:22:09,793 INFO L226 Difference]: Without dead ends: 90 [2020-10-05 22:22:09,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-05 22:22:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-05 22:22:09,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-05 22:22:09,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 22:22:09,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-05 22:22:09,796 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-05 22:22:09,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:09,797 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-05 22:22:09,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 22:22:09,797 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-05 22:22:09,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 22:22:09,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:09,798 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:09,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-05 22:22:09,999 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:09,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:09,999 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-05 22:22:09,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:10,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606303403] [2020-10-05 22:22:10,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:10,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606303403] [2020-10-05 22:22:10,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176276251] [2020-10-05 22:22:10,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:10,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-05 22:22:10,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:10,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 22:22:10,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:10,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:10,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:10,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:10,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 22:22:10,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298501538] [2020-10-05 22:22:10,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:10,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:10,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:10,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:10,169 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-05 22:22:10,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:10,541 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-05 22:22:10,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:22:10,542 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 22:22:10,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:10,543 INFO L225 Difference]: With dead ends: 77 [2020-10-05 22:22:10,543 INFO L226 Difference]: Without dead ends: 69 [2020-10-05 22:22:10,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:22:10,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-05 22:22:10,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-05 22:22:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-05 22:22:10,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-05 22:22:10,547 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-05 22:22:10,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:10,547 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-05 22:22:10,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:10,547 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-05 22:22:10,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:10,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:10,548 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:10,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-05 22:22:10,757 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:10,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:10,757 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-05 22:22:10,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:10,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165610071] [2020-10-05 22:22:10,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:10,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165610071] [2020-10-05 22:22:10,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062003520] [2020-10-05 22:22:10,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:10,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:10,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:10,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:10,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-05 22:22:10,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242573601] [2020-10-05 22:22:10,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:10,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:10,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:10,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:10,938 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-05 22:22:11,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:11,136 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-05 22:22:11,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:22:11,137 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-05 22:22:11,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:11,138 INFO L225 Difference]: With dead ends: 84 [2020-10-05 22:22:11,138 INFO L226 Difference]: Without dead ends: 78 [2020-10-05 22:22:11,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:22:11,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-05 22:22:11,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-05 22:22:11,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 22:22:11,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-05 22:22:11,143 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-05 22:22:11,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:11,144 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-05 22:22:11,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:11,145 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-05 22:22:11,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:11,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:11,146 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:11,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-05 22:22:11,356 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:11,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:11,357 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-05 22:22:11,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:11,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631308402] [2020-10-05 22:22:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:11,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:11,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631308402] [2020-10-05 22:22:11,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199451012] [2020-10-05 22:22:11,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:11,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:11,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:11,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:11,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:11,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:11,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:11,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 22:22:11,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813047303] [2020-10-05 22:22:11,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:11,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:11,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:11,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:11,541 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-05 22:22:11,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:11,792 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-05 22:22:11,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:22:11,792 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 22:22:11,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:11,793 INFO L225 Difference]: With dead ends: 81 [2020-10-05 22:22:11,793 INFO L226 Difference]: Without dead ends: 75 [2020-10-05 22:22:11,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:22:11,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-05 22:22:11,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-05 22:22:11,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 22:22:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-05 22:22:11,797 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-05 22:22:11,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:11,798 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-05 22:22:11,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:11,798 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-05 22:22:11,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:11,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:11,798 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:12,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-05 22:22:12,007 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:12,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:12,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-05 22:22:12,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:12,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467867242] [2020-10-05 22:22:12,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:12,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467867242] [2020-10-05 22:22:12,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904493560] [2020-10-05 22:22:12,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:12,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-05 22:22:12,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:12,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:12,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:12,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:12,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-05 22:22:12,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775376051] [2020-10-05 22:22:12,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:12,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:12,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:12,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:12,163 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-05 22:22:12,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:12,383 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-05 22:22:12,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:22:12,383 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-05 22:22:12,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:12,384 INFO L225 Difference]: With dead ends: 78 [2020-10-05 22:22:12,385 INFO L226 Difference]: Without dead ends: 72 [2020-10-05 22:22:12,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-05 22:22:12,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-05 22:22:12,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-05 22:22:12,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 22:22:12,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-05 22:22:12,389 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-05 22:22:12,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:12,389 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-05 22:22:12,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:12,389 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-05 22:22:12,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:12,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:12,390 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:12,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-05 22:22:12,592 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:12,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:12,592 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-05 22:22:12,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:12,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592570227] [2020-10-05 22:22:12,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:12,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592570227] [2020-10-05 22:22:12,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121762293] [2020-10-05 22:22:12,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:12,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:12,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:12,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:12,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:12,745 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:12,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:12,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 22:22:12,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488418847] [2020-10-05 22:22:12,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:12,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:12,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:12,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:12,762 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-05 22:22:13,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:13,095 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-05 22:22:13,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:22:13,095 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 22:22:13,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:13,096 INFO L225 Difference]: With dead ends: 77 [2020-10-05 22:22:13,096 INFO L226 Difference]: Without dead ends: 71 [2020-10-05 22:22:13,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-10-05 22:22:13,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-05 22:22:13,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-05 22:22:13,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 22:22:13,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-05 22:22:13,099 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-05 22:22:13,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:13,099 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-05 22:22:13,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:13,100 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-05 22:22:13,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:13,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:13,100 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:13,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-05 22:22:13,301 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:13,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:13,301 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-05 22:22:13,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:13,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516973055] [2020-10-05 22:22:13,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:13,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:13,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516973055] [2020-10-05 22:22:13,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606523626] [2020-10-05 22:22:13,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:13,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-05 22:22:13,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:13,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:13,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:13,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:13,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-05 22:22:13,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079687318] [2020-10-05 22:22:13,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:13,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:13,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:13,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:13,442 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-05 22:22:13,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:13,711 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-05 22:22:13,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:22:13,711 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-05 22:22:13,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:13,713 INFO L225 Difference]: With dead ends: 74 [2020-10-05 22:22:13,713 INFO L226 Difference]: Without dead ends: 68 [2020-10-05 22:22:13,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:22:13,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-05 22:22:13,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-05 22:22:13,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 22:22:13,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-05 22:22:13,717 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-05 22:22:13,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:13,718 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-05 22:22:13,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:13,718 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-05 22:22:13,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:13,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:13,718 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:13,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:13,928 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:13,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:13,928 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-05 22:22:13,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:13,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536154673] [2020-10-05 22:22:13,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:14,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:14,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536154673] [2020-10-05 22:22:14,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404743196] [2020-10-05 22:22:14,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:14,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-05 22:22:14,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:14,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:14,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:14,077 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:14,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:14,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 22:22:14,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873399848] [2020-10-05 22:22:14,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:14,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:14,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:14,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:14,094 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-05 22:22:14,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:14,451 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-05 22:22:14,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:22:14,452 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 22:22:14,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:14,453 INFO L225 Difference]: With dead ends: 73 [2020-10-05 22:22:14,453 INFO L226 Difference]: Without dead ends: 67 [2020-10-05 22:22:14,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-05 22:22:14,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-05 22:22:14,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-05 22:22:14,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 22:22:14,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-05 22:22:14,457 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-05 22:22:14,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:14,457 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-05 22:22:14,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:14,458 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-05 22:22:14,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:14,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:14,458 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:14,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-05 22:22:14,667 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:14,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:14,667 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-05 22:22:14,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:14,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461521986] [2020-10-05 22:22:14,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:14,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461521986] [2020-10-05 22:22:14,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71876675] [2020-10-05 22:22:14,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:14,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:14,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:14,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:14,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-05 22:22:14,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673867853] [2020-10-05 22:22:14,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 22:22:14,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:14,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 22:22:14,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-05 22:22:14,827 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-05 22:22:15,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:15,190 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-05 22:22:15,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:22:15,190 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-05 22:22:15,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:15,191 INFO L225 Difference]: With dead ends: 89 [2020-10-05 22:22:15,191 INFO L226 Difference]: Without dead ends: 83 [2020-10-05 22:22:15,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:22:15,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-05 22:22:15,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-05 22:22:15,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-05 22:22:15,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-05 22:22:15,195 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-05 22:22:15,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:15,195 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-05 22:22:15,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 22:22:15,195 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-05 22:22:15,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:15,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:15,196 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:15,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:15,405 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:15,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:15,406 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-05 22:22:15,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:15,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645261796] [2020-10-05 22:22:15,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:15,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645261796] [2020-10-05 22:22:15,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438794706] [2020-10-05 22:22:15,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:15,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:15,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:15,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:15,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:15,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:15,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 22:22:15,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904495319] [2020-10-05 22:22:15,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:15,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:15,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:15,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:15,571 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-05 22:22:15,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:15,936 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-10-05 22:22:15,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:22:15,937 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 22:22:15,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:15,937 INFO L225 Difference]: With dead ends: 68 [2020-10-05 22:22:15,937 INFO L226 Difference]: Without dead ends: 60 [2020-10-05 22:22:15,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-10-05 22:22:15,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-05 22:22:15,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-10-05 22:22:15,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-05 22:22:15,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-05 22:22:15,942 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-05 22:22:15,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:15,943 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-05 22:22:15,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:15,943 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-05 22:22:15,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 22:22:15,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:15,944 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:16,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-05 22:22:16,152 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:16,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:16,152 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-05 22:22:16,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:16,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109178373] [2020-10-05 22:22:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:16,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109178373] [2020-10-05 22:22:16,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742328397] [2020-10-05 22:22:16,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:16,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-05 22:22:16,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:16,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 22:22:16,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:16,284 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:22:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:16,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:16,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 22:22:16,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800166528] [2020-10-05 22:22:16,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:16,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:16,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:16,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:16,296 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-05 22:22:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:16,682 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-05 22:22:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:22:16,682 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 22:22:16,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:16,683 INFO L225 Difference]: With dead ends: 76 [2020-10-05 22:22:16,683 INFO L226 Difference]: Without dead ends: 71 [2020-10-05 22:22:16,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-05 22:22:16,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-05 22:22:16,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-05 22:22:16,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 22:22:16,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-05 22:22:16,686 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-05 22:22:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:16,687 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-05 22:22:16,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:16,687 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-05 22:22:16,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:16,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:16,687 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:16,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:16,890 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:16,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:16,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-05 22:22:16,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:16,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361233789] [2020-10-05 22:22:16,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:16,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361233789] [2020-10-05 22:22:16,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726566395] [2020-10-05 22:22:16,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:17,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:17,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:17,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:17,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:17,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:22:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:17,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:17,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 22:22:17,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401555796] [2020-10-05 22:22:17,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:17,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:17,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:17,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:17,095 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-05 22:22:17,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:17,519 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-05 22:22:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:22:17,519 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 22:22:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:17,520 INFO L225 Difference]: With dead ends: 66 [2020-10-05 22:22:17,520 INFO L226 Difference]: Without dead ends: 61 [2020-10-05 22:22:17,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-05 22:22:17,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-05 22:22:17,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-05 22:22:17,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 22:22:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-05 22:22:17,524 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-05 22:22:17,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:17,524 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-05 22:22:17,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:17,524 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-05 22:22:17,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:17,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:17,525 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:17,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-05 22:22:17,730 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:17,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:17,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-05 22:22:17,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:17,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347792039] [2020-10-05 22:22:17,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:17,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347792039] [2020-10-05 22:22:17,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488981650] [2020-10-05 22:22:17,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:17,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-05 22:22:17,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:17,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:17,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:17,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:17,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:17,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 22:22:17,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890721035] [2020-10-05 22:22:17,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:17,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:17,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:17,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:17,900 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-05 22:22:18,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:18,083 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-05 22:22:18,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 22:22:18,084 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 22:22:18,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:18,084 INFO L225 Difference]: With dead ends: 72 [2020-10-05 22:22:18,084 INFO L226 Difference]: Without dead ends: 66 [2020-10-05 22:22:18,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-05 22:22:18,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-05 22:22:18,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-05 22:22:18,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-05 22:22:18,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-05 22:22:18,088 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-05 22:22:18,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:18,089 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-05 22:22:18,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:18,089 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-05 22:22:18,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:18,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:18,089 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:18,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-05 22:22:18,300 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:18,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:18,300 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-05 22:22:18,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:18,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707204213] [2020-10-05 22:22:18,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:18,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707204213] [2020-10-05 22:22:18,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551962840] [2020-10-05 22:22:18,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:18,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-05 22:22:18,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:18,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:18,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:18,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:18,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:18,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 22:22:18,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906647809] [2020-10-05 22:22:18,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:18,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:18,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:18,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:18,477 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-05 22:22:18,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:18,703 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-05 22:22:18,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 22:22:18,704 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 22:22:18,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:18,705 INFO L225 Difference]: With dead ends: 82 [2020-10-05 22:22:18,705 INFO L226 Difference]: Without dead ends: 76 [2020-10-05 22:22:18,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-05 22:22:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-05 22:22:18,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-05 22:22:18,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-05 22:22:18,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-05 22:22:18,708 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-05 22:22:18,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:18,709 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-05 22:22:18,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:18,709 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-05 22:22:18,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:18,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:18,709 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:18,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-05 22:22:18,910 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:18,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:18,911 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-05 22:22:18,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:18,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145579446] [2020-10-05 22:22:18,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:19,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145579446] [2020-10-05 22:22:19,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685771626] [2020-10-05 22:22:19,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:19,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:19,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:19,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:19,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 22:22:19,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972984606] [2020-10-05 22:22:19,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:19,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:19,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:19,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:19,115 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-05 22:22:19,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:19,319 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-05 22:22:19,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:22:19,320 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 22:22:19,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:19,321 INFO L225 Difference]: With dead ends: 83 [2020-10-05 22:22:19,321 INFO L226 Difference]: Without dead ends: 77 [2020-10-05 22:22:19,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:22:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-05 22:22:19,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-05 22:22:19,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-05 22:22:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-05 22:22:19,324 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-05 22:22:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:19,324 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-05 22:22:19,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:19,324 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-05 22:22:19,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:19,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:19,326 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:19,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-05 22:22:19,533 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:19,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:19,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-05 22:22:19,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:19,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394124377] [2020-10-05 22:22:19,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:19,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394124377] [2020-10-05 22:22:19,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090808899] [2020-10-05 22:22:19,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:19,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:19,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:19,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:19,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:19,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:19,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:19,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 22:22:19,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312560770] [2020-10-05 22:22:19,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:19,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:19,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:19,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:19,832 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-05 22:22:20,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:20,191 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-05 22:22:20,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:22:20,195 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 22:22:20,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:20,196 INFO L225 Difference]: With dead ends: 89 [2020-10-05 22:22:20,196 INFO L226 Difference]: Without dead ends: 83 [2020-10-05 22:22:20,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:22:20,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-05 22:22:20,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-05 22:22:20,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-05 22:22:20,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-05 22:22:20,199 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-05 22:22:20,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:20,199 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-05 22:22:20,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:20,200 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-05 22:22:20,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:20,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:20,200 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:20,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:20,408 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:20,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:20,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-05 22:22:20,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:20,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746285395] [2020-10-05 22:22:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:20,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746285395] [2020-10-05 22:22:20,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828383832] [2020-10-05 22:22:20,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:20,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-05 22:22:20,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:20,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:20,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:20,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:20,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 22:22:20,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871287286] [2020-10-05 22:22:20,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:20,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:20,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:20,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:20,580 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-05 22:22:20,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:20,875 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-05 22:22:20,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:22:20,876 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 22:22:20,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:20,877 INFO L225 Difference]: With dead ends: 89 [2020-10-05 22:22:20,877 INFO L226 Difference]: Without dead ends: 83 [2020-10-05 22:22:20,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-05 22:22:20,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-05 22:22:20,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-05 22:22:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 22:22:20,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-05 22:22:20,881 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-05 22:22:20,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:20,881 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-05 22:22:20,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:20,882 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-05 22:22:20,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:20,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:20,882 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:21,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:21,084 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:21,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:21,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-05 22:22:21,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:21,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346292884] [2020-10-05 22:22:21,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:21,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346292884] [2020-10-05 22:22:21,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744215545] [2020-10-05 22:22:21,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:21,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:21,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:21,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:21,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:21,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:21,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:21,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 22:22:21,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207835500] [2020-10-05 22:22:21,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:21,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:21,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:21,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:21,275 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-05 22:22:21,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:21,624 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-05 22:22:21,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:22:21,625 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 22:22:21,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:21,625 INFO L225 Difference]: With dead ends: 86 [2020-10-05 22:22:21,625 INFO L226 Difference]: Without dead ends: 80 [2020-10-05 22:22:21,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-05 22:22:21,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-05 22:22:21,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-05 22:22:21,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 22:22:21,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-05 22:22:21,628 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-05 22:22:21,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:21,628 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-05 22:22:21,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:21,629 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-05 22:22:21,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:21,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:21,629 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:21,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-05 22:22:21,839 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:21,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:21,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-05 22:22:21,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:21,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346778794] [2020-10-05 22:22:21,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:21,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346778794] [2020-10-05 22:22:21,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302049694] [2020-10-05 22:22:21,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:21,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-05 22:22:21,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:21,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:21,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:22,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:22,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:22,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 22:22:22,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667851885] [2020-10-05 22:22:22,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:22,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:22,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:22,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:22,003 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-05 22:22:22,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:22,345 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-05 22:22:22,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 22:22:22,346 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 22:22:22,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:22,347 INFO L225 Difference]: With dead ends: 87 [2020-10-05 22:22:22,347 INFO L226 Difference]: Without dead ends: 81 [2020-10-05 22:22:22,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-10-05 22:22:22,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-05 22:22:22,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-05 22:22:22,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-05 22:22:22,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-05 22:22:22,351 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-05 22:22:22,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:22,352 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-05 22:22:22,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:22,352 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-05 22:22:22,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:22,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:22,353 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:22,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:22,561 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:22,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:22,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-05 22:22:22,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:22,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950588125] [2020-10-05 22:22:22,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:22,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950588125] [2020-10-05 22:22:22,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349697955] [2020-10-05 22:22:22,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:22,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-05 22:22:22,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:22,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:22,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:22,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:22,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:22,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:22,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 22:22:22,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253051986] [2020-10-05 22:22:22,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:22,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:22,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:22,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:22,733 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-05 22:22:23,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:23,156 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-05 22:22:23,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:22:23,157 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 22:22:23,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:23,158 INFO L225 Difference]: With dead ends: 84 [2020-10-05 22:22:23,158 INFO L226 Difference]: Without dead ends: 78 [2020-10-05 22:22:23,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-05 22:22:23,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-05 22:22:23,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-05 22:22:23,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 22:22:23,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-05 22:22:23,160 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-05 22:22:23,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:23,161 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-05 22:22:23,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:23,161 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-05 22:22:23,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:23,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:23,161 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:23,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-05 22:22:23,362 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:23,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:23,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-05 22:22:23,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:23,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38585641] [2020-10-05 22:22:23,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:23,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38585641] [2020-10-05 22:22:23,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046713989] [2020-10-05 22:22:23,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:23,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:23,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:23,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:23,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 22:22:23,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355344889] [2020-10-05 22:22:23,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 22:22:23,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:23,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 22:22:23,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-05 22:22:23,511 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-05 22:22:23,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:23,884 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-05 22:22:23,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 22:22:23,885 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 22:22:23,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:23,886 INFO L225 Difference]: With dead ends: 104 [2020-10-05 22:22:23,886 INFO L226 Difference]: Without dead ends: 98 [2020-10-05 22:22:23,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-05 22:22:23,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-05 22:22:23,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-05 22:22:23,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-05 22:22:23,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-05 22:22:23,890 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-05 22:22:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:23,890 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-05 22:22:23,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 22:22:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-05 22:22:23,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 22:22:23,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:23,891 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:24,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-05 22:22:24,100 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:24,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:24,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-05 22:22:24,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:24,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568246918] [2020-10-05 22:22:24,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:24,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568246918] [2020-10-05 22:22:24,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695748664] [2020-10-05 22:22:24,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:24,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:24,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:24,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 22:22:24,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:24,262 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:24,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:24,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 22:22:24,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196681262] [2020-10-05 22:22:24,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:24,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:24,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:24,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:24,275 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-05 22:22:24,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:24,754 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-05 22:22:24,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:22:24,755 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 22:22:24,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:24,756 INFO L225 Difference]: With dead ends: 85 [2020-10-05 22:22:24,756 INFO L226 Difference]: Without dead ends: 77 [2020-10-05 22:22:24,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 22:22:24,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-05 22:22:24,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-05 22:22:24,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-05 22:22:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-05 22:22:24,758 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-05 22:22:24,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:24,758 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-05 22:22:24,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:24,759 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-05 22:22:24,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:24,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:24,759 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:24,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-05 22:22:24,960 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:24,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:24,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-05 22:22:24,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:24,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300391153] [2020-10-05 22:22:24,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:25,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300391153] [2020-10-05 22:22:25,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146468206] [2020-10-05 22:22:25,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:25,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-05 22:22:25,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:25,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 22:22:25,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:25,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:25,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-05 22:22:25,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973306948] [2020-10-05 22:22:25,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:25,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:25,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:25,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:25,136 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-05 22:22:25,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:25,339 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-05 22:22:25,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 22:22:25,340 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-05 22:22:25,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:25,341 INFO L225 Difference]: With dead ends: 94 [2020-10-05 22:22:25,341 INFO L226 Difference]: Without dead ends: 88 [2020-10-05 22:22:25,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-05 22:22:25,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-05 22:22:25,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-05 22:22:25,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 22:22:25,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-05 22:22:25,344 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-05 22:22:25,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:25,344 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-05 22:22:25,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:25,344 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-05 22:22:25,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:25,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:25,344 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:25,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-05 22:22:25,545 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:25,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:25,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-05 22:22:25,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:25,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960102587] [2020-10-05 22:22:25,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:25,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:25,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:25,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960102587] [2020-10-05 22:22:25,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339303736] [2020-10-05 22:22:25,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:25,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:25,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:25,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 22:22:25,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:25,736 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:25,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:25,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 22:22:25,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379846792] [2020-10-05 22:22:25,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:22:25,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:25,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:22:25,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:22:25,749 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-05 22:22:26,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:26,059 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-05 22:22:26,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 22:22:26,060 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 22:22:26,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:26,061 INFO L225 Difference]: With dead ends: 91 [2020-10-05 22:22:26,061 INFO L226 Difference]: Without dead ends: 85 [2020-10-05 22:22:26,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-05 22:22:26,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-05 22:22:26,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-05 22:22:26,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 22:22:26,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-05 22:22:26,064 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-05 22:22:26,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:26,064 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-05 22:22:26,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:22:26,064 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-05 22:22:26,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:26,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:26,065 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:26,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-05 22:22:26,266 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:26,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:26,266 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-05 22:22:26,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:26,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563697270] [2020-10-05 22:22:26,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:26,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563697270] [2020-10-05 22:22:26,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58643939] [2020-10-05 22:22:26,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:26,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-05 22:22:26,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:26,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 22:22:26,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:26,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:26,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-05 22:22:26,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309827197] [2020-10-05 22:22:26,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:26,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:26,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:26,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:26,445 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-05 22:22:26,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:26,709 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-05 22:22:26,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 22:22:26,710 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-05 22:22:26,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:26,711 INFO L225 Difference]: With dead ends: 88 [2020-10-05 22:22:26,711 INFO L226 Difference]: Without dead ends: 82 [2020-10-05 22:22:26,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-10-05 22:22:26,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-05 22:22:26,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-05 22:22:26,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 22:22:26,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-05 22:22:26,713 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-05 22:22:26,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:26,713 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-05 22:22:26,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:26,713 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-05 22:22:26,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:26,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:26,714 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:26,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:26,915 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:26,915 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-05 22:22:26,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:26,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655077553] [2020-10-05 22:22:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:27,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655077553] [2020-10-05 22:22:27,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342315038] [2020-10-05 22:22:27,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:27,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-05 22:22:27,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:27,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 22:22:27,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:27,104 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:27,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:27,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 22:22:27,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319454385] [2020-10-05 22:22:27,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:22:27,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:27,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:22:27,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:22:27,125 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-05 22:22:27,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:27,495 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-05 22:22:27,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 22:22:27,496 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 22:22:27,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:27,497 INFO L225 Difference]: With dead ends: 87 [2020-10-05 22:22:27,497 INFO L226 Difference]: Without dead ends: 81 [2020-10-05 22:22:27,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-10-05 22:22:27,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-05 22:22:27,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-05 22:22:27,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 22:22:27,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-05 22:22:27,499 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-05 22:22:27,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:27,500 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-05 22:22:27,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:22:27,500 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-05 22:22:27,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:27,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:27,500 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:27,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:27,707 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:27,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:27,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-05 22:22:27,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:27,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834341273] [2020-10-05 22:22:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:27,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834341273] [2020-10-05 22:22:27,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17783383] [2020-10-05 22:22:27,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:27,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 22:22:27,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:27,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:27,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-05 22:22:27,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852034567] [2020-10-05 22:22:27,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:27,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:27,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:27,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:27,881 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-05 22:22:28,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:28,196 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-05 22:22:28,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 22:22:28,197 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-05 22:22:28,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:28,198 INFO L225 Difference]: With dead ends: 84 [2020-10-05 22:22:28,198 INFO L226 Difference]: Without dead ends: 78 [2020-10-05 22:22:28,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-05 22:22:28,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-05 22:22:28,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-05 22:22:28,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 22:22:28,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-05 22:22:28,201 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-05 22:22:28,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:28,201 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-05 22:22:28,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:28,201 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-05 22:22:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:28,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:28,201 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:28,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-05 22:22:28,402 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:28,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:28,403 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-05 22:22:28,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:28,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969192340] [2020-10-05 22:22:28,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:28,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969192340] [2020-10-05 22:22:28,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794849340] [2020-10-05 22:22:28,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:28,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:28,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:28,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 22:22:28,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:28,569 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:28,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:28,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 22:22:28,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280723896] [2020-10-05 22:22:28,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:22:28,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:28,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:22:28,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:22:28,588 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-05 22:22:29,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:29,035 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-05 22:22:29,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 22:22:29,036 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 22:22:29,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:29,037 INFO L225 Difference]: With dead ends: 83 [2020-10-05 22:22:29,037 INFO L226 Difference]: Without dead ends: 77 [2020-10-05 22:22:29,038 INFO L675 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 [2020-10-05 22:22:29,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-05 22:22:29,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-05 22:22:29,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 22:22:29,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-05 22:22:29,041 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-05 22:22:29,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:29,042 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-05 22:22:29,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:22:29,042 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-05 22:22:29,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:29,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:29,042 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:29,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:29,245 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:29,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:29,245 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-05 22:22:29,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:29,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667385176] [2020-10-05 22:22:29,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:29,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667385176] [2020-10-05 22:22:29,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844443381] [2020-10-05 22:22:29,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:29,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-05 22:22:29,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:29,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 22:22:29,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:29,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:29,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-05 22:22:29,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24102078] [2020-10-05 22:22:29,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:29,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:29,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:29,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:29,410 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-05 22:22:29,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:29,802 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-05 22:22:29,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 22:22:29,803 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-05 22:22:29,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:29,804 INFO L225 Difference]: With dead ends: 80 [2020-10-05 22:22:29,804 INFO L226 Difference]: Without dead ends: 74 [2020-10-05 22:22:29,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-10-05 22:22:29,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-05 22:22:29,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-05 22:22:29,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 22:22:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-05 22:22:29,807 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-05 22:22:29,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:29,808 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-05 22:22:29,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:29,808 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-05 22:22:29,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:29,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:29,808 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:30,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-05 22:22:30,017 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:30,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:30,018 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-05 22:22:30,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:30,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840404748] [2020-10-05 22:22:30,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:30,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840404748] [2020-10-05 22:22:30,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650297595] [2020-10-05 22:22:30,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:30,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 22:22:30,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:30,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 22:22:30,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:30,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:30,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:30,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 22:22:30,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082852212] [2020-10-05 22:22:30,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:22:30,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:30,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:22:30,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:22:30,203 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-05 22:22:30,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:30,711 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-05 22:22:30,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 22:22:30,712 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 22:22:30,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:30,713 INFO L225 Difference]: With dead ends: 79 [2020-10-05 22:22:30,713 INFO L226 Difference]: Without dead ends: 73 [2020-10-05 22:22:30,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 22:22:30,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-05 22:22:30,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-05 22:22:30,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 22:22:30,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-05 22:22:30,716 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-05 22:22:30,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:30,716 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-05 22:22:30,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:22:30,716 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-05 22:22:30,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:30,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:30,717 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:30,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:30,922 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:30,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:30,923 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-05 22:22:30,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:30,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847320597] [2020-10-05 22:22:30,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:31,021 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:31,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847320597] [2020-10-05 22:22:31,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935894773] [2020-10-05 22:22:31,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:31,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-05 22:22:31,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:31,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 22:22:31,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:31,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:31,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-05 22:22:31,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508612050] [2020-10-05 22:22:31,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 22:22:31,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:31,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 22:22:31,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-05 22:22:31,082 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-05 22:22:31,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:31,484 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-05 22:22:31,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 22:22:31,485 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-05 22:22:31,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:31,486 INFO L225 Difference]: With dead ends: 95 [2020-10-05 22:22:31,486 INFO L226 Difference]: Without dead ends: 89 [2020-10-05 22:22:31,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 22:22:31,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-05 22:22:31,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-05 22:22:31,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-05 22:22:31,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-05 22:22:31,489 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-05 22:22:31,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:31,489 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-05 22:22:31,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 22:22:31,489 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-05 22:22:31,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:31,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:31,490 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:31,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-05 22:22:31,691 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:31,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:31,691 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-05 22:22:31,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:31,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497248608] [2020-10-05 22:22:31,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:31,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:31,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497248608] [2020-10-05 22:22:31,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558119433] [2020-10-05 22:22:31,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:31,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-05 22:22:31,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:31,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 22:22:31,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:31,847 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 22:22:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:31,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:31,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 22:22:31,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691918778] [2020-10-05 22:22:31,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:22:31,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:31,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:22:31,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:22:31,860 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-05 22:22:32,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:32,416 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-10-05 22:22:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 22:22:32,416 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 22:22:32,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:32,417 INFO L225 Difference]: With dead ends: 76 [2020-10-05 22:22:32,417 INFO L226 Difference]: Without dead ends: 68 [2020-10-05 22:22:32,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 22:22:32,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-05 22:22:32,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-10-05 22:22:32,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-05 22:22:32,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-05 22:22:32,419 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-05 22:22:32,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:32,420 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-05 22:22:32,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:22:32,420 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-05 22:22:32,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 22:22:32,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:32,420 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:32,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:32,621 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:32,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:32,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-05 22:22:32,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:32,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061860579] [2020-10-05 22:22:32,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:32,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061860579] [2020-10-05 22:22:32,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500251223] [2020-10-05 22:22:32,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:32,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 22:22:32,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:32,778 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 22:22:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:32,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 22:22:32,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 22:22:32,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734821414] [2020-10-05 22:22:32,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 22:22:32,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:32,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 22:22:32,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-05 22:22:32,791 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-05 22:22:33,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:33,300 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-05 22:22:33,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 22:22:33,301 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 22:22:33,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:33,302 INFO L225 Difference]: With dead ends: 84 [2020-10-05 22:22:33,302 INFO L226 Difference]: Without dead ends: 79 [2020-10-05 22:22:33,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 22:22:33,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-05 22:22:33,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-05 22:22:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-05 22:22:33,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-05 22:22:33,305 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-05 22:22:33,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:33,305 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-05 22:22:33,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 22:22:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-05 22:22:33,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 22:22:33,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:33,306 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:33,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-05 22:22:33,508 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:33,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:33,508 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-05 22:22:33,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:33,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323180825] [2020-10-05 22:22:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:33,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:33,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323180825] [2020-10-05 22:22:33,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692717418] [2020-10-05 22:22:33,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:33,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 22:22:33,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:33,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:22:33,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:33,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-05 22:22:33,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2020-10-05 22:22:33,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629298225] [2020-10-05 22:22:33,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 22:22:33,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:33,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 22:22:33,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:22:33,644 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 8 states. [2020-10-05 22:22:33,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:33,659 INFO L93 Difference]: Finished difference Result 151 states and 338 transitions. [2020-10-05 22:22:33,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:22:33,660 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-05 22:22:33,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:33,660 INFO L225 Difference]: With dead ends: 151 [2020-10-05 22:22:33,661 INFO L226 Difference]: Without dead ends: 50 [2020-10-05 22:22:33,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-10-05 22:22:33,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-05 22:22:33,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-05 22:22:33,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 22:22:33,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 100 transitions. [2020-10-05 22:22:33,663 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 100 transitions. Word has length 19 [2020-10-05 22:22:33,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:33,663 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 100 transitions. [2020-10-05 22:22:33,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 22:22:33,664 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 100 transitions. [2020-10-05 22:22:33,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 22:22:33,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 22:22:33,664 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 22:22:33,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-05 22:22:33,865 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 22:22:33,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 22:22:33,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-05 22:22:33,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 22:22:33,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203023185] [2020-10-05 22:22:33,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 22:22:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 22:22:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:34,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203023185] [2020-10-05 22:22:34,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679428795] [2020-10-05 22:22:34,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:34,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-05 22:22:34,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 22:22:34,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 22:22:34,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 22:22:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 22:22:34,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-05 22:22:34,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 21 [2020-10-05 22:22:34,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148005506] [2020-10-05 22:22:34,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 22:22:34,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 22:22:34,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 22:22:34,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:22:34,213 INFO L87 Difference]: Start difference. First operand 50 states and 100 transitions. Second operand 8 states. [2020-10-05 22:22:34,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 22:22:34,229 INFO L93 Difference]: Finished difference Result 86 states and 150 transitions. [2020-10-05 22:22:34,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 22:22:34,230 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-05 22:22:34,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 22:22:34,231 INFO L225 Difference]: With dead ends: 86 [2020-10-05 22:22:34,231 INFO L226 Difference]: Without dead ends: 0 [2020-10-05 22:22:34,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-05 22:22:34,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-05 22:22:34,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-05 22:22:34,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-05 22:22:34,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-05 22:22:34,232 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-10-05 22:22:34,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 22:22:34,232 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-05 22:22:34,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 22:22:34,232 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-05 22:22:34,232 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-05 22:22:34,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 22:22:34,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 10:22:34 BasicIcfg [2020-10-05 22:22:34,438 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-05 22:22:34,441 INFO L168 Benchmark]: Toolchain (without parser) took 46825.58 ms. Allocated memory was 138.9 MB in the beginning and 455.1 MB in the end (delta: 316.1 MB). Free memory was 99.5 MB in the beginning and 165.3 MB in the end (delta: -65.8 MB). Peak memory consumption was 250.4 MB. Max. memory is 7.1 GB. [2020-10-05 22:22:34,442 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 138.9 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-10-05 22:22:34,442 INFO L168 Benchmark]: CACSL2BoogieTranslator took 696.02 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 99.3 MB in the beginning and 161.0 MB in the end (delta: -61.7 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2020-10-05 22:22:34,443 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.65 ms. Allocated memory is still 201.9 MB. Free memory was 161.0 MB in the beginning and 159.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-05 22:22:34,443 INFO L168 Benchmark]: Boogie Preprocessor took 29.39 ms. Allocated memory is still 201.9 MB. Free memory was 159.0 MB in the beginning and 157.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-05 22:22:34,444 INFO L168 Benchmark]: RCFGBuilder took 407.87 ms. Allocated memory is still 201.9 MB. Free memory was 157.7 MB in the beginning and 137.3 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2020-10-05 22:22:34,444 INFO L168 Benchmark]: TraceAbstraction took 45631.51 ms. Allocated memory was 201.9 MB in the beginning and 455.1 MB in the end (delta: 253.2 MB). Free memory was 136.6 MB in the beginning and 165.3 MB in the end (delta: -28.7 MB). Peak memory consumption was 224.6 MB. Max. memory is 7.1 GB. [2020-10-05 22:22:34,446 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 138.9 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 696.02 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 99.3 MB in the beginning and 161.0 MB in the end (delta: -61.7 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 51.65 ms. Allocated memory is still 201.9 MB. Free memory was 161.0 MB in the beginning and 159.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.39 ms. Allocated memory is still 201.9 MB. Free memory was 159.0 MB in the beginning and 157.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 407.87 ms. Allocated memory is still 201.9 MB. Free memory was 157.7 MB in the beginning and 137.3 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 45631.51 ms. Allocated memory was 201.9 MB in the beginning and 455.1 MB in the end (delta: 253.2 MB). Free memory was 136.6 MB in the beginning and 165.3 MB in the end (delta: -28.7 MB). Peak memory consumption was 224.6 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: 45.4s, OverallIterations: 71, TraceHistogramMax: 6, AutomataDifference: 17.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 1144 SDtfs, 3049 SDslu, 4501 SDs, 0 SdLazy, 4778 SolverSat, 2192 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2335 GetRequests, 834 SyntacticMatches, 64 SemanticMatches, 1437 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6964 ImplicationChecksByTransitivity, 16.8s 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, 1147 StatesRemovedByMinimization, 68 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 2056 NumberOfCodeBlocks, 2056 NumberOfCodeBlocksAsserted, 254 NumberOfCheckSat, 1919 ConstructedInterpolants, 0 QuantifiedInterpolants, 118755 SizeOfPredicates, 456 NumberOfNonLiveVariables, 6614 ConjunctsInSsa, 728 ConjunctsInUnsatCore, 137 InterpolantComputations, 7 PerfectInterpolantSequences, 62/1440 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...