/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 04:38:21,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 04:38:21,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 04:38:21,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 04:38:21,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 04:38:21,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 04:38:21,172 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 04:38:21,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 04:38:21,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 04:38:21,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 04:38:21,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 04:38:21,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 04:38:21,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 04:38:21,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 04:38:21,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 04:38:21,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 04:38:21,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 04:38:21,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 04:38:21,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 04:38:21,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 04:38:21,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 04:38:21,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 04:38:21,199 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 04:38:21,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 04:38:21,202 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-12-27 04:38:21,205 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 04:38:21,206 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 04:38:21,208 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 04:38:21,208 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 04:38:21,209 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 04:38:21,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 04:38:21,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 04:38:21,212 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 04:38:21,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 04:38:21,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 04:38:21,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 04:38:21,217 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe.epf [2019-12-27 04:38:21,231 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 04:38:21,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 04:38:21,235 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 04:38:21,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 04:38:21,235 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 04:38:21,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 04:38:21,236 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 04:38:21,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 04:38:21,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 04:38:21,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 04:38:21,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 04:38:21,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 04:38:21,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 04:38:21,238 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 04:38:21,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 04:38:21,238 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 04:38:21,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 04:38:21,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 04:38:21,240 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 04:38:21,240 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 04:38:21,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 04:38:21,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 04:38:21,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 04:38:21,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 04:38:21,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 04:38:21,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 04:38:21,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 04:38:21,242 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2019-12-27 04:38:21,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 04:38:21,242 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 04:38:21,529 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 04:38:21,542 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 04:38:21,546 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 04:38:21,547 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 04:38:21,548 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 04:38:21,548 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2019-12-27 04:38:21,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dc50e552/1d8320eb1a0f42dd8d19dbc8507d6283/FLAGbbb9e0f93 [2019-12-27 04:38:22,159 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 04:38:22,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i [2019-12-27 04:38:22,182 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dc50e552/1d8320eb1a0f42dd8d19dbc8507d6283/FLAGbbb9e0f93 [2019-12-27 04:38:22,467 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dc50e552/1d8320eb1a0f42dd8d19dbc8507d6283 [2019-12-27 04:38:22,477 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 04:38:22,479 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 04:38:22,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 04:38:22,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 04:38:22,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 04:38:22,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 04:38:22" (1/1) ... [2019-12-27 04:38:22,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@145bce7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:22, skipping insertion in model container [2019-12-27 04:38:22,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 04:38:22" (1/1) ... [2019-12-27 04:38:22,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 04:38:22,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 04:38:23,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 04:38:23,087 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 04:38:23,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 04:38:23,208 INFO L208 MainTranslator]: Completed translation [2019-12-27 04:38:23,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23 WrapperNode [2019-12-27 04:38:23,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 04:38:23,209 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 04:38:23,209 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 04:38:23,210 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 04:38:23,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,234 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 04:38:23,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 04:38:23,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 04:38:23,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 04:38:23,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (1/1) ... [2019-12-27 04:38:23,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 04:38:23,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 04:38:23,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 04:38:23,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 04:38:23,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (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 [2019-12-27 04:38:23,356 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-27 04:38:23,356 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-27 04:38:23,357 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-27 04:38:23,357 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-27 04:38:23,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 04:38:23,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-27 04:38:23,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 04:38:23,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 04:38:23,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-27 04:38:23,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 04:38:23,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 04:38:23,363 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-27 04:38:23,750 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 04:38:23,750 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-27 04:38:23,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 04:38:23 BoogieIcfgContainer [2019-12-27 04:38:23,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 04:38:23,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 04:38:23,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 04:38:23,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 04:38:23,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 04:38:22" (1/3) ... [2019-12-27 04:38:23,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a377dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 04:38:23, skipping insertion in model container [2019-12-27 04:38:23,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23" (2/3) ... [2019-12-27 04:38:23,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a377dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 04:38:23, skipping insertion in model container [2019-12-27 04:38:23,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 04:38:23" (3/3) ... [2019-12-27 04:38:23,761 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2019-12-27 04:38:23,770 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 04:38:23,770 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 04:38:23,775 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 04:38:23,776 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 04:38:23,802 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,802 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,803 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,803 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,804 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,804 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,804 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,804 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,805 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,805 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,805 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,805 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,806 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,806 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,806 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,807 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,807 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,807 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,807 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,808 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,808 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,808 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,809 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,809 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,809 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,810 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,811 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,811 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,811 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,812 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,816 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,816 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,816 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,817 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,817 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,817 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,830 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,832 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,832 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,833 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,833 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,833 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,856 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 04:38:23,879 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 04:38:23,879 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 04:38:23,879 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 04:38:23,879 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-27 04:38:23,880 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 04:38:23,880 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 04:38:23,880 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 04:38:23,880 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 04:38:23,897 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-27 04:38:23,899 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 04:38:23,949 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 04:38:23,950 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 04:38:23,956 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-27 04:38:23,960 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 04:38:23,981 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 04:38:23,981 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 04:38:23,983 INFO L76 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 51 events. 5/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs. 0/45 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2019-12-27 04:38:23,986 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-27 04:38:23,988 INFO L182 etLargeBlockEncoding]: Variable Check. [2019-12-27 04:38:25,170 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-27 04:38:25,278 INFO L206 etLargeBlockEncoding]: Checked pairs total: 686 [2019-12-27 04:38:25,278 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-27 04:38:25,282 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-27 04:38:25,293 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-27 04:38:25,295 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-27 04:38:25,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-27 04:38:25,302 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:25,303 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-27 04:38:25,304 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:25,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:25,311 INFO L82 PathProgramCache]: Analyzing trace with hash 214338580, now seen corresponding path program 1 times [2019-12-27 04:38:25,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:25,323 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305306117] [2019-12-27 04:38:25,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:25,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305306117] [2019-12-27 04:38:25,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:25,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-27 04:38:25,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587848413] [2019-12-27 04:38:25,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 04:38:25,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:25,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 04:38:25,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 04:38:25,586 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-27 04:38:25,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:25,621 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-27 04:38:25,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 04:38:25,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-27 04:38:25,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:25,636 INFO L225 Difference]: With dead ends: 54 [2019-12-27 04:38:25,636 INFO L226 Difference]: Without dead ends: 36 [2019-12-27 04:38:25,637 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 04:38:25,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-27 04:38:25,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-27 04:38:25,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-27 04:38:25,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-27 04:38:25,679 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-27 04:38:25,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:25,679 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-27 04:38:25,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 04:38:25,679 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-27 04:38:25,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 04:38:25,680 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:25,680 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:25,681 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:25,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:25,681 INFO L82 PathProgramCache]: Analyzing trace with hash -179042095, now seen corresponding path program 1 times [2019-12-27 04:38:25,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:25,682 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332722224] [2019-12-27 04:38:25,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:25,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332722224] [2019-12-27 04:38:25,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:25,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 04:38:25,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582962106] [2019-12-27 04:38:25,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 04:38:25,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:25,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 04:38:25,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-27 04:38:25,769 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-27 04:38:25,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:25,800 INFO L93 Difference]: Finished difference Result 42 states and 90 transitions. [2019-12-27 04:38:25,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 04:38:25,801 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 04:38:25,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:25,802 INFO L225 Difference]: With dead ends: 42 [2019-12-27 04:38:25,802 INFO L226 Difference]: Without dead ends: 41 [2019-12-27 04:38:25,803 INFO L631 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 [2019-12-27 04:38:25,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-27 04:38:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-12-27 04:38:25,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-27 04:38:25,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 86 transitions. [2019-12-27 04:38:25,811 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 86 transitions. Word has length 7 [2019-12-27 04:38:25,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:25,812 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 86 transitions. [2019-12-27 04:38:25,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 04:38:25,812 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 86 transitions. [2019-12-27 04:38:25,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 04:38:25,813 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:25,813 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:25,813 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:25,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:25,814 INFO L82 PathProgramCache]: Analyzing trace with hash -179038096, now seen corresponding path program 1 times [2019-12-27 04:38:25,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:25,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158857090] [2019-12-27 04:38:25,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:25,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:25,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158857090] [2019-12-27 04:38:25,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:25,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 04:38:25,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383010412] [2019-12-27 04:38:25,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 04:38:25,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:25,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 04:38:25,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-27 04:38:25,899 INFO L87 Difference]: Start difference. First operand 39 states and 86 transitions. Second operand 4 states. [2019-12-27 04:38:25,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:25,923 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-27 04:38:25,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 04:38:25,924 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 04:38:25,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:25,925 INFO L225 Difference]: With dead ends: 51 [2019-12-27 04:38:25,925 INFO L226 Difference]: Without dead ends: 50 [2019-12-27 04:38:25,926 INFO L631 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 [2019-12-27 04:38:25,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-27 04:38:25,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-27 04:38:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-27 04:38:25,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-27 04:38:25,934 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-27 04:38:25,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:25,934 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-27 04:38:25,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 04:38:25,935 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-27 04:38:25,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 04:38:25,935 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:25,936 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:25,936 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:25,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:25,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1255337161, now seen corresponding path program 2 times [2019-12-27 04:38:25,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:25,937 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190531827] [2019-12-27 04:38:25,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:26,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190531827] [2019-12-27 04:38:26,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735687813] [2019-12-27 04:38:26,024 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:26,100 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:26,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:26,103 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 04:38:26,107 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:26,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:26,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 04:38:26,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425634024] [2019-12-27 04:38:26,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 04:38:26,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:26,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 04:38:26,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-27 04:38:26,158 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 8 states. [2019-12-27 04:38:26,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:26,217 INFO L93 Difference]: Finished difference Result 56 states and 118 transitions. [2019-12-27 04:38:26,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 04:38:26,218 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-27 04:38:26,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:26,219 INFO L225 Difference]: With dead ends: 56 [2019-12-27 04:38:26,219 INFO L226 Difference]: Without dead ends: 55 [2019-12-27 04:38:26,220 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:26,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-27 04:38:26,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-12-27 04:38:26,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-27 04:38:26,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 108 transitions. [2019-12-27 04:38:26,229 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 108 transitions. Word has length 8 [2019-12-27 04:38:26,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:26,230 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 108 transitions. [2019-12-27 04:38:26,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 04:38:26,230 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 108 transitions. [2019-12-27 04:38:26,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 04:38:26,231 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:26,231 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:26,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:26,432 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:26,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1255213037, now seen corresponding path program 2 times [2019-12-27 04:38:26,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:26,434 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374207682] [2019-12-27 04:38:26,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:26,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:26,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374207682] [2019-12-27 04:38:26,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830807952] [2019-12-27 04:38:26,527 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:26,598 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:26,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:26,600 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 04:38:26,602 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:26,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:26,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 04:38:26,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879540954] [2019-12-27 04:38:26,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 04:38:26,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:26,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 04:38:26,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-27 04:38:26,658 INFO L87 Difference]: Start difference. First operand 50 states and 108 transitions. Second operand 8 states. [2019-12-27 04:38:26,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:26,708 INFO L93 Difference]: Finished difference Result 63 states and 134 transitions. [2019-12-27 04:38:26,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 04:38:26,708 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-27 04:38:26,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:26,709 INFO L225 Difference]: With dead ends: 63 [2019-12-27 04:38:26,709 INFO L226 Difference]: Without dead ends: 62 [2019-12-27 04:38:26,710 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:26,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-27 04:38:26,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-12-27 04:38:26,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 04:38:26,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-27 04:38:26,718 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-27 04:38:26,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:26,719 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-27 04:38:26,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 04:38:26,719 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-27 04:38:26,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 04:38:26,719 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:26,720 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:26,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:26,921 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:26,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:26,921 INFO L82 PathProgramCache]: Analyzing trace with hash -260745839, now seen corresponding path program 3 times [2019-12-27 04:38:26,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:26,922 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730274263] [2019-12-27 04:38:26,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:27,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730274263] [2019-12-27 04:38:27,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488049758] [2019-12-27 04:38:27,000 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:27,063 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:27,064 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:27,065 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:27,067 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:27,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:27,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:27,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775910235] [2019-12-27 04:38:27,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:27,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:27,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:27,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:27,148 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 10 states. [2019-12-27 04:38:27,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:27,238 INFO L93 Difference]: Finished difference Result 66 states and 142 transitions. [2019-12-27 04:38:27,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 04:38:27,238 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-27 04:38:27,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:27,240 INFO L225 Difference]: With dead ends: 66 [2019-12-27 04:38:27,240 INFO L226 Difference]: Without dead ends: 65 [2019-12-27 04:38:27,240 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-27 04:38:27,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-27 04:38:27,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2019-12-27 04:38:27,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-27 04:38:27,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2019-12-27 04:38:27,248 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 9 [2019-12-27 04:38:27,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:27,248 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2019-12-27 04:38:27,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:27,248 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2019-12-27 04:38:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 04:38:27,249 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:27,249 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:27,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:27,454 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:27,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:27,455 INFO L82 PathProgramCache]: Analyzing trace with hash -260744723, now seen corresponding path program 1 times [2019-12-27 04:38:27,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:27,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767615777] [2019-12-27 04:38:27,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:27,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767615777] [2019-12-27 04:38:27,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:27,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 04:38:27,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702286929] [2019-12-27 04:38:27,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 04:38:27,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:27,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 04:38:27,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-27 04:38:27,507 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand 5 states. [2019-12-27 04:38:27,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:27,559 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-27 04:38:27,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 04:38:27,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 04:38:27,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:27,562 INFO L225 Difference]: With dead ends: 68 [2019-12-27 04:38:27,562 INFO L226 Difference]: Without dead ends: 67 [2019-12-27 04:38:27,563 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-27 04:38:27,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-27 04:38:27,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-12-27 04:38:27,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-27 04:38:27,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 131 transitions. [2019-12-27 04:38:27,569 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 131 transitions. Word has length 9 [2019-12-27 04:38:27,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:27,570 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 131 transitions. [2019-12-27 04:38:27,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 04:38:27,570 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 131 transitions. [2019-12-27 04:38:27,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 04:38:27,571 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:27,571 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:27,571 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:27,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:27,572 INFO L82 PathProgramCache]: Analyzing trace with hash -260711243, now seen corresponding path program 2 times [2019-12-27 04:38:27,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:27,572 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473791829] [2019-12-27 04:38:27,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:27,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:27,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473791829] [2019-12-27 04:38:27,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:27,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 04:38:27,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447841519] [2019-12-27 04:38:27,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 04:38:27,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:27,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 04:38:27,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-27 04:38:27,622 INFO L87 Difference]: Start difference. First operand 59 states and 131 transitions. Second operand 5 states. [2019-12-27 04:38:27,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:27,660 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-27 04:38:27,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 04:38:27,661 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 04:38:27,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:27,661 INFO L225 Difference]: With dead ends: 68 [2019-12-27 04:38:27,661 INFO L226 Difference]: Without dead ends: 67 [2019-12-27 04:38:27,662 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-12-27 04:38:27,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-27 04:38:27,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2019-12-27 04:38:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-27 04:38:27,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 134 transitions. [2019-12-27 04:38:27,668 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 134 transitions. Word has length 9 [2019-12-27 04:38:27,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:27,668 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 134 transitions. [2019-12-27 04:38:27,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 04:38:27,668 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 134 transitions. [2019-12-27 04:38:27,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 04:38:27,669 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:27,669 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:27,670 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:27,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:27,670 INFO L82 PathProgramCache]: Analyzing trace with hash -256897840, now seen corresponding path program 3 times [2019-12-27 04:38:27,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:27,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824643909] [2019-12-27 04:38:27,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:27,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:27,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824643909] [2019-12-27 04:38:27,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33875464] [2019-12-27 04:38:27,742 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:27,804 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:27,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:27,805 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:27,812 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:27,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:27,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:27,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541397873] [2019-12-27 04:38:27,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:27,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:27,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:27,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:27,897 INFO L87 Difference]: Start difference. First operand 62 states and 134 transitions. Second operand 10 states. [2019-12-27 04:38:27,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:27,984 INFO L93 Difference]: Finished difference Result 77 states and 162 transitions. [2019-12-27 04:38:27,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 04:38:27,984 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-27 04:38:27,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:27,985 INFO L225 Difference]: With dead ends: 77 [2019-12-27 04:38:27,985 INFO L226 Difference]: Without dead ends: 76 [2019-12-27 04:38:27,985 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-27 04:38:27,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-27 04:38:27,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2019-12-27 04:38:27,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-27 04:38:27,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-27 04:38:27,992 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-27 04:38:27,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:27,992 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-27 04:38:27,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:27,992 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-27 04:38:27,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:27,993 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:27,993 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:28,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:28,197 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:28,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:28,198 INFO L82 PathProgramCache]: Analyzing trace with hash 506814071, now seen corresponding path program 4 times [2019-12-27 04:38:28,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:28,198 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756564896] [2019-12-27 04:38:28,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:28,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756564896] [2019-12-27 04:38:28,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020168390] [2019-12-27 04:38:28,290 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:28,336 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:28,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:28,337 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:28,338 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:28,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:28,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:28,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401862955] [2019-12-27 04:38:28,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:28,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:28,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:28,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:28,424 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 12 states. [2019-12-27 04:38:28,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:28,523 INFO L93 Difference]: Finished difference Result 80 states and 170 transitions. [2019-12-27 04:38:28,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 04:38:28,524 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-27 04:38:28,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:28,525 INFO L225 Difference]: With dead ends: 80 [2019-12-27 04:38:28,525 INFO L226 Difference]: Without dead ends: 79 [2019-12-27 04:38:28,525 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:28,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-27 04:38:28,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2019-12-27 04:38:28,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 04:38:28,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-27 04:38:28,531 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-27 04:38:28,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:28,531 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-27 04:38:28,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:28,532 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-27 04:38:28,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:28,532 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:28,533 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:28,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:28,748 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:28,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:28,748 INFO L82 PathProgramCache]: Analyzing trace with hash 506815187, now seen corresponding path program 3 times [2019-12-27 04:38:28,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:28,749 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260750093] [2019-12-27 04:38:28,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:28,816 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260750093] [2019-12-27 04:38:28,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819898903] [2019-12-27 04:38:28,817 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:28,861 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:28,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:28,863 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:28,863 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:28,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:28,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:28,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50305725] [2019-12-27 04:38:28,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:28,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:28,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:28,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:28,926 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-27 04:38:29,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:29,002 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-27 04:38:29,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 04:38:29,003 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 04:38:29,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:29,004 INFO L225 Difference]: With dead ends: 88 [2019-12-27 04:38:29,004 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 04:38:29,004 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:29,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 04:38:29,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2019-12-27 04:38:29,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 04:38:29,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-27 04:38:29,009 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-27 04:38:29,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:29,010 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-27 04:38:29,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:29,010 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-27 04:38:29,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:29,011 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:29,011 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:29,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:29,215 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:29,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:29,216 INFO L82 PathProgramCache]: Analyzing trace with hash 506848822, now seen corresponding path program 4 times [2019-12-27 04:38:29,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:29,217 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354462265] [2019-12-27 04:38:29,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:29,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354462265] [2019-12-27 04:38:29,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447972408] [2019-12-27 04:38:29,267 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:29,313 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:29,313 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:29,314 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:29,316 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:29,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:29,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:29,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:29,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6556108] [2019-12-27 04:38:29,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:29,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:29,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:29,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:29,369 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-27 04:38:29,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:29,463 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-27 04:38:29,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 04:38:29,463 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 04:38:29,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:29,465 INFO L225 Difference]: With dead ends: 88 [2019-12-27 04:38:29,465 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 04:38:29,466 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-12-27 04:38:29,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 04:38:29,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2019-12-27 04:38:29,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-27 04:38:29,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-27 04:38:29,471 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-27 04:38:29,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:29,471 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-27 04:38:29,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:29,471 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-27 04:38:29,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:29,472 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:29,472 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:29,682 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:29,683 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:29,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:29,683 INFO L82 PathProgramCache]: Analyzing trace with hash 506848667, now seen corresponding path program 5 times [2019-12-27 04:38:29,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:29,684 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169439941] [2019-12-27 04:38:29,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:29,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169439941] [2019-12-27 04:38:29,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396656611] [2019-12-27 04:38:29,751 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:29,799 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:29,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:29,800 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:29,803 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:29,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:29,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:29,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350127051] [2019-12-27 04:38:29,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:29,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:29,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:29,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:29,862 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-27 04:38:29,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:29,968 INFO L93 Difference]: Finished difference Result 94 states and 194 transitions. [2019-12-27 04:38:29,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 04:38:29,969 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 04:38:29,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:29,970 INFO L225 Difference]: With dead ends: 94 [2019-12-27 04:38:29,971 INFO L226 Difference]: Without dead ends: 92 [2019-12-27 04:38:29,971 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:29,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-12-27 04:38:29,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2019-12-27 04:38:29,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-27 04:38:29,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-27 04:38:29,977 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-27 04:38:29,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:29,977 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-27 04:38:29,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-27 04:38:29,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:29,978 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:29,979 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:30,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:30,190 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:30,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:30,190 INFO L82 PathProgramCache]: Analyzing trace with hash 507886702, now seen corresponding path program 6 times [2019-12-27 04:38:30,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:30,191 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654452854] [2019-12-27 04:38:30,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:30,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654452854] [2019-12-27 04:38:30,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304782608] [2019-12-27 04:38:30,272 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:30,313 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 04:38:30,313 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:30,313 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:30,314 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:30,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:30,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:30,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734786615] [2019-12-27 04:38:30,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:30,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:30,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:30,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:30,366 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 10 states. [2019-12-27 04:38:30,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:30,478 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-27 04:38:30,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 04:38:30,479 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 04:38:30,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:30,480 INFO L225 Difference]: With dead ends: 88 [2019-12-27 04:38:30,480 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 04:38:30,481 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:30,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 04:38:30,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2019-12-27 04:38:30,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-27 04:38:30,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-27 04:38:30,486 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-27 04:38:30,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:30,486 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-27 04:38:30,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:30,486 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-27 04:38:30,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:30,487 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:30,487 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:30,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:30,698 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:30,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:30,699 INFO L82 PathProgramCache]: Analyzing trace with hash 626102195, now seen corresponding path program 4 times [2019-12-27 04:38:30,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:30,700 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627456388] [2019-12-27 04:38:30,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:30,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:30,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627456388] [2019-12-27 04:38:30,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443401996] [2019-12-27 04:38:30,778 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:30,838 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:30,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:30,839 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:30,839 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:30,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:30,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:30,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998133896] [2019-12-27 04:38:30,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:30,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:30,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:30,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:30,901 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 12 states. [2019-12-27 04:38:31,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:31,007 INFO L93 Difference]: Finished difference Result 92 states and 194 transitions. [2019-12-27 04:38:31,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 04:38:31,014 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-27 04:38:31,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:31,014 INFO L225 Difference]: With dead ends: 92 [2019-12-27 04:38:31,015 INFO L226 Difference]: Without dead ends: 91 [2019-12-27 04:38:31,015 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:31,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-27 04:38:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2019-12-27 04:38:31,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 04:38:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-27 04:38:31,019 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-27 04:38:31,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:31,020 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-27 04:38:31,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:31,020 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-27 04:38:31,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:31,021 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:31,021 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:31,224 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:31,225 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:31,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:31,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1468632495, now seen corresponding path program 5 times [2019-12-27 04:38:31,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:31,226 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759138339] [2019-12-27 04:38:31,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:31,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:31,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759138339] [2019-12-27 04:38:31,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215523379] [2019-12-27 04:38:31,305 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:31,371 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:38:31,371 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:31,373 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:31,375 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:31,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:31,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:31,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025481420] [2019-12-27 04:38:31,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:31,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:31,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:31,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:31,517 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 14 states. [2019-12-27 04:38:31,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:31,698 INFO L93 Difference]: Finished difference Result 95 states and 202 transitions. [2019-12-27 04:38:31,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 04:38:31,699 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-27 04:38:31,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:31,700 INFO L225 Difference]: With dead ends: 95 [2019-12-27 04:38:31,701 INFO L226 Difference]: Without dead ends: 94 [2019-12-27 04:38:31,701 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2019-12-27 04:38:31,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-27 04:38:31,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2019-12-27 04:38:31,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 04:38:31,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 04:38:31,707 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 04:38:31,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:31,708 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 04:38:31,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:31,708 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 04:38:31,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:31,709 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:31,709 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:31,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:31,915 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:31,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:31,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1468631379, now seen corresponding path program 7 times [2019-12-27 04:38:31,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:31,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138439997] [2019-12-27 04:38:31,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:31,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138439997] [2019-12-27 04:38:31,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140501486] [2019-12-27 04:38:31,999 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:32,072 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:32,073 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:32,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:32,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:32,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177161363] [2019-12-27 04:38:32,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:32,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:32,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:32,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:32,180 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-27 04:38:32,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:32,391 INFO L93 Difference]: Finished difference Result 104 states and 220 transitions. [2019-12-27 04:38:32,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 04:38:32,392 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:32,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:32,393 INFO L225 Difference]: With dead ends: 104 [2019-12-27 04:38:32,394 INFO L226 Difference]: Without dead ends: 103 [2019-12-27 04:38:32,394 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:38:32,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-27 04:38:32,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2019-12-27 04:38:32,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 04:38:32,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 04:38:32,400 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 04:38:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:32,400 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 04:38:32,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:32,401 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 04:38:32,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:32,402 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:32,402 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:32,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:32,615 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:32,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:32,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597744, now seen corresponding path program 8 times [2019-12-27 04:38:32,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:32,616 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019073665] [2019-12-27 04:38:32,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:32,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019073665] [2019-12-27 04:38:32,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427317658] [2019-12-27 04:38:32,690 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:32,739 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:32,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:32,740 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:32,740 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:32,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:32,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:32,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:32,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724899852] [2019-12-27 04:38:32,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:32,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:32,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:32,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:32,817 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-27 04:38:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:32,945 INFO L93 Difference]: Finished difference Result 110 states and 230 transitions. [2019-12-27 04:38:32,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 04:38:32,946 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:32,947 INFO L225 Difference]: With dead ends: 110 [2019-12-27 04:38:32,947 INFO L226 Difference]: Without dead ends: 108 [2019-12-27 04:38:32,947 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:32,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-27 04:38:32,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 84. [2019-12-27 04:38:32,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 04:38:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-27 04:38:32,951 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-27 04:38:32,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:32,952 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-27 04:38:32,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:32,952 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-27 04:38:32,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:32,952 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:32,953 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:33,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:33,153 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:33,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:33,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597899, now seen corresponding path program 9 times [2019-12-27 04:38:33,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:33,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640631013] [2019-12-27 04:38:33,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:33,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640631013] [2019-12-27 04:38:33,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342743143] [2019-12-27 04:38:33,217 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:33,266 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:33,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:33,267 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:33,268 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:33,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:33,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:33,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:33,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403543960] [2019-12-27 04:38:33,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:33,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:33,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:33,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:33,458 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-27 04:38:33,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:33,643 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-27 04:38:33,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 04:38:33,644 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:33,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:33,645 INFO L225 Difference]: With dead ends: 107 [2019-12-27 04:38:33,645 INFO L226 Difference]: Without dead ends: 106 [2019-12-27 04:38:33,646 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2019-12-27 04:38:33,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-27 04:38:33,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2019-12-27 04:38:33,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 04:38:33,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-27 04:38:33,650 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-27 04:38:33,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:33,650 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-27 04:38:33,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:33,651 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-27 04:38:33,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:33,651 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:33,651 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:33,854 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:33,855 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:33,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:33,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555214, now seen corresponding path program 10 times [2019-12-27 04:38:33,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:33,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938224749] [2019-12-27 04:38:33,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:33,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938224749] [2019-12-27 04:38:33,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020479608] [2019-12-27 04:38:33,942 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:33,991 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:33,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:33,992 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:33,992 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:34,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:34,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:34,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851047090] [2019-12-27 04:38:34,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:34,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:34,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:34,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:34,078 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-27 04:38:34,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:34,256 INFO L93 Difference]: Finished difference Result 117 states and 243 transitions. [2019-12-27 04:38:34,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:38:34,257 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:34,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:34,258 INFO L225 Difference]: With dead ends: 117 [2019-12-27 04:38:34,258 INFO L226 Difference]: Without dead ends: 115 [2019-12-27 04:38:34,258 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:38:34,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-27 04:38:34,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 83. [2019-12-27 04:38:34,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 04:38:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 183 transitions. [2019-12-27 04:38:34,262 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 183 transitions. Word has length 11 [2019-12-27 04:38:34,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:34,262 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 183 transitions. [2019-12-27 04:38:34,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:34,263 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 183 transitions. [2019-12-27 04:38:34,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:34,263 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:34,263 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:34,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:34,464 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:34,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:34,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1467559864, now seen corresponding path program 11 times [2019-12-27 04:38:34,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:34,466 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124168770] [2019-12-27 04:38:34,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:34,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:34,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124168770] [2019-12-27 04:38:34,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442010173] [2019-12-27 04:38:34,537 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:34,583 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:34,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:34,584 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:34,586 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:34,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:34,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:34,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674720524] [2019-12-27 04:38:34,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:34,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:34,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:34,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:34,662 INFO L87 Difference]: Start difference. First operand 83 states and 183 transitions. Second operand 12 states. [2019-12-27 04:38:34,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:34,818 INFO L93 Difference]: Finished difference Result 121 states and 250 transitions. [2019-12-27 04:38:34,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:38:34,818 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:34,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:34,819 INFO L225 Difference]: With dead ends: 121 [2019-12-27 04:38:34,820 INFO L226 Difference]: Without dead ends: 119 [2019-12-27 04:38:34,820 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:38:34,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-27 04:38:34,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2019-12-27 04:38:34,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 04:38:34,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 04:38:34,825 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 04:38:34,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:34,825 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 04:38:34,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:34,825 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 04:38:34,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:34,826 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:34,826 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:35,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:35,030 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:35,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:35,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1467560019, now seen corresponding path program 12 times [2019-12-27 04:38:35,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:35,031 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022283986] [2019-12-27 04:38:35,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:35,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022283986] [2019-12-27 04:38:35,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169166917] [2019-12-27 04:38:35,092 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:35,138 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 04:38:35,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:35,140 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:35,141 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:35,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:35,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:35,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:35,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119730844] [2019-12-27 04:38:35,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:35,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:35,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:35,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:35,235 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-27 04:38:35,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:35,451 INFO L93 Difference]: Finished difference Result 117 states and 243 transitions. [2019-12-27 04:38:35,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:35,452 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:35,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:35,453 INFO L225 Difference]: With dead ends: 117 [2019-12-27 04:38:35,453 INFO L226 Difference]: Without dead ends: 115 [2019-12-27 04:38:35,453 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2019-12-27 04:38:35,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-27 04:38:35,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 88. [2019-12-27 04:38:35,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 04:38:35,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 194 transitions. [2019-12-27 04:38:35,458 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 194 transitions. Word has length 11 [2019-12-27 04:38:35,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:35,459 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 194 transitions. [2019-12-27 04:38:35,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:35,459 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 194 transitions. [2019-12-27 04:38:35,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:35,459 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:35,459 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:35,660 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:35,660 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:35,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:35,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380934, now seen corresponding path program 13 times [2019-12-27 04:38:35,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:35,662 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688666368] [2019-12-27 04:38:35,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:35,720 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688666368] [2019-12-27 04:38:35,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170551938] [2019-12-27 04:38:35,721 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:35,764 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:35,765 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:35,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:35,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:35,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327000913] [2019-12-27 04:38:35,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:35,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:35,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:35,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:35,840 INFO L87 Difference]: Start difference. First operand 88 states and 194 transitions. Second operand 12 states. [2019-12-27 04:38:36,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:36,019 INFO L93 Difference]: Finished difference Result 108 states and 224 transitions. [2019-12-27 04:38:36,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:38:36,020 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:36,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:36,021 INFO L225 Difference]: With dead ends: 108 [2019-12-27 04:38:36,021 INFO L226 Difference]: Without dead ends: 107 [2019-12-27 04:38:36,022 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:38:36,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-27 04:38:36,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2019-12-27 04:38:36,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-27 04:38:36,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-27 04:38:36,025 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-27 04:38:36,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:36,026 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-27 04:38:36,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:36,026 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-27 04:38:36,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:36,027 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:36,027 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:36,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:36,230 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:36,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:36,230 INFO L82 PathProgramCache]: Analyzing trace with hash -2065667792, now seen corresponding path program 5 times [2019-12-27 04:38:36,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:36,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568496539] [2019-12-27 04:38:36,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:36,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568496539] [2019-12-27 04:38:36,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743069515] [2019-12-27 04:38:36,309 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:36,354 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:38:36,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:36,355 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:36,356 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:36,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:36,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:36,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587986759] [2019-12-27 04:38:36,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:36,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:36,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:36,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:36,473 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 14 states. [2019-12-27 04:38:36,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:36,641 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-27 04:38:36,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 04:38:36,642 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-27 04:38:36,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:36,643 INFO L225 Difference]: With dead ends: 107 [2019-12-27 04:38:36,643 INFO L226 Difference]: Without dead ends: 106 [2019-12-27 04:38:36,644 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2019-12-27 04:38:36,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-27 04:38:36,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2019-12-27 04:38:36,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-27 04:38:36,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-27 04:38:36,649 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-27 04:38:36,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:36,650 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-27 04:38:36,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:36,650 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-27 04:38:36,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:36,653 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:36,653 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:36,864 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:36,864 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:36,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:36,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1717033399, now seen corresponding path program 6 times [2019-12-27 04:38:36,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:36,865 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747111541] [2019-12-27 04:38:36,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:36,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747111541] [2019-12-27 04:38:36,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982016455] [2019-12-27 04:38:36,962 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:37,009 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 04:38:37,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:37,010 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 04:38:37,011 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:37,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 04:38:37,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 15 [2019-12-27 04:38:37,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316752257] [2019-12-27 04:38:37,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 04:38:37,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:37,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 04:38:37,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-12-27 04:38:37,116 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 8 states. [2019-12-27 04:38:37,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:37,144 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2019-12-27 04:38:37,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 04:38:37,145 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 04:38:37,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:37,147 INFO L225 Difference]: With dead ends: 124 [2019-12-27 04:38:37,147 INFO L226 Difference]: Without dead ends: 115 [2019-12-27 04:38:37,147 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-12-27 04:38:37,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-27 04:38:37,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2019-12-27 04:38:37,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-27 04:38:37,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 274 transitions. [2019-12-27 04:38:37,152 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 274 transitions. Word has length 12 [2019-12-27 04:38:37,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:37,153 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 274 transitions. [2019-12-27 04:38:37,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 04:38:37,153 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 274 transitions. [2019-12-27 04:38:37,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:37,154 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:37,154 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:37,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:37,363 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:37,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:37,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1717034515, now seen corresponding path program 14 times [2019-12-27 04:38:37,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:37,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274562879] [2019-12-27 04:38:37,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:37,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274562879] [2019-12-27 04:38:37,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659262201] [2019-12-27 04:38:37,473 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:37,514 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:37,515 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:37,515 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:38:37,516 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:37,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:37,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:37,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515320774] [2019-12-27 04:38:37,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:37,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:37,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:37,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:37,614 INFO L87 Difference]: Start difference. First operand 115 states and 274 transitions. Second operand 14 states. [2019-12-27 04:38:37,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:37,730 INFO L93 Difference]: Finished difference Result 139 states and 317 transitions. [2019-12-27 04:38:37,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 04:38:37,734 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:37,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:37,735 INFO L225 Difference]: With dead ends: 139 [2019-12-27 04:38:37,735 INFO L226 Difference]: Without dead ends: 138 [2019-12-27 04:38:37,736 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2019-12-27 04:38:37,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-12-27 04:38:37,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 117. [2019-12-27 04:38:37,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-12-27 04:38:37,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 279 transitions. [2019-12-27 04:38:37,741 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 279 transitions. Word has length 12 [2019-12-27 04:38:37,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:37,741 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 279 transitions. [2019-12-27 04:38:37,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:37,741 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 279 transitions. [2019-12-27 04:38:37,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:37,743 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:37,743 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:37,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:37,944 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:37,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:37,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1717068150, now seen corresponding path program 15 times [2019-12-27 04:38:37,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:37,945 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106458547] [2019-12-27 04:38:37,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:38,036 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106458547] [2019-12-27 04:38:38,036 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614333275] [2019-12-27 04:38:38,037 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:38,103 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:38,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:38,104 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:38,106 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:38,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:38,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:38,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469729628] [2019-12-27 04:38:38,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:38,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:38,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:38,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:38,261 INFO L87 Difference]: Start difference. First operand 117 states and 279 transitions. Second operand 14 states. [2019-12-27 04:38:38,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:38,553 INFO L93 Difference]: Finished difference Result 147 states and 334 transitions. [2019-12-27 04:38:38,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:38,554 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:38,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:38,555 INFO L225 Difference]: With dead ends: 147 [2019-12-27 04:38:38,555 INFO L226 Difference]: Without dead ends: 146 [2019-12-27 04:38:38,555 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2019-12-27 04:38:38,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-27 04:38:38,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 118. [2019-12-27 04:38:38,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-12-27 04:38:38,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 283 transitions. [2019-12-27 04:38:38,559 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 283 transitions. Word has length 12 [2019-12-27 04:38:38,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:38,561 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 283 transitions. [2019-12-27 04:38:38,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:38,561 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 283 transitions. [2019-12-27 04:38:38,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:38,561 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:38,562 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:38,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:38,765 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:38,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:38,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1717067995, now seen corresponding path program 16 times [2019-12-27 04:38:38,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:38,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829113573] [2019-12-27 04:38:38,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:38,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829113573] [2019-12-27 04:38:38,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212525726] [2019-12-27 04:38:38,837 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:38,889 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:38,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:38,890 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:38,891 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:39,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:39,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:39,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:39,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704457065] [2019-12-27 04:38:39,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:39,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:39,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:39,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:39,394 INFO L87 Difference]: Start difference. First operand 118 states and 283 transitions. Second operand 14 states. [2019-12-27 04:38:40,050 WARN L192 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2019-12-27 04:38:40,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:40,122 INFO L93 Difference]: Finished difference Result 150 states and 340 transitions. [2019-12-27 04:38:40,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:40,122 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:40,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:40,123 INFO L225 Difference]: With dead ends: 150 [2019-12-27 04:38:40,123 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 04:38:40,123 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:40,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 04:38:40,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 119. [2019-12-27 04:38:40,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-12-27 04:38:40,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 284 transitions. [2019-12-27 04:38:40,129 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 284 transitions. Word has length 12 [2019-12-27 04:38:40,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:40,129 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 284 transitions. [2019-12-27 04:38:40,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:40,129 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 284 transitions. [2019-12-27 04:38:40,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:40,130 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:40,130 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:40,334 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:40,334 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:40,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:40,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110835, now seen corresponding path program 17 times [2019-12-27 04:38:40,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:40,335 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589076930] [2019-12-27 04:38:40,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:40,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589076930] [2019-12-27 04:38:40,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775084717] [2019-12-27 04:38:40,423 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:40,462 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:40,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:40,463 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:40,464 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:40,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:40,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:40,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374734170] [2019-12-27 04:38:40,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:40,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:40,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:40,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:40,570 INFO L87 Difference]: Start difference. First operand 119 states and 284 transitions. Second operand 14 states. [2019-12-27 04:38:40,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:40,798 INFO L93 Difference]: Finished difference Result 151 states and 339 transitions. [2019-12-27 04:38:40,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 04:38:40,799 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:40,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:40,801 INFO L225 Difference]: With dead ends: 151 [2019-12-27 04:38:40,801 INFO L226 Difference]: Without dead ends: 149 [2019-12-27 04:38:40,802 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:40,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-12-27 04:38:40,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 125. [2019-12-27 04:38:40,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-12-27 04:38:40,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 305 transitions. [2019-12-27 04:38:40,806 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 305 transitions. Word has length 12 [2019-12-27 04:38:40,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:40,806 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 305 transitions. [2019-12-27 04:38:40,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:40,807 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 305 transitions. [2019-12-27 04:38:40,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:40,807 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:40,807 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:41,010 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:41,011 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:41,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:41,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110680, now seen corresponding path program 18 times [2019-12-27 04:38:41,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:41,012 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988148509] [2019-12-27 04:38:41,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:41,105 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988148509] [2019-12-27 04:38:41,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737633274] [2019-12-27 04:38:41,106 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:41,159 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:38:41,159 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:41,160 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:41,164 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:41,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:41,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:41,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079213892] [2019-12-27 04:38:41,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:41,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:41,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:41,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:41,652 INFO L87 Difference]: Start difference. First operand 125 states and 305 transitions. Second operand 14 states. [2019-12-27 04:38:41,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:41,971 INFO L93 Difference]: Finished difference Result 166 states and 375 transitions. [2019-12-27 04:38:41,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:41,971 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:41,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:41,972 INFO L225 Difference]: With dead ends: 166 [2019-12-27 04:38:41,972 INFO L226 Difference]: Without dead ends: 164 [2019-12-27 04:38:41,973 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2019-12-27 04:38:41,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-12-27 04:38:41,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 123. [2019-12-27 04:38:41,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-12-27 04:38:41,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 297 transitions. [2019-12-27 04:38:41,977 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 297 transitions. Word has length 12 [2019-12-27 04:38:41,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:41,978 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 297 transitions. [2019-12-27 04:38:41,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:41,978 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 297 transitions. [2019-12-27 04:38:41,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:41,978 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:41,979 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:42,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:42,179 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:42,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:42,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1718106030, now seen corresponding path program 19 times [2019-12-27 04:38:42,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:42,180 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545988762] [2019-12-27 04:38:42,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:42,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545988762] [2019-12-27 04:38:42,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609921053] [2019-12-27 04:38:42,253 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:42,297 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:42,298 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:42,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:42,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:42,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132360253] [2019-12-27 04:38:42,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:42,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:42,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:42,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:42,449 INFO L87 Difference]: Start difference. First operand 123 states and 297 transitions. Second operand 14 states. [2019-12-27 04:38:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:43,205 INFO L93 Difference]: Finished difference Result 162 states and 367 transitions. [2019-12-27 04:38:43,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:43,210 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:43,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:43,211 INFO L225 Difference]: With dead ends: 162 [2019-12-27 04:38:43,211 INFO L226 Difference]: Without dead ends: 161 [2019-12-27 04:38:43,212 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-12-27 04:38:43,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-27 04:38:43,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 124. [2019-12-27 04:38:43,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 04:38:43,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 301 transitions. [2019-12-27 04:38:43,217 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 301 transitions. Word has length 12 [2019-12-27 04:38:43,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:43,217 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 301 transitions. [2019-12-27 04:38:43,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:43,218 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 301 transitions. [2019-12-27 04:38:43,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:43,218 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:43,218 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:43,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:43,423 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:43,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:43,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1718105875, now seen corresponding path program 20 times [2019-12-27 04:38:43,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:43,424 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569799565] [2019-12-27 04:38:43,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:43,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:43,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569799565] [2019-12-27 04:38:43,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522187808] [2019-12-27 04:38:43,549 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:43,590 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:43,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:43,591 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:43,591 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:43,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:43,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:43,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317805480] [2019-12-27 04:38:43,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:43,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:43,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:43,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:43,727 INFO L87 Difference]: Start difference. First operand 124 states and 301 transitions. Second operand 14 states. [2019-12-27 04:38:43,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:43,980 INFO L93 Difference]: Finished difference Result 153 states and 352 transitions. [2019-12-27 04:38:43,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:43,981 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:43,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:43,982 INFO L225 Difference]: With dead ends: 153 [2019-12-27 04:38:43,982 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 04:38:43,982 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-27 04:38:43,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 04:38:43,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 124. [2019-12-27 04:38:43,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-27 04:38:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 298 transitions. [2019-12-27 04:38:43,988 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 298 transitions. Word has length 12 [2019-12-27 04:38:43,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:43,989 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 298 transitions. [2019-12-27 04:38:43,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:43,989 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 298 transitions. [2019-12-27 04:38:43,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:43,989 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:43,990 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:44,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:44,191 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:44,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:44,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429265, now seen corresponding path program 21 times [2019-12-27 04:38:44,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:44,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786150301] [2019-12-27 04:38:44,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:44,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786150301] [2019-12-27 04:38:44,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515007936] [2019-12-27 04:38:44,255 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:44,294 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:38:44,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:44,295 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 04:38:44,296 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:44,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:44,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:44,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:44,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73270211] [2019-12-27 04:38:44,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:44,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:44,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:44,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:44,395 INFO L87 Difference]: Start difference. First operand 124 states and 298 transitions. Second operand 14 states. [2019-12-27 04:38:44,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:44,769 INFO L93 Difference]: Finished difference Result 184 states and 407 transitions. [2019-12-27 04:38:44,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:38:44,769 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:44,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:44,772 INFO L225 Difference]: With dead ends: 184 [2019-12-27 04:38:44,772 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 04:38:44,772 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2019-12-27 04:38:44,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 04:38:44,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 127. [2019-12-27 04:38:44,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-27 04:38:44,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 310 transitions. [2019-12-27 04:38:44,777 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 310 transitions. Word has length 12 [2019-12-27 04:38:44,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:44,777 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 310 transitions. [2019-12-27 04:38:44,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:44,777 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 310 transitions. [2019-12-27 04:38:44,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:44,778 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:44,778 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:44,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:44,981 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:44,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:44,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429110, now seen corresponding path program 22 times [2019-12-27 04:38:44,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:44,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236541721] [2019-12-27 04:38:44,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:45,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236541721] [2019-12-27 04:38:45,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122170187] [2019-12-27 04:38:45,050 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:45,110 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:45,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:45,111 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:45,111 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:45,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:45,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:45,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276685580] [2019-12-27 04:38:45,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:45,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:45,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:45,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:45,195 INFO L87 Difference]: Start difference. First operand 127 states and 310 transitions. Second operand 14 states. [2019-12-27 04:38:45,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:45,517 INFO L93 Difference]: Finished difference Result 177 states and 400 transitions. [2019-12-27 04:38:45,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:38:45,517 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:45,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:45,519 INFO L225 Difference]: With dead ends: 177 [2019-12-27 04:38:45,519 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 04:38:45,520 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2019-12-27 04:38:45,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 04:38:45,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 128. [2019-12-27 04:38:45,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-27 04:38:45,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 311 transitions. [2019-12-27 04:38:45,525 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 311 transitions. Word has length 12 [2019-12-27 04:38:45,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:45,525 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 311 transitions. [2019-12-27 04:38:45,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:45,525 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 311 transitions. [2019-12-27 04:38:45,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:45,526 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:45,526 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:45,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:45,729 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:45,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:45,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1750285115, now seen corresponding path program 23 times [2019-12-27 04:38:45,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:45,730 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660307694] [2019-12-27 04:38:45,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:45,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:45,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660307694] [2019-12-27 04:38:45,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747454682] [2019-12-27 04:38:45,792 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:45,842 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:45,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:45,843 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:45,843 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:45,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:45,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:45,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614409674] [2019-12-27 04:38:45,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:45,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:45,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:45,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:45,931 INFO L87 Difference]: Start difference. First operand 128 states and 311 transitions. Second operand 14 states. [2019-12-27 04:38:46,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:46,193 INFO L93 Difference]: Finished difference Result 187 states and 421 transitions. [2019-12-27 04:38:46,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:38:46,194 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:46,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:46,195 INFO L225 Difference]: With dead ends: 187 [2019-12-27 04:38:46,195 INFO L226 Difference]: Without dead ends: 185 [2019-12-27 04:38:46,195 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-27 04:38:46,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-12-27 04:38:46,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 132. [2019-12-27 04:38:46,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-12-27 04:38:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2019-12-27 04:38:46,200 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2019-12-27 04:38:46,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:46,200 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2019-12-27 04:38:46,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:46,200 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2019-12-27 04:38:46,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:46,201 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:46,201 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:46,404 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:46,404 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:46,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:46,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1750284960, now seen corresponding path program 24 times [2019-12-27 04:38:46,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:46,405 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080804916] [2019-12-27 04:38:46,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:46,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080804916] [2019-12-27 04:38:46,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988935010] [2019-12-27 04:38:46,471 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:46,509 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:38:46,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:46,510 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:46,510 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:46,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:46,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:46,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397590663] [2019-12-27 04:38:46,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:46,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:46,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:46,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:46,585 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 14 states. [2019-12-27 04:38:46,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:46,831 INFO L93 Difference]: Finished difference Result 185 states and 422 transitions. [2019-12-27 04:38:46,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 04:38:46,832 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:46,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:46,833 INFO L225 Difference]: With dead ends: 185 [2019-12-27 04:38:46,833 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 04:38:46,833 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:46,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 04:38:46,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 131. [2019-12-27 04:38:46,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 04:38:46,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 323 transitions. [2019-12-27 04:38:46,851 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 323 transitions. Word has length 12 [2019-12-27 04:38:46,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:46,851 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 323 transitions. [2019-12-27 04:38:46,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:46,852 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 323 transitions. [2019-12-27 04:38:46,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:46,852 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:46,852 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:47,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:47,053 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:47,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:47,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280310, now seen corresponding path program 25 times [2019-12-27 04:38:47,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:47,054 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201413473] [2019-12-27 04:38:47,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:47,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201413473] [2019-12-27 04:38:47,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560396682] [2019-12-27 04:38:47,123 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:47,169 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:47,172 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:47,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:47,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:47,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284096901] [2019-12-27 04:38:47,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:47,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:47,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:47,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:47,259 INFO L87 Difference]: Start difference. First operand 131 states and 323 transitions. Second operand 14 states. [2019-12-27 04:38:47,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:47,560 INFO L93 Difference]: Finished difference Result 179 states and 406 transitions. [2019-12-27 04:38:47,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:38:47,560 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:47,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:47,561 INFO L225 Difference]: With dead ends: 179 [2019-12-27 04:38:47,561 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 04:38:47,562 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2019-12-27 04:38:47,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 04:38:47,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 130. [2019-12-27 04:38:47,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-27 04:38:47,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 319 transitions. [2019-12-27 04:38:47,566 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 319 transitions. Word has length 12 [2019-12-27 04:38:47,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:47,566 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 319 transitions. [2019-12-27 04:38:47,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:47,566 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 319 transitions. [2019-12-27 04:38:47,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:47,567 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:47,567 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:47,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:47,771 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:47,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135351, now seen corresponding path program 26 times [2019-12-27 04:38:47,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:47,772 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413454868] [2019-12-27 04:38:47,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:47,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413454868] [2019-12-27 04:38:47,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764853769] [2019-12-27 04:38:47,849 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:47,893 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:47,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:47,894 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:47,894 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:48,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:48,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:48,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:48,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229475991] [2019-12-27 04:38:48,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:48,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:48,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:48,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:48,011 INFO L87 Difference]: Start difference. First operand 130 states and 319 transitions. Second operand 14 states. [2019-12-27 04:38:48,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:48,310 INFO L93 Difference]: Finished difference Result 175 states and 398 transitions. [2019-12-27 04:38:48,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 04:38:48,311 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:48,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:48,313 INFO L225 Difference]: With dead ends: 175 [2019-12-27 04:38:48,313 INFO L226 Difference]: Without dead ends: 174 [2019-12-27 04:38:48,313 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:48,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-27 04:38:48,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 128. [2019-12-27 04:38:48,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-12-27 04:38:48,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 311 transitions. [2019-12-27 04:38:48,320 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 311 transitions. Word has length 12 [2019-12-27 04:38:48,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:48,320 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 311 transitions. [2019-12-27 04:38:48,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:48,321 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 311 transitions. [2019-12-27 04:38:48,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:48,322 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:48,322 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:48,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:48,527 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:48,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:48,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1547284461, now seen corresponding path program 27 times [2019-12-27 04:38:48,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:48,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090732834] [2019-12-27 04:38:48,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:48,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090732834] [2019-12-27 04:38:48,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978178254] [2019-12-27 04:38:48,623 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:48,689 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:38:48,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:48,691 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:48,691 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:48,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:48,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:48,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205334238] [2019-12-27 04:38:48,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:48,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:48,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:48,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:48,788 INFO L87 Difference]: Start difference. First operand 128 states and 311 transitions. Second operand 14 states. [2019-12-27 04:38:49,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:49,042 INFO L93 Difference]: Finished difference Result 147 states and 334 transitions. [2019-12-27 04:38:49,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:38:49,043 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:49,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:49,044 INFO L225 Difference]: With dead ends: 147 [2019-12-27 04:38:49,044 INFO L226 Difference]: Without dead ends: 146 [2019-12-27 04:38:49,045 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2019-12-27 04:38:49,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-27 04:38:49,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 129. [2019-12-27 04:38:49,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-12-27 04:38:49,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 303 transitions. [2019-12-27 04:38:49,050 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 303 transitions. Word has length 12 [2019-12-27 04:38:49,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:49,050 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 303 transitions. [2019-12-27 04:38:49,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:49,050 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 303 transitions. [2019-12-27 04:38:49,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:49,051 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:49,051 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:49,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:49,254 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:49,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:49,255 INFO L82 PathProgramCache]: Analyzing trace with hash 388808531, now seen corresponding path program 6 times [2019-12-27 04:38:49,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:49,255 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545467649] [2019-12-27 04:38:49,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:49,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:49,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545467649] [2019-12-27 04:38:49,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010742127] [2019-12-27 04:38:49,341 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:49,385 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 04:38:49,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:49,387 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 04:38:49,387 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:49,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 04:38:49,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 15 [2019-12-27 04:38:49,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401925153] [2019-12-27 04:38:49,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 04:38:49,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:49,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 04:38:49,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-12-27 04:38:49,467 INFO L87 Difference]: Start difference. First operand 129 states and 303 transitions. Second operand 8 states. [2019-12-27 04:38:49,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:49,487 INFO L93 Difference]: Finished difference Result 161 states and 374 transitions. [2019-12-27 04:38:49,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 04:38:49,488 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 04:38:49,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:49,489 INFO L225 Difference]: With dead ends: 161 [2019-12-27 04:38:49,490 INFO L226 Difference]: Without dead ends: 154 [2019-12-27 04:38:49,490 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-12-27 04:38:49,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-12-27 04:38:49,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2019-12-27 04:38:49,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 04:38:49,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 359 transitions. [2019-12-27 04:38:49,495 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 359 transitions. Word has length 12 [2019-12-27 04:38:49,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:49,496 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 359 transitions. [2019-12-27 04:38:49,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 04:38:49,496 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 359 transitions. [2019-12-27 04:38:49,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:49,496 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:49,496 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:49,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:49,700 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:49,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:49,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1688429421, now seen corresponding path program 28 times [2019-12-27 04:38:49,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:49,702 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036823876] [2019-12-27 04:38:49,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:49,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036823876] [2019-12-27 04:38:49,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785401309] [2019-12-27 04:38:49,787 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:49,827 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:49,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:49,828 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:49,829 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:49,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:49,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:49,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698759834] [2019-12-27 04:38:49,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:49,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:49,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:49,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:49,935 INFO L87 Difference]: Start difference. First operand 154 states and 359 transitions. Second operand 16 states. [2019-12-27 04:38:50,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:50,233 INFO L93 Difference]: Finished difference Result 179 states and 407 transitions. [2019-12-27 04:38:50,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:50,234 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:50,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:50,236 INFO L225 Difference]: With dead ends: 179 [2019-12-27 04:38:50,236 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 04:38:50,237 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-12-27 04:38:50,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 04:38:50,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 153. [2019-12-27 04:38:50,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 04:38:50,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 359 transitions. [2019-12-27 04:38:50,242 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 359 transitions. Word has length 13 [2019-12-27 04:38:50,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:50,242 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 359 transitions. [2019-12-27 04:38:50,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:50,242 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 359 transitions. [2019-12-27 04:38:50,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:50,243 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:50,243 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:50,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:50,446 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:50,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:50,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1688463056, now seen corresponding path program 29 times [2019-12-27 04:38:50,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:50,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574992950] [2019-12-27 04:38:50,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:50,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574992950] [2019-12-27 04:38:50,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005945009] [2019-12-27 04:38:50,540 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:50,592 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:38:50,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:50,593 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:50,594 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:50,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:50,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:50,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977865865] [2019-12-27 04:38:50,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:50,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:50,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:50,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:50,737 INFO L87 Difference]: Start difference. First operand 153 states and 359 transitions. Second operand 16 states. [2019-12-27 04:38:51,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:51,085 INFO L93 Difference]: Finished difference Result 189 states and 429 transitions. [2019-12-27 04:38:51,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 04:38:51,086 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:51,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:51,087 INFO L225 Difference]: With dead ends: 189 [2019-12-27 04:38:51,087 INFO L226 Difference]: Without dead ends: 188 [2019-12-27 04:38:51,087 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2019-12-27 04:38:51,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-12-27 04:38:51,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 155. [2019-12-27 04:38:51,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-27 04:38:51,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 367 transitions. [2019-12-27 04:38:51,092 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 367 transitions. Word has length 13 [2019-12-27 04:38:51,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:51,092 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 367 transitions. [2019-12-27 04:38:51,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:51,092 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 367 transitions. [2019-12-27 04:38:51,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:51,093 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:51,093 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:51,296 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:51,296 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:51,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:51,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1688462901, now seen corresponding path program 30 times [2019-12-27 04:38:51,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:51,297 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793566902] [2019-12-27 04:38:51,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:51,384 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793566902] [2019-12-27 04:38:51,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836510735] [2019-12-27 04:38:51,385 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:51,440 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:38:51,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:51,442 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:51,442 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:51,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:51,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:51,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:51,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90045442] [2019-12-27 04:38:51,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:51,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:51,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:51,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:51,803 INFO L87 Difference]: Start difference. First operand 155 states and 367 transitions. Second operand 16 states. [2019-12-27 04:38:52,362 WARN L192 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2019-12-27 04:38:52,703 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2019-12-27 04:38:52,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:52,827 INFO L93 Difference]: Finished difference Result 189 states and 430 transitions. [2019-12-27 04:38:52,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 04:38:52,828 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:52,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:52,829 INFO L225 Difference]: With dead ends: 189 [2019-12-27 04:38:52,829 INFO L226 Difference]: Without dead ends: 186 [2019-12-27 04:38:52,830 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2019-12-27 04:38:52,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-12-27 04:38:52,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 155. [2019-12-27 04:38:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-27 04:38:52,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 366 transitions. [2019-12-27 04:38:52,837 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 366 transitions. Word has length 13 [2019-12-27 04:38:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:52,839 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 366 transitions. [2019-12-27 04:38:52,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:52,840 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 366 transitions. [2019-12-27 04:38:52,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:52,841 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:52,841 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:53,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:53,042 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:53,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:53,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505741, now seen corresponding path program 31 times [2019-12-27 04:38:53,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:53,043 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95074005] [2019-12-27 04:38:53,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:53,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:53,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:53,134 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95074005] [2019-12-27 04:38:53,134 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147134851] [2019-12-27 04:38:53,134 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:53,179 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:53,180 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:53,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:53,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:53,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083030341] [2019-12-27 04:38:53,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:53,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:53,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:53,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:53,297 INFO L87 Difference]: Start difference. First operand 155 states and 366 transitions. Second operand 16 states. [2019-12-27 04:38:53,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:53,681 INFO L93 Difference]: Finished difference Result 198 states and 450 transitions. [2019-12-27 04:38:53,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:38:53,681 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:53,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:53,683 INFO L225 Difference]: With dead ends: 198 [2019-12-27 04:38:53,683 INFO L226 Difference]: Without dead ends: 196 [2019-12-27 04:38:53,684 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2019-12-27 04:38:53,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-12-27 04:38:53,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 162. [2019-12-27 04:38:53,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-27 04:38:53,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 394 transitions. [2019-12-27 04:38:53,689 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 394 transitions. Word has length 13 [2019-12-27 04:38:53,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:53,689 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 394 transitions. [2019-12-27 04:38:53,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:53,690 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 394 transitions. [2019-12-27 04:38:53,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:53,690 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:53,690 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:53,893 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:53,894 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:53,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:53,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505586, now seen corresponding path program 32 times [2019-12-27 04:38:53,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:53,895 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865536527] [2019-12-27 04:38:53,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:53,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:53,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865536527] [2019-12-27 04:38:53,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640192667] [2019-12-27 04:38:53,971 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:54,017 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:54,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:54,018 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:54,019 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:54,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:54,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:54,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214710126] [2019-12-27 04:38:54,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:54,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:54,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:54,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:54,851 INFO L87 Difference]: Start difference. First operand 162 states and 394 transitions. Second operand 16 states. [2019-12-27 04:38:55,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:55,812 INFO L93 Difference]: Finished difference Result 218 states and 494 transitions. [2019-12-27 04:38:55,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:38:55,812 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:55,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:55,814 INFO L225 Difference]: With dead ends: 218 [2019-12-27 04:38:55,815 INFO L226 Difference]: Without dead ends: 217 [2019-12-27 04:38:55,815 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=264, Invalid=547, Unknown=1, NotChecked=0, Total=812 [2019-12-27 04:38:55,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-12-27 04:38:55,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 162. [2019-12-27 04:38:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-27 04:38:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 394 transitions. [2019-12-27 04:38:55,821 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 394 transitions. Word has length 13 [2019-12-27 04:38:55,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:55,821 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 394 transitions. [2019-12-27 04:38:55,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:55,821 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 394 transitions. [2019-12-27 04:38:55,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:55,822 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:55,822 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:56,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:56,025 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:56,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:56,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500936, now seen corresponding path program 33 times [2019-12-27 04:38:56,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:56,026 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577069467] [2019-12-27 04:38:56,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:56,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577069467] [2019-12-27 04:38:56,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213628526] [2019-12-27 04:38:56,115 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:38:56,175 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:38:56,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:56,176 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:56,177 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:58,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:58,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:58,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739842041] [2019-12-27 04:38:58,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:58,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:58,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:58,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=174, Unknown=5, NotChecked=0, Total=240 [2019-12-27 04:38:58,826 INFO L87 Difference]: Start difference. First operand 162 states and 394 transitions. Second operand 16 states. [2019-12-27 04:38:59,419 WARN L192 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-27 04:38:59,649 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2019-12-27 04:39:00,474 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-27 04:39:00,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:00,888 INFO L93 Difference]: Finished difference Result 215 states and 488 transitions. [2019-12-27 04:39:00,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:39:00,888 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:00,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:00,889 INFO L225 Difference]: With dead ends: 215 [2019-12-27 04:39:00,889 INFO L226 Difference]: Without dead ends: 214 [2019-12-27 04:39:00,890 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=196, Invalid=449, Unknown=5, NotChecked=0, Total=650 [2019-12-27 04:39:00,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-12-27 04:39:00,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 163. [2019-12-27 04:39:00,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-12-27 04:39:00,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 398 transitions. [2019-12-27 04:39:00,895 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 398 transitions. Word has length 13 [2019-12-27 04:39:00,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:00,895 INFO L462 AbstractCegarLoop]: Abstraction has 163 states and 398 transitions. [2019-12-27 04:39:00,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:00,896 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 398 transitions. [2019-12-27 04:39:00,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:00,896 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:00,896 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:01,097 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:01,097 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:01,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:01,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500781, now seen corresponding path program 34 times [2019-12-27 04:39:01,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:01,098 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828146254] [2019-12-27 04:39:01,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:01,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828146254] [2019-12-27 04:39:01,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607838842] [2019-12-27 04:39:01,182 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:01,223 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:01,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:01,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:01,225 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:02,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:02,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:02,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838021287] [2019-12-27 04:39:02,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:02,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:02,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:02,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=177, Unknown=1, NotChecked=0, Total=240 [2019-12-27 04:39:02,373 INFO L87 Difference]: Start difference. First operand 163 states and 398 transitions. Second operand 16 states. [2019-12-27 04:39:04,477 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-27 04:39:05,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:05,068 INFO L93 Difference]: Finished difference Result 207 states and 474 transitions. [2019-12-27 04:39:05,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:05,068 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:05,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:05,071 INFO L225 Difference]: With dead ends: 207 [2019-12-27 04:39:05,071 INFO L226 Difference]: Without dead ends: 203 [2019-12-27 04:39:05,072 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=230, Invalid=522, Unknown=4, NotChecked=0, Total=756 [2019-12-27 04:39:05,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-27 04:39:05,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 162. [2019-12-27 04:39:05,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-27 04:39:05,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 393 transitions. [2019-12-27 04:39:05,076 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 393 transitions. Word has length 13 [2019-12-27 04:39:05,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:05,076 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 393 transitions. [2019-12-27 04:39:05,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:05,076 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 393 transitions. [2019-12-27 04:39:05,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:05,077 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:05,077 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:05,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:05,280 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:05,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:05,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828821, now seen corresponding path program 35 times [2019-12-27 04:39:05,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:05,282 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891813429] [2019-12-27 04:39:05,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:05,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891813429] [2019-12-27 04:39:05,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730218891] [2019-12-27 04:39:05,359 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:05,403 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:05,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:05,404 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:05,404 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:05,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:05,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:05,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219705303] [2019-12-27 04:39:05,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:05,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:05,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:05,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:05,540 INFO L87 Difference]: Start difference. First operand 162 states and 393 transitions. Second operand 16 states. [2019-12-27 04:39:05,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:05,999 INFO L93 Difference]: Finished difference Result 231 states and 523 transitions. [2019-12-27 04:39:05,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:39:05,999 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:06,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:06,001 INFO L225 Difference]: With dead ends: 231 [2019-12-27 04:39:06,001 INFO L226 Difference]: Without dead ends: 229 [2019-12-27 04:39:06,002 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2019-12-27 04:39:06,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-27 04:39:06,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 166. [2019-12-27 04:39:06,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-12-27 04:39:06,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 409 transitions. [2019-12-27 04:39:06,007 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 409 transitions. Word has length 13 [2019-12-27 04:39:06,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:06,007 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 409 transitions. [2019-12-27 04:39:06,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:06,007 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 409 transitions. [2019-12-27 04:39:06,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:06,008 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:06,008 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:06,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:06,211 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:06,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:06,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824171, now seen corresponding path program 36 times [2019-12-27 04:39:06,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:06,212 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595101918] [2019-12-27 04:39:06,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:06,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:06,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595101918] [2019-12-27 04:39:06,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550104831] [2019-12-27 04:39:06,323 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:06,367 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:39:06,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:06,367 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:06,368 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:06,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:06,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:06,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119097979] [2019-12-27 04:39:06,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:06,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:06,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:06,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=178, Unknown=1, NotChecked=0, Total=240 [2019-12-27 04:39:06,997 INFO L87 Difference]: Start difference. First operand 166 states and 409 transitions. Second operand 16 states. [2019-12-27 04:39:07,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:07,423 INFO L93 Difference]: Finished difference Result 242 states and 549 transitions. [2019-12-27 04:39:07,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:39:07,424 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:07,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:07,425 INFO L225 Difference]: With dead ends: 242 [2019-12-27 04:39:07,425 INFO L226 Difference]: Without dead ends: 240 [2019-12-27 04:39:07,426 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=196, Invalid=453, Unknown=1, NotChecked=0, Total=650 [2019-12-27 04:39:07,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-12-27 04:39:07,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 168. [2019-12-27 04:39:07,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-12-27 04:39:07,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 417 transitions. [2019-12-27 04:39:07,431 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 417 transitions. Word has length 13 [2019-12-27 04:39:07,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:07,431 INFO L462 AbstractCegarLoop]: Abstraction has 168 states and 417 transitions. [2019-12-27 04:39:07,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:07,432 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 417 transitions. [2019-12-27 04:39:07,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:07,432 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:07,432 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:07,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:07,634 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:07,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:07,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824016, now seen corresponding path program 37 times [2019-12-27 04:39:07,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:07,635 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199399147] [2019-12-27 04:39:07,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:07,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199399147] [2019-12-27 04:39:07,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383076969] [2019-12-27 04:39:07,718 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:07,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:07,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:07,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:07,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:07,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418551828] [2019-12-27 04:39:07,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:07,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:07,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:07,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:07,916 INFO L87 Difference]: Start difference. First operand 168 states and 417 transitions. Second operand 16 states. [2019-12-27 04:39:08,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:08,426 INFO L93 Difference]: Finished difference Result 239 states and 543 transitions. [2019-12-27 04:39:08,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 04:39:08,427 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:08,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:08,428 INFO L225 Difference]: With dead ends: 239 [2019-12-27 04:39:08,429 INFO L226 Difference]: Without dead ends: 233 [2019-12-27 04:39:08,429 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2019-12-27 04:39:08,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-12-27 04:39:08,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 170. [2019-12-27 04:39:08,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-12-27 04:39:08,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 422 transitions. [2019-12-27 04:39:08,434 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 422 transitions. Word has length 13 [2019-12-27 04:39:08,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:08,434 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 422 transitions. [2019-12-27 04:39:08,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:08,435 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 422 transitions. [2019-12-27 04:39:08,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:08,435 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:08,435 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:08,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:08,639 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:08,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:08,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1721680021, now seen corresponding path program 38 times [2019-12-27 04:39:08,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:08,640 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345243156] [2019-12-27 04:39:08,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:08,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345243156] [2019-12-27 04:39:08,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178078612] [2019-12-27 04:39:08,731 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:08,769 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:39:08,770 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:08,771 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:08,772 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:09,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:09,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:09,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344343769] [2019-12-27 04:39:09,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:09,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:09,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:09,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:09,065 INFO L87 Difference]: Start difference. First operand 170 states and 422 transitions. Second operand 16 states. [2019-12-27 04:39:09,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:09,494 INFO L93 Difference]: Finished difference Result 230 states and 533 transitions. [2019-12-27 04:39:09,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:09,495 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:09,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:09,497 INFO L225 Difference]: With dead ends: 230 [2019-12-27 04:39:09,497 INFO L226 Difference]: Without dead ends: 229 [2019-12-27 04:39:09,498 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2019-12-27 04:39:09,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-27 04:39:09,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 171. [2019-12-27 04:39:09,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-12-27 04:39:09,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 426 transitions. [2019-12-27 04:39:09,502 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 426 transitions. Word has length 13 [2019-12-27 04:39:09,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:09,502 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 426 transitions. [2019-12-27 04:39:09,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:09,502 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 426 transitions. [2019-12-27 04:39:09,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:09,503 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:09,503 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:09,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:09,704 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:09,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:09,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1721679866, now seen corresponding path program 39 times [2019-12-27 04:39:09,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:09,705 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917412519] [2019-12-27 04:39:09,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:09,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:09,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917412519] [2019-12-27 04:39:09,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226775120] [2019-12-27 04:39:09,803 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:09,866 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:39:09,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:09,867 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:09,868 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:10,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:10,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:10,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110185836] [2019-12-27 04:39:10,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:10,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:10,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:10,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:10,079 INFO L87 Difference]: Start difference. First operand 171 states and 426 transitions. Second operand 16 states. [2019-12-27 04:39:10,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:10,508 INFO L93 Difference]: Finished difference Result 235 states and 545 transitions. [2019-12-27 04:39:10,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:39:10,508 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:10,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:10,510 INFO L225 Difference]: With dead ends: 235 [2019-12-27 04:39:10,510 INFO L226 Difference]: Without dead ends: 234 [2019-12-27 04:39:10,511 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2019-12-27 04:39:10,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-12-27 04:39:10,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 170. [2019-12-27 04:39:10,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-12-27 04:39:10,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 422 transitions. [2019-12-27 04:39:10,516 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 422 transitions. Word has length 13 [2019-12-27 04:39:10,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:10,516 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 422 transitions. [2019-12-27 04:39:10,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:10,516 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 422 transitions. [2019-12-27 04:39:10,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:10,517 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:10,517 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:10,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:10,720 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:10,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:10,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675216, now seen corresponding path program 40 times [2019-12-27 04:39:10,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:10,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798548991] [2019-12-27 04:39:10,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:10,809 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798548991] [2019-12-27 04:39:10,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217404303] [2019-12-27 04:39:10,810 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:10,854 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:10,854 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:10,855 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:10,856 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:13,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:13,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:13,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811779055] [2019-12-27 04:39:13,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:13,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:13,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:13,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:13,064 INFO L87 Difference]: Start difference. First operand 170 states and 422 transitions. Second operand 16 states. [2019-12-27 04:39:14,298 WARN L192 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-27 04:39:16,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:16,738 INFO L93 Difference]: Finished difference Result 224 states and 519 transitions. [2019-12-27 04:39:16,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:39:16,738 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:16,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:16,741 INFO L225 Difference]: With dead ends: 224 [2019-12-27 04:39:16,741 INFO L226 Difference]: Without dead ends: 223 [2019-12-27 04:39:16,741 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2019-12-27 04:39:16,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-27 04:39:16,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 168. [2019-12-27 04:39:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-12-27 04:39:16,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 416 transitions. [2019-12-27 04:39:16,745 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 416 transitions. Word has length 13 [2019-12-27 04:39:16,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:16,746 INFO L462 AbstractCegarLoop]: Abstraction has 168 states and 416 transitions. [2019-12-27 04:39:16,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:16,746 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 416 transitions. [2019-12-27 04:39:16,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:16,746 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:16,746 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:16,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:16,949 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:16,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:16,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118035, now seen corresponding path program 41 times [2019-12-27 04:39:16,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:16,950 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278385530] [2019-12-27 04:39:16,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:17,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278385530] [2019-12-27 04:39:17,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297294108] [2019-12-27 04:39:17,025 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:17,067 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:17,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:17,067 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:17,068 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:17,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:17,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:17,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:17,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108630192] [2019-12-27 04:39:17,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:17,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:17,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:17,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:17,179 INFO L87 Difference]: Start difference. First operand 168 states and 416 transitions. Second operand 16 states. [2019-12-27 04:39:17,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:17,471 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2019-12-27 04:39:17,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:39:17,471 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:17,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:17,473 INFO L225 Difference]: With dead ends: 182 [2019-12-27 04:39:17,473 INFO L226 Difference]: Without dead ends: 174 [2019-12-27 04:39:17,473 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2019-12-27 04:39:17,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-12-27 04:39:17,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 168. [2019-12-27 04:39:17,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-12-27 04:39:17,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 410 transitions. [2019-12-27 04:39:17,478 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 410 transitions. Word has length 13 [2019-12-27 04:39:17,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:17,478 INFO L462 AbstractCegarLoop]: Abstraction has 168 states and 410 transitions. [2019-12-27 04:39:17,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:17,478 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 410 transitions. [2019-12-27 04:39:17,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:17,479 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:17,479 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:17,682 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:17,682 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:17,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:17,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1571266990, now seen corresponding path program 42 times [2019-12-27 04:39:17,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:17,683 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556943890] [2019-12-27 04:39:17,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:17,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:17,755 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556943890] [2019-12-27 04:39:17,755 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546495323] [2019-12-27 04:39:17,755 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:17,799 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:39:17,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:17,800 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:17,801 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:17,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:17,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:17,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199807775] [2019-12-27 04:39:17,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:17,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:17,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:17,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:17,979 INFO L87 Difference]: Start difference. First operand 168 states and 410 transitions. Second operand 16 states. [2019-12-27 04:39:19,871 WARN L192 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-27 04:39:19,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:19,907 INFO L93 Difference]: Finished difference Result 232 states and 528 transitions. [2019-12-27 04:39:19,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:39:19,907 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:19,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:19,909 INFO L225 Difference]: With dead ends: 232 [2019-12-27 04:39:19,909 INFO L226 Difference]: Without dead ends: 227 [2019-12-27 04:39:19,910 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2019-12-27 04:39:19,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-27 04:39:19,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 170. [2019-12-27 04:39:19,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-12-27 04:39:19,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 417 transitions. [2019-12-27 04:39:19,914 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 417 transitions. Word has length 13 [2019-12-27 04:39:19,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:19,914 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 417 transitions. [2019-12-27 04:39:19,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:19,914 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 417 transitions. [2019-12-27 04:39:19,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:19,915 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:19,915 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:20,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:20,116 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:20,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:20,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1571267145, now seen corresponding path program 43 times [2019-12-27 04:39:20,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:20,117 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764475504] [2019-12-27 04:39:20,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:20,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764475504] [2019-12-27 04:39:20,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001084616] [2019-12-27 04:39:20,194 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:20,237 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:20,238 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:20,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:20,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:20,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264024631] [2019-12-27 04:39:20,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:20,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:20,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:20,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=177, Unknown=1, NotChecked=0, Total=240 [2019-12-27 04:39:20,959 INFO L87 Difference]: Start difference. First operand 170 states and 417 transitions. Second operand 16 states. [2019-12-27 04:39:23,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:23,022 INFO L93 Difference]: Finished difference Result 257 states and 585 transitions. [2019-12-27 04:39:23,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:23,022 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:23,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:23,024 INFO L225 Difference]: With dead ends: 257 [2019-12-27 04:39:23,024 INFO L226 Difference]: Without dead ends: 255 [2019-12-27 04:39:23,025 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=211, Invalid=488, Unknown=3, NotChecked=0, Total=702 [2019-12-27 04:39:23,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2019-12-27 04:39:23,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 174. [2019-12-27 04:39:23,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-12-27 04:39:23,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 433 transitions. [2019-12-27 04:39:23,029 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 433 transitions. Word has length 13 [2019-12-27 04:39:23,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:23,029 INFO L462 AbstractCegarLoop]: Abstraction has 174 states and 433 transitions. [2019-12-27 04:39:23,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:23,029 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 433 transitions. [2019-12-27 04:39:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:23,030 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:23,030 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:23,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:23,233 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:23,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:23,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271795, now seen corresponding path program 44 times [2019-12-27 04:39:23,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:23,234 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478189067] [2019-12-27 04:39:23,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:23,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478189067] [2019-12-27 04:39:23,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060631658] [2019-12-27 04:39:23,330 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:23,396 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:39:23,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:23,397 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:23,398 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:24,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:24,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:24,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616326883] [2019-12-27 04:39:24,075 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:24,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:24,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:24,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=179, Unknown=1, NotChecked=0, Total=240 [2019-12-27 04:39:24,076 INFO L87 Difference]: Start difference. First operand 174 states and 433 transitions. Second operand 16 states. [2019-12-27 04:39:24,612 WARN L192 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2019-12-27 04:39:25,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:25,851 INFO L93 Difference]: Finished difference Result 258 states and 586 transitions. [2019-12-27 04:39:25,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:39:25,851 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:25,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:25,853 INFO L225 Difference]: With dead ends: 258 [2019-12-27 04:39:25,853 INFO L226 Difference]: Without dead ends: 256 [2019-12-27 04:39:25,854 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=266, Invalid=601, Unknown=3, NotChecked=0, Total=870 [2019-12-27 04:39:25,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-12-27 04:39:25,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 176. [2019-12-27 04:39:25,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-12-27 04:39:25,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 441 transitions. [2019-12-27 04:39:25,857 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 441 transitions. Word has length 13 [2019-12-27 04:39:25,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:25,857 INFO L462 AbstractCegarLoop]: Abstraction has 176 states and 441 transitions. [2019-12-27 04:39:25,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:25,858 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 441 transitions. [2019-12-27 04:39:25,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:25,858 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:25,858 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:26,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:26,059 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:26,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:26,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735640, now seen corresponding path program 45 times [2019-12-27 04:39:26,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:26,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621287778] [2019-12-27 04:39:26,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:26,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:26,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621287778] [2019-12-27 04:39:26,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025875568] [2019-12-27 04:39:26,155 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:26,223 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:39:26,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:26,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:26,225 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:26,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:26,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:26,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:26,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746680751] [2019-12-27 04:39:26,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:26,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:26,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:26,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:26,367 INFO L87 Difference]: Start difference. First operand 176 states and 441 transitions. Second operand 16 states. [2019-12-27 04:39:26,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:26,764 INFO L93 Difference]: Finished difference Result 241 states and 555 transitions. [2019-12-27 04:39:26,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:39:26,765 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:26,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:26,767 INFO L225 Difference]: With dead ends: 241 [2019-12-27 04:39:26,767 INFO L226 Difference]: Without dead ends: 231 [2019-12-27 04:39:26,767 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=287, Invalid=705, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:39:26,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-12-27 04:39:26,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 176. [2019-12-27 04:39:26,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-12-27 04:39:26,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 437 transitions. [2019-12-27 04:39:26,773 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 437 transitions. Word has length 13 [2019-12-27 04:39:26,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:26,773 INFO L462 AbstractCegarLoop]: Abstraction has 176 states and 437 transitions. [2019-12-27 04:39:26,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:26,773 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 437 transitions. [2019-12-27 04:39:26,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:26,774 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:26,774 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:26,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:26,975 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:26,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:26,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735795, now seen corresponding path program 46 times [2019-12-27 04:39:26,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:26,976 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351383545] [2019-12-27 04:39:26,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:26,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:27,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351383545] [2019-12-27 04:39:27,056 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124756200] [2019-12-27 04:39:27,056 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:27,097 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:27,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:27,098 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:27,098 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:27,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:27,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:27,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351790759] [2019-12-27 04:39:27,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:27,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:27,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:27,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:27,202 INFO L87 Difference]: Start difference. First operand 176 states and 437 transitions. Second operand 16 states. [2019-12-27 04:39:27,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:27,581 INFO L93 Difference]: Finished difference Result 258 states and 590 transitions. [2019-12-27 04:39:27,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:39:27,581 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:27,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:27,583 INFO L225 Difference]: With dead ends: 258 [2019-12-27 04:39:27,584 INFO L226 Difference]: Without dead ends: 256 [2019-12-27 04:39:27,584 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2019-12-27 04:39:27,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-12-27 04:39:27,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 176. [2019-12-27 04:39:27,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-12-27 04:39:27,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 437 transitions. [2019-12-27 04:39:27,588 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 437 transitions. Word has length 13 [2019-12-27 04:39:27,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:27,589 INFO L462 AbstractCegarLoop]: Abstraction has 176 states and 437 transitions. [2019-12-27 04:39:27,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:27,589 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 437 transitions. [2019-12-27 04:39:27,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:27,589 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:27,589 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:27,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:27,792 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:27,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:27,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740445, now seen corresponding path program 47 times [2019-12-27 04:39:27,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:27,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613845867] [2019-12-27 04:39:27,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:27,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613845867] [2019-12-27 04:39:27,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775244788] [2019-12-27 04:39:27,868 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:27,909 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:27,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:27,910 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:27,911 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:28,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:28,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:28,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373788665] [2019-12-27 04:39:28,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:28,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:28,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:28,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:28,004 INFO L87 Difference]: Start difference. First operand 176 states and 437 transitions. Second operand 16 states. [2019-12-27 04:39:28,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:28,305 INFO L93 Difference]: Finished difference Result 258 states and 585 transitions. [2019-12-27 04:39:28,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:28,305 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:28,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:28,307 INFO L225 Difference]: With dead ends: 258 [2019-12-27 04:39:28,308 INFO L226 Difference]: Without dead ends: 256 [2019-12-27 04:39:28,308 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2019-12-27 04:39:28,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-12-27 04:39:28,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 175. [2019-12-27 04:39:28,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-12-27 04:39:28,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 434 transitions. [2019-12-27 04:39:28,313 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 434 transitions. Word has length 13 [2019-12-27 04:39:28,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:28,313 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 434 transitions. [2019-12-27 04:39:28,313 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:28,313 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 434 transitions. [2019-12-27 04:39:28,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:28,314 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:28,314 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:28,516 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:28,517 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:28,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:28,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740600, now seen corresponding path program 48 times [2019-12-27 04:39:28,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:28,518 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362519149] [2019-12-27 04:39:28,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:28,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:28,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362519149] [2019-12-27 04:39:28,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361647460] [2019-12-27 04:39:28,620 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:28,661 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:39:28,661 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:28,662 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:28,663 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:28,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:28,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:28,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218095455] [2019-12-27 04:39:28,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:28,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:28,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:28,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:28,757 INFO L87 Difference]: Start difference. First operand 175 states and 434 transitions. Second operand 16 states. [2019-12-27 04:39:29,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:29,151 INFO L93 Difference]: Finished difference Result 249 states and 566 transitions. [2019-12-27 04:39:29,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:39:29,151 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:29,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:29,153 INFO L225 Difference]: With dead ends: 249 [2019-12-27 04:39:29,154 INFO L226 Difference]: Without dead ends: 242 [2019-12-27 04:39:29,154 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2019-12-27 04:39:29,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-12-27 04:39:29,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 173. [2019-12-27 04:39:29,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-12-27 04:39:29,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 423 transitions. [2019-12-27 04:39:29,158 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 423 transitions. Word has length 13 [2019-12-27 04:39:29,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:29,158 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 423 transitions. [2019-12-27 04:39:29,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:29,158 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 423 transitions. [2019-12-27 04:39:29,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:29,159 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:29,159 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:29,360 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:29,360 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:29,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:29,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884595, now seen corresponding path program 49 times [2019-12-27 04:39:29,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:29,361 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711280760] [2019-12-27 04:39:29,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:29,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711280760] [2019-12-27 04:39:29,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128244444] [2019-12-27 04:39:29,437 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:29,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:29,479 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:29,480 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:29,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:29,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:29,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666319748] [2019-12-27 04:39:29,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:29,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:29,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:29,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:29,579 INFO L87 Difference]: Start difference. First operand 173 states and 423 transitions. Second operand 16 states. [2019-12-27 04:39:30,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:30,048 INFO L93 Difference]: Finished difference Result 240 states and 544 transitions. [2019-12-27 04:39:30,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:39:30,049 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:30,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:30,051 INFO L225 Difference]: With dead ends: 240 [2019-12-27 04:39:30,052 INFO L226 Difference]: Without dead ends: 238 [2019-12-27 04:39:30,052 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=254, Invalid=616, Unknown=0, NotChecked=0, Total=870 [2019-12-27 04:39:30,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-12-27 04:39:30,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 169. [2019-12-27 04:39:30,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-12-27 04:39:30,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 409 transitions. [2019-12-27 04:39:30,056 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 409 transitions. Word has length 13 [2019-12-27 04:39:30,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:30,056 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 409 transitions. [2019-12-27 04:39:30,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:30,056 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 409 transitions. [2019-12-27 04:39:30,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:30,057 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:30,057 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:30,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:30,260 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:30,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:30,261 INFO L82 PathProgramCache]: Analyzing trace with hash -573260427, now seen corresponding path program 50 times [2019-12-27 04:39:30,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:30,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132552770] [2019-12-27 04:39:30,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:30,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132552770] [2019-12-27 04:39:30,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999893377] [2019-12-27 04:39:30,332 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:30,377 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:39:30,377 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:30,378 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:30,379 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:30,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:30,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:30,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:30,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572210545] [2019-12-27 04:39:30,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:30,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:30,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:30,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:30,526 INFO L87 Difference]: Start difference. First operand 169 states and 409 transitions. Second operand 16 states. [2019-12-27 04:39:30,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:30,842 INFO L93 Difference]: Finished difference Result 180 states and 419 transitions. [2019-12-27 04:39:30,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:39:30,843 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:30,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:30,844 INFO L225 Difference]: With dead ends: 180 [2019-12-27 04:39:30,844 INFO L226 Difference]: Without dead ends: 178 [2019-12-27 04:39:30,845 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-12-27 04:39:30,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-12-27 04:39:30,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 161. [2019-12-27 04:39:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-27 04:39:30,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 393 transitions. [2019-12-27 04:39:30,849 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 393 transitions. Word has length 13 [2019-12-27 04:39:30,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:30,849 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 393 transitions. [2019-12-27 04:39:30,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:30,849 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 393 transitions. [2019-12-27 04:39:30,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:30,849 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:30,849 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:31,050 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:31,050 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:31,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:31,051 INFO L82 PathProgramCache]: Analyzing trace with hash -573265232, now seen corresponding path program 51 times [2019-12-27 04:39:31,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:31,051 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136135466] [2019-12-27 04:39:31,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:31,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136135466] [2019-12-27 04:39:31,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882557237] [2019-12-27 04:39:31,125 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:31,166 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:39:31,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:31,167 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 04:39:31,167 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:31,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:31,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:31,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:31,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136728100] [2019-12-27 04:39:31,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:31,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:31,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:31,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:31,258 INFO L87 Difference]: Start difference. First operand 161 states and 393 transitions. Second operand 16 states. [2019-12-27 04:39:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:31,473 INFO L93 Difference]: Finished difference Result 191 states and 438 transitions. [2019-12-27 04:39:31,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 04:39:31,474 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:31,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:31,476 INFO L225 Difference]: With dead ends: 191 [2019-12-27 04:39:31,476 INFO L226 Difference]: Without dead ends: 190 [2019-12-27 04:39:31,476 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:39:31,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-12-27 04:39:31,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 160. [2019-12-27 04:39:31,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-12-27 04:39:31,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2019-12-27 04:39:31,481 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 13 [2019-12-27 04:39:31,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:31,481 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2019-12-27 04:39:31,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:31,481 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2019-12-27 04:39:31,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:31,482 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:31,482 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:31,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:31,683 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:31,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:31,684 INFO L82 PathProgramCache]: Analyzing trace with hash -573414187, now seen corresponding path program 52 times [2019-12-27 04:39:31,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:31,684 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576436138] [2019-12-27 04:39:31,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:31,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576436138] [2019-12-27 04:39:31,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961245064] [2019-12-27 04:39:31,752 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:31,792 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:31,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:31,793 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:31,793 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:31,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:31,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:31,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339404539] [2019-12-27 04:39:31,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:31,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:31,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:31,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:31,901 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 16 states. [2019-12-27 04:39:32,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:32,261 INFO L93 Difference]: Finished difference Result 194 states and 441 transitions. [2019-12-27 04:39:32,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:39:32,262 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:32,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:32,263 INFO L225 Difference]: With dead ends: 194 [2019-12-27 04:39:32,264 INFO L226 Difference]: Without dead ends: 192 [2019-12-27 04:39:32,264 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2019-12-27 04:39:32,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-12-27 04:39:32,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 156. [2019-12-27 04:39:32,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 04:39:32,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 376 transitions. [2019-12-27 04:39:32,268 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 376 transitions. Word has length 13 [2019-12-27 04:39:32,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:32,268 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 376 transitions. [2019-12-27 04:39:32,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:32,269 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 376 transitions. [2019-12-27 04:39:32,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:32,269 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:32,269 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:32,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:32,472 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:32,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:32,473 INFO L82 PathProgramCache]: Analyzing trace with hash -716554982, now seen corresponding path program 53 times [2019-12-27 04:39:32,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:32,473 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304119639] [2019-12-27 04:39:32,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:32,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304119639] [2019-12-27 04:39:32,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348195131] [2019-12-27 04:39:32,547 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:32,587 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:32,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:32,588 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:32,589 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:32,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:32,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:32,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316494625] [2019-12-27 04:39:32,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:32,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:32,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:32,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:32,688 INFO L87 Difference]: Start difference. First operand 156 states and 376 transitions. Second operand 16 states. [2019-12-27 04:39:33,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:33,054 INFO L93 Difference]: Finished difference Result 218 states and 481 transitions. [2019-12-27 04:39:33,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:39:33,055 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:33,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:33,057 INFO L225 Difference]: With dead ends: 218 [2019-12-27 04:39:33,057 INFO L226 Difference]: Without dead ends: 217 [2019-12-27 04:39:33,057 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2019-12-27 04:39:33,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-12-27 04:39:33,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 154. [2019-12-27 04:39:33,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 04:39:33,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 367 transitions. [2019-12-27 04:39:33,061 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 367 transitions. Word has length 13 [2019-12-27 04:39:33,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:33,062 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 367 transitions. [2019-12-27 04:39:33,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:33,062 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 367 transitions. [2019-12-27 04:39:33,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:33,062 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:33,063 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:33,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:33,265 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:33,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:33,266 INFO L82 PathProgramCache]: Analyzing trace with hash -716555137, now seen corresponding path program 54 times [2019-12-27 04:39:33,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:33,266 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429877068] [2019-12-27 04:39:33,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:33,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429877068] [2019-12-27 04:39:33,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668644571] [2019-12-27 04:39:33,341 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:33,380 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:39:33,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:33,381 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:33,382 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:33,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:33,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:33,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946797997] [2019-12-27 04:39:33,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:33,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:33,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:33,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:33,478 INFO L87 Difference]: Start difference. First operand 154 states and 367 transitions. Second operand 16 states. [2019-12-27 04:39:33,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:33,770 INFO L93 Difference]: Finished difference Result 231 states and 505 transitions. [2019-12-27 04:39:33,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:33,770 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:33,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:33,771 INFO L225 Difference]: With dead ends: 231 [2019-12-27 04:39:33,772 INFO L226 Difference]: Without dead ends: 229 [2019-12-27 04:39:33,772 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2019-12-27 04:39:33,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-27 04:39:33,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 152. [2019-12-27 04:39:33,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 04:39:33,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 359 transitions. [2019-12-27 04:39:33,775 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 359 transitions. Word has length 13 [2019-12-27 04:39:33,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:33,775 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 359 transitions. [2019-12-27 04:39:33,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:33,775 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 359 transitions. [2019-12-27 04:39:33,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:33,775 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:33,775 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:33,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:33,976 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:33,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:33,977 INFO L82 PathProgramCache]: Analyzing trace with hash -716559787, now seen corresponding path program 55 times [2019-12-27 04:39:33,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:33,977 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720609715] [2019-12-27 04:39:33,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:33,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:34,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720609715] [2019-12-27 04:39:34,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723791712] [2019-12-27 04:39:34,047 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:34,089 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:34,089 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:34,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:34,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:34,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771835171] [2019-12-27 04:39:34,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:34,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:34,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:34,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:34,203 INFO L87 Difference]: Start difference. First operand 152 states and 359 transitions. Second operand 16 states. [2019-12-27 04:39:34,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:34,733 INFO L93 Difference]: Finished difference Result 225 states and 480 transitions. [2019-12-27 04:39:34,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:39:34,734 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:34,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:34,736 INFO L225 Difference]: With dead ends: 225 [2019-12-27 04:39:34,736 INFO L226 Difference]: Without dead ends: 223 [2019-12-27 04:39:34,737 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2019-12-27 04:39:34,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-12-27 04:39:34,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 145. [2019-12-27 04:39:34,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 04:39:34,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 330 transitions. [2019-12-27 04:39:34,743 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 330 transitions. Word has length 13 [2019-12-27 04:39:34,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:34,743 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 330 transitions. [2019-12-27 04:39:34,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:34,743 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 330 transitions. [2019-12-27 04:39:34,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:34,744 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:34,744 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:34,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:34,948 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:34,949 INFO L82 PathProgramCache]: Analyzing trace with hash -721177547, now seen corresponding path program 56 times [2019-12-27 04:39:34,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:34,950 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744852562] [2019-12-27 04:39:34,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:35,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744852562] [2019-12-27 04:39:35,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301714895] [2019-12-27 04:39:35,085 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:35,159 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:39:35,159 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:35,161 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:35,162 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:35,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:35,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:35,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:35,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117081426] [2019-12-27 04:39:35,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:35,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:35,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:35,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:35,336 INFO L87 Difference]: Start difference. First operand 145 states and 330 transitions. Second operand 16 states. [2019-12-27 04:39:35,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:35,750 INFO L93 Difference]: Finished difference Result 156 states and 335 transitions. [2019-12-27 04:39:35,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:39:35,750 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:35,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:35,752 INFO L225 Difference]: With dead ends: 156 [2019-12-27 04:39:35,752 INFO L226 Difference]: Without dead ends: 146 [2019-12-27 04:39:35,753 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2019-12-27 04:39:35,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-12-27 04:39:35,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 137. [2019-12-27 04:39:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 04:39:35,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 299 transitions. [2019-12-27 04:39:35,757 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 299 transitions. Word has length 13 [2019-12-27 04:39:35,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:35,758 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 299 transitions. [2019-12-27 04:39:35,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:35,758 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 299 transitions. [2019-12-27 04:39:35,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:35,759 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:35,759 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:35,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:35,964 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:35,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:35,964 INFO L82 PathProgramCache]: Analyzing trace with hash 801705142, now seen corresponding path program 57 times [2019-12-27 04:39:35,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:35,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501195728] [2019-12-27 04:39:35,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:36,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501195728] [2019-12-27 04:39:36,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644501663] [2019-12-27 04:39:36,054 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:36,103 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:39:36,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:36,105 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 04:39:36,105 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:36,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:36,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:36,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048385709] [2019-12-27 04:39:36,220 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:36,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:36,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:36,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:36,221 INFO L87 Difference]: Start difference. First operand 137 states and 299 transitions. Second operand 18 states. [2019-12-27 04:39:36,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:36,526 INFO L93 Difference]: Finished difference Result 178 states and 378 transitions. [2019-12-27 04:39:36,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 04:39:36,527 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:36,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:36,528 INFO L225 Difference]: With dead ends: 178 [2019-12-27 04:39:36,528 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 04:39:36,529 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2019-12-27 04:39:36,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 04:39:36,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 137. [2019-12-27 04:39:36,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-12-27 04:39:36,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 301 transitions. [2019-12-27 04:39:36,532 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 301 transitions. Word has length 14 [2019-12-27 04:39:36,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:36,532 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 301 transitions. [2019-12-27 04:39:36,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:36,533 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 301 transitions. [2019-12-27 04:39:36,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:36,533 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:36,533 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:36,736 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:36,738 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:36,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:36,739 INFO L82 PathProgramCache]: Analyzing trace with hash 802747827, now seen corresponding path program 58 times [2019-12-27 04:39:36,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:36,739 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737888929] [2019-12-27 04:39:36,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:36,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737888929] [2019-12-27 04:39:36,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662185286] [2019-12-27 04:39:36,853 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-12-27 04:39:36,895 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:36,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:36,896 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:36,897 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:37,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:37,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:37,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181716208] [2019-12-27 04:39:37,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:37,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:37,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:37,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:37,040 INFO L87 Difference]: Start difference. First operand 137 states and 301 transitions. Second operand 18 states. [2019-12-27 04:39:37,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:37,476 INFO L93 Difference]: Finished difference Result 178 states and 381 transitions. [2019-12-27 04:39:37,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:39:37,476 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:37,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:37,478 INFO L225 Difference]: With dead ends: 178 [2019-12-27 04:39:37,478 INFO L226 Difference]: Without dead ends: 177 [2019-12-27 04:39:37,478 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:39:37,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-12-27 04:39:37,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 140. [2019-12-27 04:39:37,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 04:39:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 312 transitions. [2019-12-27 04:39:37,481 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 312 transitions. Word has length 14 [2019-12-27 04:39:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:37,481 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 312 transitions. [2019-12-27 04:39:37,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:37,482 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 312 transitions. [2019-12-27 04:39:37,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:37,482 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:37,482 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:37,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:37,685 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:37,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:37,686 INFO L82 PathProgramCache]: Analyzing trace with hash 802747672, now seen corresponding path program 59 times [2019-12-27 04:39:37,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:37,686 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479365832] [2019-12-27 04:39:37,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:37,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479365832] [2019-12-27 04:39:37,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116433129] [2019-12-27 04:39:37,774 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:37,818 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:37,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:37,819 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:37,819 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:38,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:38,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:38,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947544346] [2019-12-27 04:39:38,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:38,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:38,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:38,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:38,083 INFO L87 Difference]: Start difference. First operand 140 states and 312 transitions. Second operand 18 states. [2019-12-27 04:39:38,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:38,603 INFO L93 Difference]: Finished difference Result 200 states and 425 transitions. [2019-12-27 04:39:38,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:38,604 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:38,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:38,606 INFO L225 Difference]: With dead ends: 200 [2019-12-27 04:39:38,606 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 04:39:38,606 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:39:38,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 04:39:38,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 140. [2019-12-27 04:39:38,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 04:39:38,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 311 transitions. [2019-12-27 04:39:38,610 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 311 transitions. Word has length 14 [2019-12-27 04:39:38,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:38,610 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 311 transitions. [2019-12-27 04:39:38,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:38,610 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 311 transitions. [2019-12-27 04:39:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:38,610 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:38,610 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:38,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:38,811 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:38,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:38,812 INFO L82 PathProgramCache]: Analyzing trace with hash 802743022, now seen corresponding path program 60 times [2019-12-27 04:39:38,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:38,813 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272425816] [2019-12-27 04:39:38,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:38,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272425816] [2019-12-27 04:39:38,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240180568] [2019-12-27 04:39:38,910 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:38,955 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:39:38,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:38,956 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:38,957 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:40,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:40,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:40,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376777828] [2019-12-27 04:39:40,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:40,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:40,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:40,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:40,118 INFO L87 Difference]: Start difference. First operand 140 states and 311 transitions. Second operand 18 states. [2019-12-27 04:39:40,840 WARN L192 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-27 04:39:41,101 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-27 04:39:41,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:41,260 INFO L93 Difference]: Finished difference Result 201 states and 427 transitions. [2019-12-27 04:39:41,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:41,260 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:41,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:41,262 INFO L225 Difference]: With dead ends: 201 [2019-12-27 04:39:41,262 INFO L226 Difference]: Without dead ends: 199 [2019-12-27 04:39:41,262 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=307, Invalid=685, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:39:41,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-12-27 04:39:41,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 140. [2019-12-27 04:39:41,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 04:39:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 311 transitions. [2019-12-27 04:39:41,266 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 311 transitions. Word has length 14 [2019-12-27 04:39:41,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:41,266 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 311 transitions. [2019-12-27 04:39:41,266 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:41,266 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 311 transitions. [2019-12-27 04:39:41,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:41,267 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:41,267 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:41,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:41,467 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:41,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:41,468 INFO L82 PathProgramCache]: Analyzing trace with hash 835071062, now seen corresponding path program 61 times [2019-12-27 04:39:41,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:41,469 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425259551] [2019-12-27 04:39:41,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:41,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425259551] [2019-12-27 04:39:41,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702066735] [2019-12-27 04:39:41,598 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:41,678 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:41,679 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:41,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:41,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:41,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058025521] [2019-12-27 04:39:41,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:41,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:41,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:41,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:41,905 INFO L87 Difference]: Start difference. First operand 140 states and 311 transitions. Second operand 18 states. [2019-12-27 04:39:42,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:42,409 INFO L93 Difference]: Finished difference Result 184 states and 394 transitions. [2019-12-27 04:39:42,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 04:39:42,409 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:42,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:42,411 INFO L225 Difference]: With dead ends: 184 [2019-12-27 04:39:42,411 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 04:39:42,411 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=348, Invalid=774, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:39:42,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 04:39:42,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 149. [2019-12-27 04:39:42,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 04:39:42,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 337 transitions. [2019-12-27 04:39:42,415 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 337 transitions. Word has length 14 [2019-12-27 04:39:42,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:42,415 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 337 transitions. [2019-12-27 04:39:42,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:42,415 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 337 transitions. [2019-12-27 04:39:42,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:42,416 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:42,416 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:42,616 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:42,617 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:42,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:42,617 INFO L82 PathProgramCache]: Analyzing trace with hash 835070907, now seen corresponding path program 62 times [2019-12-27 04:39:42,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:42,618 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738095337] [2019-12-27 04:39:42,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:42,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:42,706 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738095337] [2019-12-27 04:39:42,706 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064754237] [2019-12-27 04:39:42,706 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:42,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:39:42,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:42,748 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:42,749 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:44,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:44,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:44,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546586548] [2019-12-27 04:39:44,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:44,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:44,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:44,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:44,147 INFO L87 Difference]: Start difference. First operand 149 states and 337 transitions. Second operand 18 states. [2019-12-27 04:39:46,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:46,086 INFO L93 Difference]: Finished difference Result 226 states and 480 transitions. [2019-12-27 04:39:46,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:39:46,087 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:46,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:46,088 INFO L225 Difference]: With dead ends: 226 [2019-12-27 04:39:46,088 INFO L226 Difference]: Without dead ends: 224 [2019-12-27 04:39:46,089 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=353, Invalid=767, Unknown=2, NotChecked=0, Total=1122 [2019-12-27 04:39:46,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-12-27 04:39:46,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 149. [2019-12-27 04:39:46,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 04:39:46,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 337 transitions. [2019-12-27 04:39:46,092 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 337 transitions. Word has length 14 [2019-12-27 04:39:46,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:46,092 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 337 transitions. [2019-12-27 04:39:46,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:46,093 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 337 transitions. [2019-12-27 04:39:46,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:46,093 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:46,093 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:46,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:46,294 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:46,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:46,294 INFO L82 PathProgramCache]: Analyzing trace with hash 835066257, now seen corresponding path program 63 times [2019-12-27 04:39:46,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:46,295 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104227461] [2019-12-27 04:39:46,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:46,384 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104227461] [2019-12-27 04:39:46,384 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680706830] [2019-12-27 04:39:46,384 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:46,430 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:39:46,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:46,431 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:46,432 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:49,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:49,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:49,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545581910] [2019-12-27 04:39:49,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:49,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:49,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:49,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=229, Unknown=3, NotChecked=0, Total=306 [2019-12-27 04:39:49,601 INFO L87 Difference]: Start difference. First operand 149 states and 337 transitions. Second operand 18 states. [2019-12-27 04:39:50,422 WARN L192 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-27 04:39:51,489 WARN L192 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-12-27 04:39:52,010 WARN L192 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2019-12-27 04:39:52,750 WARN L192 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-27 04:39:52,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:52,805 INFO L93 Difference]: Finished difference Result 229 states and 487 transitions. [2019-12-27 04:39:52,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:39:52,805 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:52,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:52,807 INFO L225 Difference]: With dead ends: 229 [2019-12-27 04:39:52,808 INFO L226 Difference]: Without dead ends: 228 [2019-12-27 04:39:52,808 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=350, Invalid=768, Unknown=4, NotChecked=0, Total=1122 [2019-12-27 04:39:52,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2019-12-27 04:39:52,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 150. [2019-12-27 04:39:52,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 04:39:52,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 341 transitions. [2019-12-27 04:39:52,812 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 341 transitions. Word has length 14 [2019-12-27 04:39:52,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:52,812 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 341 transitions. [2019-12-27 04:39:52,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:52,812 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 341 transitions. [2019-12-27 04:39:52,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:52,813 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:52,813 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:53,013 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:53,014 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:53,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:53,014 INFO L82 PathProgramCache]: Analyzing trace with hash 835066102, now seen corresponding path program 64 times [2019-12-27 04:39:53,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:53,015 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683478251] [2019-12-27 04:39:53,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:53,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683478251] [2019-12-27 04:39:53,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536087446] [2019-12-27 04:39:53,102 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:53,147 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:53,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:53,148 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:53,149 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:54,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:54,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:54,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:54,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123651348] [2019-12-27 04:39:54,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:54,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:54,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:54,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:39:54,272 INFO L87 Difference]: Start difference. First operand 150 states and 341 transitions. Second operand 18 states. [2019-12-27 04:39:55,609 WARN L192 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-27 04:39:57,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:57,250 INFO L93 Difference]: Finished difference Result 220 states and 470 transitions. [2019-12-27 04:39:57,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:39:57,250 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:57,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:57,252 INFO L225 Difference]: With dead ends: 220 [2019-12-27 04:39:57,252 INFO L226 Difference]: Without dead ends: 216 [2019-12-27 04:39:57,253 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=378, Invalid=810, Unknown=2, NotChecked=0, Total=1190 [2019-12-27 04:39:57,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-12-27 04:39:57,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 149. [2019-12-27 04:39:57,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 04:39:57,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-27 04:39:57,258 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-27 04:39:57,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:57,258 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-27 04:39:57,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:57,258 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-27 04:39:57,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:57,259 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:57,259 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:57,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:57,462 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:57,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:57,463 INFO L82 PathProgramCache]: Analyzing trace with hash 834922107, now seen corresponding path program 65 times [2019-12-27 04:39:57,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:57,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916092656] [2019-12-27 04:39:57,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:57,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916092656] [2019-12-27 04:39:57,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754914562] [2019-12-27 04:39:57,609 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:57,671 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:57,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:57,673 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:57,674 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:01,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:01,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:01,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521843203] [2019-12-27 04:40:01,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:01,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:01,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:01,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=229, Unknown=4, NotChecked=0, Total=306 [2019-12-27 04:40:01,532 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-27 04:40:02,012 WARN L192 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2019-12-27 04:40:02,840 WARN L192 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-27 04:40:04,344 WARN L192 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2019-12-27 04:40:04,595 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2019-12-27 04:40:06,499 WARN L192 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-27 04:40:07,577 WARN L192 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-27 04:40:07,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:07,733 INFO L93 Difference]: Finished difference Result 223 states and 479 transitions. [2019-12-27 04:40:07,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:40:07,734 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:07,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:07,735 INFO L225 Difference]: With dead ends: 223 [2019-12-27 04:40:07,735 INFO L226 Difference]: Without dead ends: 222 [2019-12-27 04:40:07,736 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=282, Invalid=702, Unknown=8, NotChecked=0, Total=992 [2019-12-27 04:40:07,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-27 04:40:07,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 151. [2019-12-27 04:40:07,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-27 04:40:07,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 343 transitions. [2019-12-27 04:40:07,739 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 343 transitions. Word has length 14 [2019-12-27 04:40:07,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:07,739 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 343 transitions. [2019-12-27 04:40:07,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:07,739 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 343 transitions. [2019-12-27 04:40:07,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:07,740 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:07,740 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:07,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:07,942 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:07,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:07,943 INFO L82 PathProgramCache]: Analyzing trace with hash 834921952, now seen corresponding path program 66 times [2019-12-27 04:40:07,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:07,943 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041537373] [2019-12-27 04:40:07,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:08,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041537373] [2019-12-27 04:40:08,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586119920] [2019-12-27 04:40:08,044 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:08,086 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:40:08,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:08,087 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:08,088 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:10,017 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_237 Int)) (and (<= (div (+ (* v_~j~0_237 (- 1)) 1) (- 3)) 1) (<= c_~j~0 (+ c_~i~0 (* 2 v_~j~0_237) 1)) (<= c_~i~0 (+ (* 3 v_~j~0_237) 2)))) is different from true [2019-12-27 04:40:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:10,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:10,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:10,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749894025] [2019-12-27 04:40:10,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:10,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:10,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:10,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=202, Unknown=2, NotChecked=30, Total=306 [2019-12-27 04:40:10,019 INFO L87 Difference]: Start difference. First operand 151 states and 343 transitions. Second operand 18 states. [2019-12-27 04:40:10,389 WARN L192 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2019-12-27 04:40:12,207 WARN L192 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-27 04:40:13,551 WARN L192 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2019-12-27 04:40:14,414 WARN L192 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2019-12-27 04:40:15,253 WARN L192 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-27 04:40:15,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:15,268 INFO L93 Difference]: Finished difference Result 217 states and 469 transitions. [2019-12-27 04:40:15,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:40:15,268 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:15,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:15,270 INFO L225 Difference]: With dead ends: 217 [2019-12-27 04:40:15,270 INFO L226 Difference]: Without dead ends: 213 [2019-12-27 04:40:15,270 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=289, Invalid=640, Unknown=5, NotChecked=58, Total=992 [2019-12-27 04:40:15,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-12-27 04:40:15,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 150. [2019-12-27 04:40:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-27 04:40:15,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 339 transitions. [2019-12-27 04:40:15,274 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 339 transitions. Word has length 14 [2019-12-27 04:40:15,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:15,274 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 339 transitions. [2019-12-27 04:40:15,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:15,274 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 339 transitions. [2019-12-27 04:40:15,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:15,275 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:15,275 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:15,475 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:15,476 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:15,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:15,476 INFO L82 PathProgramCache]: Analyzing trace with hash 834917302, now seen corresponding path program 67 times [2019-12-27 04:40:15,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:15,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194755796] [2019-12-27 04:40:15,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:15,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194755796] [2019-12-27 04:40:15,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516692982] [2019-12-27 04:40:15,572 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:15,611 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:15,612 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:17,196 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_242 Int)) (and (<= (div (+ (* v_~j~0_242 (- 1)) 1) (- 3)) 1) (<= c_~i~0 (+ v_~j~0_242 1)) (<= c_~j~0 (+ (* 2 c_~i~0) v_~j~0_242)))) is different from true [2019-12-27 04:40:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2019-12-27 04:40:23,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:23,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:23,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900643988] [2019-12-27 04:40:23,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:23,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:23,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:23,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=204, Unknown=1, NotChecked=30, Total=306 [2019-12-27 04:40:23,413 INFO L87 Difference]: Start difference. First operand 150 states and 339 transitions. Second operand 18 states. [2019-12-27 04:40:25,553 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-27 04:40:30,945 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-27 04:40:31,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:31,636 INFO L93 Difference]: Finished difference Result 211 states and 454 transitions. [2019-12-27 04:40:31,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:40:31,636 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:31,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:31,638 INFO L225 Difference]: With dead ends: 211 [2019-12-27 04:40:31,638 INFO L226 Difference]: Without dead ends: 208 [2019-12-27 04:40:31,638 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=291, Invalid=698, Unknown=7, NotChecked=60, Total=1056 [2019-12-27 04:40:31,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-12-27 04:40:31,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 149. [2019-12-27 04:40:31,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 04:40:31,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 336 transitions. [2019-12-27 04:40:31,642 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 336 transitions. Word has length 14 [2019-12-27 04:40:31,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:31,642 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 336 transitions. [2019-12-27 04:40:31,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:31,642 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 336 transitions. [2019-12-27 04:40:31,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:31,643 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:31,643 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:31,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:31,844 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:31,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:31,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086542, now seen corresponding path program 68 times [2019-12-27 04:40:31,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:31,845 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271591362] [2019-12-27 04:40:31,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:31,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271591362] [2019-12-27 04:40:31,973 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813490222] [2019-12-27 04:40:31,973 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:32,025 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:40:32,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:32,026 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:32,027 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:32,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:32,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:32,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:32,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590705867] [2019-12-27 04:40:32,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:32,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:32,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:32,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:40:32,310 INFO L87 Difference]: Start difference. First operand 149 states and 336 transitions. Second operand 18 states. [2019-12-27 04:40:32,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:32,999 INFO L93 Difference]: Finished difference Result 245 states and 526 transitions. [2019-12-27 04:40:33,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:40:33,000 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:33,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:33,002 INFO L225 Difference]: With dead ends: 245 [2019-12-27 04:40:33,002 INFO L226 Difference]: Without dead ends: 241 [2019-12-27 04:40:33,002 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:40:33,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-12-27 04:40:33,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 155. [2019-12-27 04:40:33,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-27 04:40:33,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 354 transitions. [2019-12-27 04:40:33,008 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 354 transitions. Word has length 14 [2019-12-27 04:40:33,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:33,008 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 354 transitions. [2019-12-27 04:40:33,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:33,008 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 354 transitions. [2019-12-27 04:40:33,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:33,008 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:33,008 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:33,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:33,209 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:33,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:33,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086387, now seen corresponding path program 69 times [2019-12-27 04:40:33,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:33,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578928000] [2019-12-27 04:40:33,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:33,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578928000] [2019-12-27 04:40:33,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206093116] [2019-12-27 04:40:33,302 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:33,349 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 04:40:33,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:33,350 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:33,351 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:33,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:33,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:33,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009824622] [2019-12-27 04:40:33,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:33,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:33,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:33,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:40:33,527 INFO L87 Difference]: Start difference. First operand 155 states and 354 transitions. Second operand 18 states. [2019-12-27 04:40:34,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:34,222 INFO L93 Difference]: Finished difference Result 237 states and 509 transitions. [2019-12-27 04:40:34,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:40:34,223 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:34,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:34,225 INFO L225 Difference]: With dead ends: 237 [2019-12-27 04:40:34,225 INFO L226 Difference]: Without dead ends: 235 [2019-12-27 04:40:34,225 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=344, Invalid=778, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:40:34,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-27 04:40:34,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 153. [2019-12-27 04:40:34,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 04:40:34,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 347 transitions. [2019-12-27 04:40:34,229 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 347 transitions. Word has length 14 [2019-12-27 04:40:34,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:34,229 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 347 transitions. [2019-12-27 04:40:34,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:34,230 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 347 transitions. [2019-12-27 04:40:34,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:34,230 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:34,230 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:34,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:34,434 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:34,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:34,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942392, now seen corresponding path program 70 times [2019-12-27 04:40:34,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:34,435 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997488697] [2019-12-27 04:40:34,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:34,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:34,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997488697] [2019-12-27 04:40:34,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637682908] [2019-12-27 04:40:34,529 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:34,572 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:40:34,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:34,573 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:34,574 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:35,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:35,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:35,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834925287] [2019-12-27 04:40:35,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:35,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:35,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:35,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:40:35,311 INFO L87 Difference]: Start difference. First operand 153 states and 347 transitions. Second operand 18 states. [2019-12-27 04:40:35,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:35,918 INFO L93 Difference]: Finished difference Result 245 states and 527 transitions. [2019-12-27 04:40:35,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:40:35,919 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:35,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:35,920 INFO L225 Difference]: With dead ends: 245 [2019-12-27 04:40:35,920 INFO L226 Difference]: Without dead ends: 240 [2019-12-27 04:40:35,921 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=290, Invalid=701, Unknown=1, NotChecked=0, Total=992 [2019-12-27 04:40:35,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-12-27 04:40:35,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 157. [2019-12-27 04:40:35,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 04:40:35,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 361 transitions. [2019-12-27 04:40:35,925 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 361 transitions. Word has length 14 [2019-12-27 04:40:35,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:35,926 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 361 transitions. [2019-12-27 04:40:35,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:35,926 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 361 transitions. [2019-12-27 04:40:35,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:35,926 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:35,926 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:36,129 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:36,130 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:36,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:36,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942237, now seen corresponding path program 71 times [2019-12-27 04:40:36,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:36,131 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844290032] [2019-12-27 04:40:36,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:36,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844290032] [2019-12-27 04:40:36,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816447202] [2019-12-27 04:40:36,221 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:36,262 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 04:40:36,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:36,263 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:36,263 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:36,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:36,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:36,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:36,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189901992] [2019-12-27 04:40:36,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:36,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:36,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:36,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:40:36,495 INFO L87 Difference]: Start difference. First operand 157 states and 361 transitions. Second operand 18 states. [2019-12-27 04:40:37,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:37,141 INFO L93 Difference]: Finished difference Result 267 states and 576 transitions. [2019-12-27 04:40:37,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:40:37,141 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:37,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:37,143 INFO L225 Difference]: With dead ends: 267 [2019-12-27 04:40:37,143 INFO L226 Difference]: Without dead ends: 260 [2019-12-27 04:40:37,144 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:40:37,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-12-27 04:40:37,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 158. [2019-12-27 04:40:37,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 04:40:37,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 361 transitions. [2019-12-27 04:40:37,148 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 361 transitions. Word has length 14 [2019-12-27 04:40:37,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:37,148 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 361 transitions. [2019-12-27 04:40:37,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:37,148 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 361 transitions. [2019-12-27 04:40:37,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:37,149 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:37,149 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:37,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:37,350 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:37,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:37,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937587, now seen corresponding path program 72 times [2019-12-27 04:40:37,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:37,352 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563898272] [2019-12-27 04:40:37,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:37,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563898272] [2019-12-27 04:40:37,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487807905] [2019-12-27 04:40:37,448 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:37,492 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 04:40:37,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:37,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:37,493 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:45,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:45,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:45,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074250587] [2019-12-27 04:40:45,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:45,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:45,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:45,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:40:45,777 INFO L87 Difference]: Start difference. First operand 158 states and 361 transitions. Second operand 18 states. [2019-12-27 04:40:53,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:53,248 INFO L93 Difference]: Finished difference Result 269 states and 580 transitions. [2019-12-27 04:40:53,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 04:40:53,249 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:53,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:53,251 INFO L225 Difference]: With dead ends: 269 [2019-12-27 04:40:53,251 INFO L226 Difference]: Without dead ends: 266 [2019-12-27 04:40:53,251 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=334, Invalid=785, Unknown=3, NotChecked=0, Total=1122 [2019-12-27 04:40:53,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-12-27 04:40:53,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 161. [2019-12-27 04:40:53,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-27 04:40:53,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 374 transitions. [2019-12-27 04:40:53,256 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 374 transitions. Word has length 14 [2019-12-27 04:40:53,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:53,257 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 374 transitions. [2019-12-27 04:40:53,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:53,257 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 374 transitions. [2019-12-27 04:40:53,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:53,257 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:53,257 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:53,458 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:53,458 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:53,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:53,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473742, now seen corresponding path program 73 times [2019-12-27 04:40:53,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:53,459 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669752135] [2019-12-27 04:40:53,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:53,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669752135] [2019-12-27 04:40:53,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802192656] [2019-12-27 04:40:53,546 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:53,589 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:53,589 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:53,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:53,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:53,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100647241] [2019-12-27 04:40:53,805 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:53,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:53,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:53,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:40:53,806 INFO L87 Difference]: Start difference. First operand 161 states and 374 transitions. Second operand 18 states. [2019-12-27 04:40:54,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:54,841 INFO L93 Difference]: Finished difference Result 225 states and 497 transitions. [2019-12-27 04:40:54,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 04:40:54,842 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:54,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:54,844 INFO L225 Difference]: With dead ends: 225 [2019-12-27 04:40:54,844 INFO L226 Difference]: Without dead ends: 224 [2019-12-27 04:40:54,845 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=415, Invalid=1067, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 04:40:54,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-12-27 04:40:54,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 162. [2019-12-27 04:40:54,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-27 04:40:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 378 transitions. [2019-12-27 04:40:54,848 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 378 transitions. Word has length 14 [2019-12-27 04:40:54,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:54,848 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 378 transitions. [2019-12-27 04:40:54,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 378 transitions. [2019-12-27 04:40:54,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:54,849 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:54,849 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:55,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:55,051 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:55,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:55,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473587, now seen corresponding path program 74 times [2019-12-27 04:40:55,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:55,053 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485221136] [2019-12-27 04:40:55,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:55,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485221136] [2019-12-27 04:40:55,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219395366] [2019-12-27 04:40:55,157 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:55,198 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:40:55,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:55,199 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:55,200 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:40:55,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:55,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:55,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990006794] [2019-12-27 04:40:55,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:55,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:55,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:55,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:40:55,479 INFO L87 Difference]: Start difference. First operand 162 states and 378 transitions. Second operand 18 states. [2019-12-27 04:40:59,849 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 34 [2019-12-27 04:41:02,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:02,425 INFO L93 Difference]: Finished difference Result 248 states and 554 transitions. [2019-12-27 04:41:02,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:41:02,425 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:02,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:02,427 INFO L225 Difference]: With dead ends: 248 [2019-12-27 04:41:02,427 INFO L226 Difference]: Without dead ends: 247 [2019-12-27 04:41:02,428 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=271, Invalid=658, Unknown=1, NotChecked=0, Total=930 [2019-12-27 04:41:02,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-12-27 04:41:02,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 162. [2019-12-27 04:41:02,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-27 04:41:02,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 378 transitions. [2019-12-27 04:41:02,431 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 378 transitions. Word has length 14 [2019-12-27 04:41:02,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:02,431 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 378 transitions. [2019-12-27 04:41:02,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:02,431 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 378 transitions. [2019-12-27 04:41:02,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:02,432 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:02,432 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:02,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:02,632 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:02,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:02,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468937, now seen corresponding path program 75 times [2019-12-27 04:41:02,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:02,634 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337511003] [2019-12-27 04:41:02,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:02,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:02,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337511003] [2019-12-27 04:41:02,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748250259] [2019-12-27 04:41:02,732 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:02,774 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:41:02,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:02,775 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:02,776 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:03,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:03,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:03,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:03,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169198655] [2019-12-27 04:41:03,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:03,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:03,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:03,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:03,030 INFO L87 Difference]: Start difference. First operand 162 states and 378 transitions. Second operand 18 states. [2019-12-27 04:41:03,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:03,638 INFO L93 Difference]: Finished difference Result 249 states and 559 transitions. [2019-12-27 04:41:03,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:41:03,638 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:03,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:03,640 INFO L225 Difference]: With dead ends: 249 [2019-12-27 04:41:03,641 INFO L226 Difference]: Without dead ends: 248 [2019-12-27 04:41:03,641 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2019-12-27 04:41:03,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2019-12-27 04:41:03,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 162. [2019-12-27 04:41:03,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-27 04:41:03,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 378 transitions. [2019-12-27 04:41:03,645 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 378 transitions. Word has length 14 [2019-12-27 04:41:03,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:03,645 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 378 transitions. [2019-12-27 04:41:03,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:03,645 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 378 transitions. [2019-12-27 04:41:03,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:03,645 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:03,646 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:03,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:03,846 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:03,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:03,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468782, now seen corresponding path program 76 times [2019-12-27 04:41:03,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:03,847 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905950580] [2019-12-27 04:41:03,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:03,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905950580] [2019-12-27 04:41:03,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997195363] [2019-12-27 04:41:03,938 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:03,982 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:41:03,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:03,983 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:03,983 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:04,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:04,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:04,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100515730] [2019-12-27 04:41:04,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:04,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:04,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:04,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:04,311 INFO L87 Difference]: Start difference. First operand 162 states and 378 transitions. Second operand 18 states. [2019-12-27 04:41:05,890 WARN L192 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-27 04:41:05,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:05,962 INFO L93 Difference]: Finished difference Result 242 states and 528 transitions. [2019-12-27 04:41:05,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 04:41:05,962 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:05,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:05,964 INFO L225 Difference]: With dead ends: 242 [2019-12-27 04:41:05,964 INFO L226 Difference]: Without dead ends: 238 [2019-12-27 04:41:05,965 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=314, Invalid=742, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 04:41:05,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-12-27 04:41:05,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 161. [2019-12-27 04:41:05,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-27 04:41:05,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 374 transitions. [2019-12-27 04:41:05,968 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 374 transitions. Word has length 14 [2019-12-27 04:41:05,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:05,969 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 374 transitions. [2019-12-27 04:41:05,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:05,969 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 374 transitions. [2019-12-27 04:41:05,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:05,969 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:05,969 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:06,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:06,170 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:06,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:06,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324787, now seen corresponding path program 77 times [2019-12-27 04:41:06,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:06,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751780296] [2019-12-27 04:41:06,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:06,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751780296] [2019-12-27 04:41:06,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680102528] [2019-12-27 04:41:06,259 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:06,311 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:41:06,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:06,311 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:06,312 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:12,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:12,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:12,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082842369] [2019-12-27 04:41:12,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:12,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:12,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:12,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:12,673 INFO L87 Difference]: Start difference. First operand 161 states and 374 transitions. Second operand 18 states. [2019-12-27 04:41:12,962 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2019-12-27 04:41:15,953 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-27 04:41:19,259 WARN L192 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-27 04:41:21,449 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-27 04:41:24,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:24,245 INFO L93 Difference]: Finished difference Result 236 states and 519 transitions. [2019-12-27 04:41:24,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:41:24,246 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:24,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:24,248 INFO L225 Difference]: With dead ends: 236 [2019-12-27 04:41:24,248 INFO L226 Difference]: Without dead ends: 235 [2019-12-27 04:41:24,248 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=275, Invalid=717, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:41:24,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-27 04:41:24,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 158. [2019-12-27 04:41:24,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 04:41:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 365 transitions. [2019-12-27 04:41:24,252 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 365 transitions. Word has length 14 [2019-12-27 04:41:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:24,252 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 365 transitions. [2019-12-27 04:41:24,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:24,252 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 365 transitions. [2019-12-27 04:41:24,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:24,252 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:24,252 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:24,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:24,453 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:24,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:24,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018341, now seen corresponding path program 78 times [2019-12-27 04:41:24,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:24,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740215281] [2019-12-27 04:41:24,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:24,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:24,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740215281] [2019-12-27 04:41:24,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743040721] [2019-12-27 04:41:24,536 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:24,583 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 04:41:24,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:24,584 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:24,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:24,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:24,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:24,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22792193] [2019-12-27 04:41:24,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:24,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:24,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:24,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:24,744 INFO L87 Difference]: Start difference. First operand 158 states and 365 transitions. Second operand 18 states. [2019-12-27 04:41:25,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:25,350 INFO L93 Difference]: Finished difference Result 199 states and 441 transitions. [2019-12-27 04:41:25,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:41:25,350 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:25,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:25,352 INFO L225 Difference]: With dead ends: 199 [2019-12-27 04:41:25,352 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 04:41:25,352 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 04:41:25,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 04:41:25,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 159. [2019-12-27 04:41:25,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-27 04:41:25,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 367 transitions. [2019-12-27 04:41:25,356 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 367 transitions. Word has length 14 [2019-12-27 04:41:25,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:25,356 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 367 transitions. [2019-12-27 04:41:25,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:25,357 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 367 transitions. [2019-12-27 04:41:25,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:25,357 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:25,357 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:25,560 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:25,560 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:25,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:25,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1460172101, now seen corresponding path program 79 times [2019-12-27 04:41:25,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:25,562 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225293035] [2019-12-27 04:41:25,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:25,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225293035] [2019-12-27 04:41:25,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821901660] [2019-12-27 04:41:25,648 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:25,691 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:25,692 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:25,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:25,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:25,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770711634] [2019-12-27 04:41:25,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:25,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:25,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:25,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:25,824 INFO L87 Difference]: Start difference. First operand 159 states and 367 transitions. Second operand 18 states. [2019-12-27 04:41:26,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:26,374 INFO L93 Difference]: Finished difference Result 229 states and 495 transitions. [2019-12-27 04:41:26,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:41:26,374 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:26,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:26,376 INFO L225 Difference]: With dead ends: 229 [2019-12-27 04:41:26,376 INFO L226 Difference]: Without dead ends: 222 [2019-12-27 04:41:26,377 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 04:41:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-12-27 04:41:26,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 157. [2019-12-27 04:41:26,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 04:41:26,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 367 transitions. [2019-12-27 04:41:26,381 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 367 transitions. Word has length 14 [2019-12-27 04:41:26,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:26,382 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 367 transitions. [2019-12-27 04:41:26,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:26,382 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 367 transitions. [2019-12-27 04:41:26,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:26,383 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:26,383 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:26,586 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:26,586 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:26,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:26,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635791, now seen corresponding path program 80 times [2019-12-27 04:41:26,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:26,587 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278671859] [2019-12-27 04:41:26,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:26,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278671859] [2019-12-27 04:41:26,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007336919] [2019-12-27 04:41:26,675 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:26,717 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:41:26,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:26,718 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:26,718 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:28,466 WARN L192 SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-12-27 04:41:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:28,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:28,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:28,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474227508] [2019-12-27 04:41:28,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:28,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:28,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:28,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:28,469 INFO L87 Difference]: Start difference. First operand 157 states and 367 transitions. Second operand 18 states. [2019-12-27 04:41:29,007 WARN L192 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2019-12-27 04:41:30,231 WARN L192 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-27 04:41:31,106 WARN L192 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2019-12-27 04:41:31,678 WARN L192 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-12-27 04:41:32,116 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2019-12-27 04:41:33,075 WARN L192 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-27 04:41:33,369 WARN L192 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-27 04:41:33,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:33,390 INFO L93 Difference]: Finished difference Result 226 states and 494 transitions. [2019-12-27 04:41:33,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 04:41:33,391 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:33,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:33,392 INFO L225 Difference]: With dead ends: 226 [2019-12-27 04:41:33,393 INFO L226 Difference]: Without dead ends: 221 [2019-12-27 04:41:33,393 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=418, Invalid=1063, Unknown=1, NotChecked=0, Total=1482 [2019-12-27 04:41:33,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-27 04:41:33,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 159. [2019-12-27 04:41:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-27 04:41:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 372 transitions. [2019-12-27 04:41:33,397 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 372 transitions. Word has length 14 [2019-12-27 04:41:33,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:33,397 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 372 transitions. [2019-12-27 04:41:33,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:33,397 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 372 transitions. [2019-12-27 04:41:33,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:33,397 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:33,397 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:33,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:33,598 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:33,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:33,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635946, now seen corresponding path program 81 times [2019-12-27 04:41:33,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:33,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136497349] [2019-12-27 04:41:33,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:33,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136497349] [2019-12-27 04:41:33,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242774275] [2019-12-27 04:41:33,686 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:33,731 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 04:41:33,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:33,732 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:33,733 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:36,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:36,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:36,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72345182] [2019-12-27 04:41:36,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:36,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:36,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:36,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:36,978 INFO L87 Difference]: Start difference. First operand 159 states and 372 transitions. Second operand 18 states. [2019-12-27 04:41:39,512 WARN L192 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-27 04:41:40,379 WARN L192 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-12-27 04:41:43,303 WARN L192 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-27 04:41:43,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:43,697 INFO L93 Difference]: Finished difference Result 249 states and 544 transitions. [2019-12-27 04:41:43,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:41:43,697 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:43,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:43,699 INFO L225 Difference]: With dead ends: 249 [2019-12-27 04:41:43,699 INFO L226 Difference]: Without dead ends: 246 [2019-12-27 04:41:43,699 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=342, Invalid=847, Unknown=1, NotChecked=0, Total=1190 [2019-12-27 04:41:43,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-12-27 04:41:43,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 159. [2019-12-27 04:41:43,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-27 04:41:43,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 372 transitions. [2019-12-27 04:41:43,703 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 372 transitions. Word has length 14 [2019-12-27 04:41:43,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:43,703 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 372 transitions. [2019-12-27 04:41:43,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:43,703 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 372 transitions. [2019-12-27 04:41:43,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:43,704 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:43,704 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:43,904 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:43,904 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:43,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:43,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640596, now seen corresponding path program 82 times [2019-12-27 04:41:43,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:43,905 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214237054] [2019-12-27 04:41:43,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:43,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:44,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214237054] [2019-12-27 04:41:44,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571713196] [2019-12-27 04:41:44,021 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:44,063 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:41:44,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:44,064 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:44,064 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:44,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:44,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:44,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172254922] [2019-12-27 04:41:44,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:44,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:44,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:44,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:44,756 INFO L87 Difference]: Start difference. First operand 159 states and 372 transitions. Second operand 18 states. [2019-12-27 04:41:47,603 WARN L192 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-27 04:41:49,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:49,106 INFO L93 Difference]: Finished difference Result 280 states and 613 transitions. [2019-12-27 04:41:49,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:41:49,107 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:49,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:49,109 INFO L225 Difference]: With dead ends: 280 [2019-12-27 04:41:49,109 INFO L226 Difference]: Without dead ends: 276 [2019-12-27 04:41:49,109 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=293, Invalid=696, Unknown=3, NotChecked=0, Total=992 [2019-12-27 04:41:49,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2019-12-27 04:41:49,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 170. [2019-12-27 04:41:49,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-12-27 04:41:49,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 410 transitions. [2019-12-27 04:41:49,114 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 410 transitions. Word has length 14 [2019-12-27 04:41:49,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:49,114 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 410 transitions. [2019-12-27 04:41:49,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:49,114 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 410 transitions. [2019-12-27 04:41:49,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:49,114 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:49,114 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:49,315 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:49,315 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:49,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:49,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640751, now seen corresponding path program 83 times [2019-12-27 04:41:49,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:49,316 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123980729] [2019-12-27 04:41:49,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:49,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123980729] [2019-12-27 04:41:49,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899458077] [2019-12-27 04:41:49,407 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:49,448 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:41:49,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:49,449 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:49,450 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:51,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:51,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:51,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36313638] [2019-12-27 04:41:51,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:51,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:51,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:51,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:41:51,022 INFO L87 Difference]: Start difference. First operand 170 states and 410 transitions. Second operand 18 states. [2019-12-27 04:41:52,389 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2019-12-27 04:41:52,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:52,551 INFO L93 Difference]: Finished difference Result 280 states and 611 transitions. [2019-12-27 04:41:52,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:41:52,552 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:52,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:52,554 INFO L225 Difference]: With dead ends: 280 [2019-12-27 04:41:52,554 INFO L226 Difference]: Without dead ends: 275 [2019-12-27 04:41:52,554 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=319, Invalid=801, Unknown=2, NotChecked=0, Total=1122 [2019-12-27 04:41:52,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2019-12-27 04:41:52,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 168. [2019-12-27 04:41:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-12-27 04:41:52,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 404 transitions. [2019-12-27 04:41:52,558 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 404 transitions. Word has length 14 [2019-12-27 04:41:52,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:52,558 INFO L462 AbstractCegarLoop]: Abstraction has 168 states and 404 transitions. [2019-12-27 04:41:52,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:52,558 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 404 transitions. [2019-12-27 04:41:52,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:52,558 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:52,559 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:52,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:52,759 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:52,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:52,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784746, now seen corresponding path program 84 times [2019-12-27 04:41:52,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:52,760 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618445793] [2019-12-27 04:41:52,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:52,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618445793] [2019-12-27 04:41:52,866 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188873477] [2019-12-27 04:41:52,866 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:52,909 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:41:52,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:52,910 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:52,911 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:53,338 WARN L192 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 04:41:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:53,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:53,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:53,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524553737] [2019-12-27 04:41:53,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:53,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:53,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:53,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:53,388 INFO L87 Difference]: Start difference. First operand 168 states and 404 transitions. Second operand 18 states. [2019-12-27 04:41:54,348 WARN L192 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-27 04:41:55,259 WARN L192 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-27 04:41:55,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:55,375 INFO L93 Difference]: Finished difference Result 270 states and 594 transitions. [2019-12-27 04:41:55,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 04:41:55,375 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:55,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:55,378 INFO L225 Difference]: With dead ends: 270 [2019-12-27 04:41:55,378 INFO L226 Difference]: Without dead ends: 262 [2019-12-27 04:41:55,378 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=369, Invalid=891, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 04:41:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2019-12-27 04:41:55,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 171. [2019-12-27 04:41:55,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-12-27 04:41:55,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 412 transitions. [2019-12-27 04:41:55,382 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 412 transitions. Word has length 14 [2019-12-27 04:41:55,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:55,383 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 412 transitions. [2019-12-27 04:41:55,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:55,383 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 412 transitions. [2019-12-27 04:41:55,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:55,383 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:55,384 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:55,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:55,587 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:55,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:55,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784901, now seen corresponding path program 85 times [2019-12-27 04:41:55,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:55,588 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963491529] [2019-12-27 04:41:55,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:55,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963491529] [2019-12-27 04:41:55,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363742920] [2019-12-27 04:41:55,713 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:55,756 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:55,757 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:56,355 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_250 Int)) (and (<= c_~j~0 (+ c_~i~0 (* 2 v_~i~0_250) 2)) (<= (div (+ (* v_~i~0_250 (- 1)) 1) (- 2)) 2) (<= c_~i~0 (+ (* 3 v_~i~0_250) 2)))) is different from true [2019-12-27 04:41:56,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:56,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:56,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:56,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846754592] [2019-12-27 04:41:56,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:56,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:56,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:56,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=204, Unknown=1, NotChecked=30, Total=306 [2019-12-27 04:41:56,357 INFO L87 Difference]: Start difference. First operand 171 states and 412 transitions. Second operand 18 states. [2019-12-27 04:41:58,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:58,360 INFO L93 Difference]: Finished difference Result 270 states and 602 transitions. [2019-12-27 04:41:58,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 04:41:58,360 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:58,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:58,362 INFO L225 Difference]: With dead ends: 270 [2019-12-27 04:41:58,363 INFO L226 Difference]: Without dead ends: 267 [2019-12-27 04:41:58,363 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=385, Invalid=878, Unknown=1, NotChecked=68, Total=1332 [2019-12-27 04:41:58,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2019-12-27 04:41:58,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 169. [2019-12-27 04:41:58,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-12-27 04:41:58,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 406 transitions. [2019-12-27 04:41:58,367 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 406 transitions. Word has length 14 [2019-12-27 04:41:58,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:58,367 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 406 transitions. [2019-12-27 04:41:58,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:58,367 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 406 transitions. [2019-12-27 04:41:58,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:58,367 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:58,368 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:58,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:58,569 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:58,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:58,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1603163941, now seen corresponding path program 86 times [2019-12-27 04:41:58,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:58,570 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041970568] [2019-12-27 04:41:58,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:58,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041970568] [2019-12-27 04:41:58,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948135562] [2019-12-27 04:41:58,686 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:58,734 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:41:58,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:58,735 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:58,736 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:58,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:58,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:58,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729241084] [2019-12-27 04:41:58,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:58,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:58,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:58,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:58,862 INFO L87 Difference]: Start difference. First operand 169 states and 406 transitions. Second operand 18 states. [2019-12-27 04:41:59,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:59,506 INFO L93 Difference]: Finished difference Result 231 states and 505 transitions. [2019-12-27 04:41:59,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 04:41:59,507 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:59,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:59,508 INFO L225 Difference]: With dead ends: 231 [2019-12-27 04:41:59,508 INFO L226 Difference]: Without dead ends: 219 [2019-12-27 04:41:59,508 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=450, Invalid=1190, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 04:41:59,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-12-27 04:41:59,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 171. [2019-12-27 04:41:59,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-12-27 04:41:59,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 408 transitions. [2019-12-27 04:41:59,512 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 408 transitions. Word has length 14 [2019-12-27 04:41:59,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:59,513 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 408 transitions. [2019-12-27 04:41:59,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:59,513 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 408 transitions. [2019-12-27 04:41:59,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:59,513 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:59,513 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:59,716 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:59,716 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:59,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:59,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1603164096, now seen corresponding path program 87 times [2019-12-27 04:41:59,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:59,717 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521764908] [2019-12-27 04:41:59,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:59,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:59,808 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521764908] [2019-12-27 04:41:59,808 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969939697] [2019-12-27 04:41:59,808 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:59,850 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 04:41:59,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:59,850 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:59,851 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:41:59,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:59,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:59,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97170542] [2019-12-27 04:41:59,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:59,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:59,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:59,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:59,984 INFO L87 Difference]: Start difference. First operand 171 states and 408 transitions. Second operand 18 states. [2019-12-27 04:42:00,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:00,601 INFO L93 Difference]: Finished difference Result 269 states and 586 transitions. [2019-12-27 04:42:00,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 04:42:00,601 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:00,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:00,604 INFO L225 Difference]: With dead ends: 269 [2019-12-27 04:42:00,604 INFO L226 Difference]: Without dead ends: 266 [2019-12-27 04:42:00,604 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=960, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 04:42:00,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-12-27 04:42:00,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 171. [2019-12-27 04:42:00,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-12-27 04:42:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 408 transitions. [2019-12-27 04:42:00,608 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 408 transitions. Word has length 14 [2019-12-27 04:42:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:00,608 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 408 transitions. [2019-12-27 04:42:00,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:00,609 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 408 transitions. [2019-12-27 04:42:00,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:00,609 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:00,609 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:00,809 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:00,810 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:00,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:00,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168901, now seen corresponding path program 88 times [2019-12-27 04:42:00,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:00,811 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556831414] [2019-12-27 04:42:00,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:00,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:00,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556831414] [2019-12-27 04:42:00,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181665233] [2019-12-27 04:42:00,911 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:00,956 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:42:00,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:00,957 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:00,958 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:01,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:01,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:01,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:01,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985733920] [2019-12-27 04:42:01,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:01,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:01,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:01,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:01,111 INFO L87 Difference]: Start difference. First operand 171 states and 408 transitions. Second operand 18 states. [2019-12-27 04:42:01,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:01,738 INFO L93 Difference]: Finished difference Result 282 states and 615 transitions. [2019-12-27 04:42:01,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 04:42:01,739 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:01,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:01,741 INFO L225 Difference]: With dead ends: 282 [2019-12-27 04:42:01,742 INFO L226 Difference]: Without dead ends: 276 [2019-12-27 04:42:01,742 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 04:42:01,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2019-12-27 04:42:01,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 171. [2019-12-27 04:42:01,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-12-27 04:42:01,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 408 transitions. [2019-12-27 04:42:01,747 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 408 transitions. Word has length 14 [2019-12-27 04:42:01,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:01,747 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 408 transitions. [2019-12-27 04:42:01,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:01,747 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 408 transitions. [2019-12-27 04:42:01,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:01,748 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:01,748 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:01,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:01,951 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:01,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:01,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1603312896, now seen corresponding path program 89 times [2019-12-27 04:42:01,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:01,952 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177695130] [2019-12-27 04:42:01,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:02,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:02,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177695130] [2019-12-27 04:42:02,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291908742] [2019-12-27 04:42:02,049 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:02,090 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:42:02,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:02,091 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:02,092 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:02,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:02,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:02,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417314327] [2019-12-27 04:42:02,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:02,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:02,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:02,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:02,209 INFO L87 Difference]: Start difference. First operand 171 states and 408 transitions. Second operand 18 states. [2019-12-27 04:42:02,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:02,698 INFO L93 Difference]: Finished difference Result 275 states and 596 transitions. [2019-12-27 04:42:02,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 04:42:02,699 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:02,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:02,701 INFO L225 Difference]: With dead ends: 275 [2019-12-27 04:42:02,701 INFO L226 Difference]: Without dead ends: 270 [2019-12-27 04:42:02,702 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:42:02,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2019-12-27 04:42:02,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 173. [2019-12-27 04:42:02,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-12-27 04:42:02,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 414 transitions. [2019-12-27 04:42:02,707 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 414 transitions. Word has length 14 [2019-12-27 04:42:02,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:02,707 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 414 transitions. [2019-12-27 04:42:02,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:02,707 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 414 transitions. [2019-12-27 04:42:02,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:02,708 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:02,708 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:02,911 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:02,912 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:02,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:02,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1603313051, now seen corresponding path program 90 times [2019-12-27 04:42:02,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:02,913 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012969558] [2019-12-27 04:42:02,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:03,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012969558] [2019-12-27 04:42:03,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570285584] [2019-12-27 04:42:03,009 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:03,050 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 04:42:03,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:03,051 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:03,052 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:03,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:03,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:03,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:03,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578954427] [2019-12-27 04:42:03,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:03,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:03,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:03,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:03,168 INFO L87 Difference]: Start difference. First operand 173 states and 414 transitions. Second operand 18 states. [2019-12-27 04:42:03,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:03,543 INFO L93 Difference]: Finished difference Result 276 states and 607 transitions. [2019-12-27 04:42:03,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:42:03,543 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:03,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:03,545 INFO L225 Difference]: With dead ends: 276 [2019-12-27 04:42:03,545 INFO L226 Difference]: Without dead ends: 274 [2019-12-27 04:42:03,546 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2019-12-27 04:42:03,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2019-12-27 04:42:03,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 171. [2019-12-27 04:42:03,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-12-27 04:42:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 407 transitions. [2019-12-27 04:42:03,550 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 407 transitions. Word has length 14 [2019-12-27 04:42:03,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:03,551 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 407 transitions. [2019-12-27 04:42:03,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:03,551 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 407 transitions. [2019-12-27 04:42:03,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:03,551 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:03,551 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:03,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:03,752 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:03,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:03,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317701, now seen corresponding path program 91 times [2019-12-27 04:42:03,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:03,753 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949406687] [2019-12-27 04:42:03,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:03,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:03,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949406687] [2019-12-27 04:42:03,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741691178] [2019-12-27 04:42:03,844 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:03,886 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:03,887 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:04,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:04,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:04,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890350623] [2019-12-27 04:42:04,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:04,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:04,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:04,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:04,024 INFO L87 Difference]: Start difference. First operand 171 states and 407 transitions. Second operand 18 states. [2019-12-27 04:42:04,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:04,544 INFO L93 Difference]: Finished difference Result 278 states and 603 transitions. [2019-12-27 04:42:04,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:42:04,544 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:04,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:04,546 INFO L225 Difference]: With dead ends: 278 [2019-12-27 04:42:04,546 INFO L226 Difference]: Without dead ends: 275 [2019-12-27 04:42:04,547 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:42:04,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2019-12-27 04:42:04,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 170. [2019-12-27 04:42:04,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-12-27 04:42:04,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 408 transitions. [2019-12-27 04:42:04,550 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 408 transitions. Word has length 14 [2019-12-27 04:42:04,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:04,551 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 408 transitions. [2019-12-27 04:42:04,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:04,551 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 408 transitions. [2019-12-27 04:42:04,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:04,552 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:04,552 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:04,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:04,755 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:04,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:04,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781701, now seen corresponding path program 92 times [2019-12-27 04:42:04,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:04,756 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323279124] [2019-12-27 04:42:04,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:04,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323279124] [2019-12-27 04:42:04,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826185872] [2019-12-27 04:42:04,843 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:04,885 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:42:04,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:04,886 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:04,887 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:05,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:05,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:05,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757154396] [2019-12-27 04:42:05,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:05,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:05,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:05,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:05,771 INFO L87 Difference]: Start difference. First operand 170 states and 408 transitions. Second operand 18 states. [2019-12-27 04:42:07,235 WARN L192 SmtUtils]: Spent 998.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2019-12-27 04:42:07,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:07,945 INFO L93 Difference]: Finished difference Result 261 states and 574 transitions. [2019-12-27 04:42:07,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:42:07,946 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:07,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:07,948 INFO L225 Difference]: With dead ends: 261 [2019-12-27 04:42:07,948 INFO L226 Difference]: Without dead ends: 259 [2019-12-27 04:42:07,949 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=349, Invalid=840, Unknown=1, NotChecked=0, Total=1190 [2019-12-27 04:42:07,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2019-12-27 04:42:07,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 165. [2019-12-27 04:42:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-12-27 04:42:07,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 394 transitions. [2019-12-27 04:42:07,953 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 394 transitions. Word has length 14 [2019-12-27 04:42:07,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:07,954 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 394 transitions. [2019-12-27 04:42:07,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:07,954 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 394 transitions. [2019-12-27 04:42:07,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:07,954 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:07,955 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:08,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:08,158 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:08,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:08,159 INFO L82 PathProgramCache]: Analyzing trace with hash -591203565, now seen corresponding path program 93 times [2019-12-27 04:42:08,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:08,159 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197734845] [2019-12-27 04:42:08,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:08,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197734845] [2019-12-27 04:42:08,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512339116] [2019-12-27 04:42:08,261 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:08,305 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:42:08,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:08,306 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:08,306 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:08,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:08,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:08,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216703834] [2019-12-27 04:42:08,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:08,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:08,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:08,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:08,465 INFO L87 Difference]: Start difference. First operand 165 states and 394 transitions. Second operand 18 states. [2019-12-27 04:42:08,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:08,922 INFO L93 Difference]: Finished difference Result 196 states and 442 transitions. [2019-12-27 04:42:08,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:42:08,922 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:08,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:08,924 INFO L225 Difference]: With dead ends: 196 [2019-12-27 04:42:08,924 INFO L226 Difference]: Without dead ends: 194 [2019-12-27 04:42:08,924 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:42:08,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-12-27 04:42:08,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 165. [2019-12-27 04:42:08,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-12-27 04:42:08,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 394 transitions. [2019-12-27 04:42:08,928 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 394 transitions. Word has length 14 [2019-12-27 04:42:08,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:08,929 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 394 transitions. [2019-12-27 04:42:08,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:08,929 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 394 transitions. [2019-12-27 04:42:08,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:08,929 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:08,930 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:09,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:09,133 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:09,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:09,133 INFO L82 PathProgramCache]: Analyzing trace with hash -591347715, now seen corresponding path program 94 times [2019-12-27 04:42:09,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:09,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236886042] [2019-12-27 04:42:09,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:09,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236886042] [2019-12-27 04:42:09,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029010707] [2019-12-27 04:42:09,234 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:09,278 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:42:09,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:09,279 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:09,280 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:10,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:10,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:10,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562379470] [2019-12-27 04:42:10,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:10,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:10,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:10,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:42:10,499 INFO L87 Difference]: Start difference. First operand 165 states and 394 transitions. Second operand 18 states. [2019-12-27 04:42:11,022 WARN L192 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2019-12-27 04:42:12,065 WARN L192 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2019-12-27 04:42:12,498 WARN L192 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-27 04:42:12,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:12,758 INFO L93 Difference]: Finished difference Result 217 states and 482 transitions. [2019-12-27 04:42:12,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:42:12,759 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:12,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:12,760 INFO L225 Difference]: With dead ends: 217 [2019-12-27 04:42:12,760 INFO L226 Difference]: Without dead ends: 215 [2019-12-27 04:42:12,760 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=304, Invalid=687, Unknown=1, NotChecked=0, Total=992 [2019-12-27 04:42:12,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-12-27 04:42:12,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 162. [2019-12-27 04:42:12,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-27 04:42:12,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 388 transitions. [2019-12-27 04:42:12,765 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 388 transitions. Word has length 14 [2019-12-27 04:42:12,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:12,766 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 388 transitions. [2019-12-27 04:42:12,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:12,766 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 388 transitions. [2019-12-27 04:42:12,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:12,766 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:12,766 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:12,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:12,970 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:12,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:12,971 INFO L82 PathProgramCache]: Analyzing trace with hash -591352365, now seen corresponding path program 95 times [2019-12-27 04:42:12,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:12,971 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497461532] [2019-12-27 04:42:12,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:13,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497461532] [2019-12-27 04:42:13,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997914780] [2019-12-27 04:42:13,063 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:13,108 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:42:13,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:13,110 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:13,111 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:13,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:13,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:13,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865065331] [2019-12-27 04:42:13,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:13,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:13,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:13,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:13,276 INFO L87 Difference]: Start difference. First operand 162 states and 388 transitions. Second operand 18 states. [2019-12-27 04:42:14,232 WARN L192 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-27 04:42:14,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:14,392 INFO L93 Difference]: Finished difference Result 210 states and 466 transitions. [2019-12-27 04:42:14,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:42:14,392 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:14,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:14,393 INFO L225 Difference]: With dead ends: 210 [2019-12-27 04:42:14,393 INFO L226 Difference]: Without dead ends: 207 [2019-12-27 04:42:14,394 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:42:14,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-12-27 04:42:14,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 162. [2019-12-27 04:42:14,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-27 04:42:14,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 388 transitions. [2019-12-27 04:42:14,397 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 388 transitions. Word has length 14 [2019-12-27 04:42:14,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:14,397 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 388 transitions. [2019-12-27 04:42:14,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:14,398 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 388 transitions. [2019-12-27 04:42:14,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:14,398 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:14,398 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:14,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:14,599 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:14,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:14,599 INFO L82 PathProgramCache]: Analyzing trace with hash -595969970, now seen corresponding path program 96 times [2019-12-27 04:42:14,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:14,600 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672841322] [2019-12-27 04:42:14,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:14,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672841322] [2019-12-27 04:42:14,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309106041] [2019-12-27 04:42:14,702 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:14,743 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:42:14,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:14,744 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:14,745 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:16,026 WARN L192 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 04:42:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:16,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:16,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:16,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624209977] [2019-12-27 04:42:16,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:16,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:16,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:16,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=233, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:42:16,028 INFO L87 Difference]: Start difference. First operand 162 states and 388 transitions. Second operand 18 states. [2019-12-27 04:42:16,543 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 23 [2019-12-27 04:42:16,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:16,846 INFO L93 Difference]: Finished difference Result 231 states and 509 transitions. [2019-12-27 04:42:16,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:42:16,847 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:16,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:16,848 INFO L225 Difference]: With dead ends: 231 [2019-12-27 04:42:16,848 INFO L226 Difference]: Without dead ends: 229 [2019-12-27 04:42:16,848 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=353, Invalid=768, Unknown=1, NotChecked=0, Total=1122 [2019-12-27 04:42:16,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-27 04:42:16,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 160. [2019-12-27 04:42:16,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-12-27 04:42:16,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 381 transitions. [2019-12-27 04:42:16,853 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 381 transitions. Word has length 14 [2019-12-27 04:42:16,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:16,853 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 381 transitions. [2019-12-27 04:42:16,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:16,853 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 381 transitions. [2019-12-27 04:42:16,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:16,853 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:16,853 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:17,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:17,054 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:17,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:17,055 INFO L82 PathProgramCache]: Analyzing trace with hash -734498275, now seen corresponding path program 97 times [2019-12-27 04:42:17,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:17,055 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833161936] [2019-12-27 04:42:17,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:17,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833161936] [2019-12-27 04:42:17,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852282087] [2019-12-27 04:42:17,147 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:17,191 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:17,191 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:17,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:17,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:17,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126413682] [2019-12-27 04:42:17,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:17,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:17,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:17,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:17,436 INFO L87 Difference]: Start difference. First operand 160 states and 381 transitions. Second operand 18 states. [2019-12-27 04:42:18,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:18,465 INFO L93 Difference]: Finished difference Result 227 states and 495 transitions. [2019-12-27 04:42:18,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 04:42:18,465 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:18,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:18,466 INFO L225 Difference]: With dead ends: 227 [2019-12-27 04:42:18,466 INFO L226 Difference]: Without dead ends: 216 [2019-12-27 04:42:18,467 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=415, Invalid=1067, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 04:42:18,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-12-27 04:42:18,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 155. [2019-12-27 04:42:18,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-27 04:42:18,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 361 transitions. [2019-12-27 04:42:18,471 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 361 transitions. Word has length 14 [2019-12-27 04:42:18,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:18,471 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 361 transitions. [2019-12-27 04:42:18,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:18,471 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 361 transitions. [2019-12-27 04:42:18,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:18,471 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:18,471 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:18,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:18,672 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:18,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:18,673 INFO L82 PathProgramCache]: Analyzing trace with hash -733754519, now seen corresponding path program 98 times [2019-12-27 04:42:18,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:18,673 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206986016] [2019-12-27 04:42:18,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:18,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206986016] [2019-12-27 04:42:18,770 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748803243] [2019-12-27 04:42:18,770 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:18,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:42:18,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:18,815 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:18,815 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:19,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:19,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:19,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981228104] [2019-12-27 04:42:19,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:19,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:19,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:19,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=231, Unknown=2, NotChecked=0, Total=306 [2019-12-27 04:42:19,781 INFO L87 Difference]: Start difference. First operand 155 states and 361 transitions. Second operand 18 states. [2019-12-27 04:42:21,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:21,116 INFO L93 Difference]: Finished difference Result 229 states and 491 transitions. [2019-12-27 04:42:21,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 04:42:21,116 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:21,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:21,117 INFO L225 Difference]: With dead ends: 229 [2019-12-27 04:42:21,117 INFO L226 Difference]: Without dead ends: 226 [2019-12-27 04:42:21,118 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=378, Invalid=952, Unknown=2, NotChecked=0, Total=1332 [2019-12-27 04:42:21,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-27 04:42:21,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 152. [2019-12-27 04:42:21,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 04:42:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 351 transitions. [2019-12-27 04:42:21,122 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 351 transitions. Word has length 14 [2019-12-27 04:42:21,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:21,122 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 351 transitions. [2019-12-27 04:42:21,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:21,122 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 351 transitions. [2019-12-27 04:42:21,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:21,122 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:21,122 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:21,323 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:21,323 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:21,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:21,324 INFO L82 PathProgramCache]: Analyzing trace with hash -738367319, now seen corresponding path program 99 times [2019-12-27 04:42:21,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:21,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542510190] [2019-12-27 04:42:21,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:21,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542510190] [2019-12-27 04:42:21,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108362428] [2019-12-27 04:42:21,419 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:21,465 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:42:21,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:21,467 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:21,467 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:21,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:21,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:21,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881188045] [2019-12-27 04:42:21,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:21,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:21,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:21,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:21,600 INFO L87 Difference]: Start difference. First operand 152 states and 351 transitions. Second operand 18 states. [2019-12-27 04:42:22,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:22,110 INFO L93 Difference]: Finished difference Result 222 states and 471 transitions. [2019-12-27 04:42:22,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 04:42:22,110 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:22,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:22,111 INFO L225 Difference]: With dead ends: 222 [2019-12-27 04:42:22,112 INFO L226 Difference]: Without dead ends: 216 [2019-12-27 04:42:22,112 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=338, Invalid=852, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 04:42:22,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-12-27 04:42:22,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 148. [2019-12-27 04:42:22,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 04:42:22,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 336 transitions. [2019-12-27 04:42:22,115 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 336 transitions. Word has length 14 [2019-12-27 04:42:22,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:22,116 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 336 transitions. [2019-12-27 04:42:22,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:22,116 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 336 transitions. [2019-12-27 04:42:22,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:22,116 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:22,116 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:22,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:22,317 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:22,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:22,318 INFO L82 PathProgramCache]: Analyzing trace with hash -738367474, now seen corresponding path program 100 times [2019-12-27 04:42:22,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:22,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894840514] [2019-12-27 04:42:22,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:22,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894840514] [2019-12-27 04:42:22,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132420164] [2019-12-27 04:42:22,408 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:22,453 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:42:22,453 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:22,453 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:22,454 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:22,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:22,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:22,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635895670] [2019-12-27 04:42:22,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:22,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:22,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:22,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:22,572 INFO L87 Difference]: Start difference. First operand 148 states and 336 transitions. Second operand 18 states. [2019-12-27 04:42:23,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:23,131 INFO L93 Difference]: Finished difference Result 237 states and 503 transitions. [2019-12-27 04:42:23,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:42:23,132 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:23,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:23,135 INFO L225 Difference]: With dead ends: 237 [2019-12-27 04:42:23,135 INFO L226 Difference]: Without dead ends: 236 [2019-12-27 04:42:23,135 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:42:23,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-12-27 04:42:23,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 147. [2019-12-27 04:42:23,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 04:42:23,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 333 transitions. [2019-12-27 04:42:23,139 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 333 transitions. Word has length 14 [2019-12-27 04:42:23,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:23,139 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 333 transitions. [2019-12-27 04:42:23,139 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:23,139 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 333 transitions. [2019-12-27 04:42:23,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:23,140 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:23,140 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:23,343 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:23,343 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:23,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:23,344 INFO L82 PathProgramCache]: Analyzing trace with hash -738372124, now seen corresponding path program 101 times [2019-12-27 04:42:23,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:23,345 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854211096] [2019-12-27 04:42:23,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:23,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854211096] [2019-12-27 04:42:23,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576337371] [2019-12-27 04:42:23,437 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:23,480 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 04:42:23,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:23,481 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:23,481 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:23,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:23,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:23,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208829114] [2019-12-27 04:42:23,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:23,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:23,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:23,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:23,600 INFO L87 Difference]: Start difference. First operand 147 states and 333 transitions. Second operand 18 states. [2019-12-27 04:42:23,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:23,984 INFO L93 Difference]: Finished difference Result 245 states and 516 transitions. [2019-12-27 04:42:23,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:42:23,985 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:23,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:23,986 INFO L225 Difference]: With dead ends: 245 [2019-12-27 04:42:23,986 INFO L226 Difference]: Without dead ends: 243 [2019-12-27 04:42:23,986 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2019-12-27 04:42:23,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-27 04:42:23,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 147. [2019-12-27 04:42:23,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-12-27 04:42:23,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 333 transitions. [2019-12-27 04:42:23,989 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 333 transitions. Word has length 14 [2019-12-27 04:42:23,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:23,990 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 333 transitions. [2019-12-27 04:42:23,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:23,990 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 333 transitions. [2019-12-27 04:42:23,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:23,990 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:23,990 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:24,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:24,191 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:24,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:24,191 INFO L82 PathProgramCache]: Analyzing trace with hash -738372279, now seen corresponding path program 102 times [2019-12-27 04:42:24,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:24,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871940424] [2019-12-27 04:42:24,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:24,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871940424] [2019-12-27 04:42:24,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17156189] [2019-12-27 04:42:24,292 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:24,336 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:42:24,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:24,337 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:24,338 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:24,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:24,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:24,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698777991] [2019-12-27 04:42:24,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:24,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:24,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:24,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:24,458 INFO L87 Difference]: Start difference. First operand 147 states and 333 transitions. Second operand 18 states. [2019-12-27 04:42:24,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:24,950 INFO L93 Difference]: Finished difference Result 248 states and 521 transitions. [2019-12-27 04:42:24,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 04:42:24,950 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:24,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:24,951 INFO L225 Difference]: With dead ends: 248 [2019-12-27 04:42:24,951 INFO L226 Difference]: Without dead ends: 239 [2019-12-27 04:42:24,952 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:42:24,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-12-27 04:42:24,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 145. [2019-12-27 04:42:24,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-12-27 04:42:24,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 323 transitions. [2019-12-27 04:42:24,955 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 323 transitions. Word has length 14 [2019-12-27 04:42:24,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:24,955 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 323 transitions. [2019-12-27 04:42:24,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:24,956 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 323 transitions. [2019-12-27 04:42:24,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:24,956 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:24,956 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:25,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:25,158 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:25,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:25,159 INFO L82 PathProgramCache]: Analyzing trace with hash -738516274, now seen corresponding path program 103 times [2019-12-27 04:42:25,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:25,159 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552592126] [2019-12-27 04:42:25,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:25,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:25,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:25,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552592126] [2019-12-27 04:42:25,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306367641] [2019-12-27 04:42:25,269 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:25,319 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:25,320 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:25,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:25,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:25,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:25,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133232591] [2019-12-27 04:42:25,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:25,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:25,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:25,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:25,444 INFO L87 Difference]: Start difference. First operand 145 states and 323 transitions. Second operand 18 states. [2019-12-27 04:42:26,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:26,086 INFO L93 Difference]: Finished difference Result 231 states and 487 transitions. [2019-12-27 04:42:26,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 04:42:26,087 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:26,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:26,088 INFO L225 Difference]: With dead ends: 231 [2019-12-27 04:42:26,088 INFO L226 Difference]: Without dead ends: 229 [2019-12-27 04:42:26,089 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 04:42:26,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-12-27 04:42:26,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 144. [2019-12-27 04:42:26,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 04:42:26,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 319 transitions. [2019-12-27 04:42:26,092 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 319 transitions. Word has length 14 [2019-12-27 04:42:26,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:26,092 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 319 transitions. [2019-12-27 04:42:26,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:26,093 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 319 transitions. [2019-12-27 04:42:26,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:26,093 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:26,093 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:26,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:26,294 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:26,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:26,294 INFO L82 PathProgramCache]: Analyzing trace with hash -738516429, now seen corresponding path program 104 times [2019-12-27 04:42:26,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:26,295 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533850969] [2019-12-27 04:42:26,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:26,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533850969] [2019-12-27 04:42:26,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189538786] [2019-12-27 04:42:26,393 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:26,435 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:42:26,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:26,436 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:26,436 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:27,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:27,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:27,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168820817] [2019-12-27 04:42:27,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:27,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:27,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:27,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=229, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:42:27,501 INFO L87 Difference]: Start difference. First operand 144 states and 319 transitions. Second operand 18 states. [2019-12-27 04:42:30,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:30,214 INFO L93 Difference]: Finished difference Result 235 states and 487 transitions. [2019-12-27 04:42:30,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 04:42:30,215 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:30,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:30,215 INFO L225 Difference]: With dead ends: 235 [2019-12-27 04:42:30,216 INFO L226 Difference]: Without dead ends: 231 [2019-12-27 04:42:30,216 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=353, Invalid=833, Unknown=4, NotChecked=0, Total=1190 [2019-12-27 04:42:30,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-12-27 04:42:30,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 138. [2019-12-27 04:42:30,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-12-27 04:42:30,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 299 transitions. [2019-12-27 04:42:30,219 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 299 transitions. Word has length 14 [2019-12-27 04:42:30,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:30,220 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 299 transitions. [2019-12-27 04:42:30,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:30,220 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 299 transitions. [2019-12-27 04:42:30,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:30,220 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:30,220 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:30,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:30,421 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:30,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:30,421 INFO L82 PathProgramCache]: Analyzing trace with hash -876900274, now seen corresponding path program 105 times [2019-12-27 04:42:30,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:30,422 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066986447] [2019-12-27 04:42:30,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:30,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:30,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066986447] [2019-12-27 04:42:30,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035477639] [2019-12-27 04:42:30,513 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:30,562 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 04:42:30,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:30,563 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:30,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:31,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:31,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:31,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424572172] [2019-12-27 04:42:31,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:31,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:31,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:31,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=230, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:42:31,334 INFO L87 Difference]: Start difference. First operand 138 states and 299 transitions. Second operand 18 states. [2019-12-27 04:42:33,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:33,557 INFO L93 Difference]: Finished difference Result 228 states and 467 transitions. [2019-12-27 04:42:33,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 04:42:33,557 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:33,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:33,558 INFO L225 Difference]: With dead ends: 228 [2019-12-27 04:42:33,558 INFO L226 Difference]: Without dead ends: 227 [2019-12-27 04:42:33,559 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=410, Invalid=920, Unknown=2, NotChecked=0, Total=1332 [2019-12-27 04:42:33,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-27 04:42:33,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 134. [2019-12-27 04:42:33,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-12-27 04:42:33,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 283 transitions. [2019-12-27 04:42:33,562 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 283 transitions. Word has length 14 [2019-12-27 04:42:33,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:33,562 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 283 transitions. [2019-12-27 04:42:33,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:33,562 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 283 transitions. [2019-12-27 04:42:33,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:33,563 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:33,563 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:33,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:33,764 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:33,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:33,764 INFO L82 PathProgramCache]: Analyzing trace with hash -877049384, now seen corresponding path program 106 times [2019-12-27 04:42:33,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:33,765 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319002956] [2019-12-27 04:42:33,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:33,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319002956] [2019-12-27 04:42:33,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392650234] [2019-12-27 04:42:33,850 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:33,894 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:42:33,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:33,895 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:33,895 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:36,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:36,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:36,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312281365] [2019-12-27 04:42:36,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:36,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:36,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:36,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=231, Unknown=2, NotChecked=0, Total=306 [2019-12-27 04:42:36,824 INFO L87 Difference]: Start difference. First operand 134 states and 283 transitions. Second operand 18 states. [2019-12-27 04:42:39,081 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2019-12-27 04:42:40,834 WARN L192 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2019-12-27 04:42:41,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:41,067 INFO L93 Difference]: Finished difference Result 194 states and 391 transitions. [2019-12-27 04:42:41,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 04:42:41,068 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:41,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:41,069 INFO L225 Difference]: With dead ends: 194 [2019-12-27 04:42:41,069 INFO L226 Difference]: Without dead ends: 189 [2019-12-27 04:42:41,069 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=418, Invalid=1057, Unknown=7, NotChecked=0, Total=1482 [2019-12-27 04:42:41,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-27 04:42:41,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 131. [2019-12-27 04:42:41,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 04:42:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 272 transitions. [2019-12-27 04:42:41,072 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 272 transitions. Word has length 14 [2019-12-27 04:42:41,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:41,072 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 272 transitions. [2019-12-27 04:42:41,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:41,073 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 272 transitions. [2019-12-27 04:42:41,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:41,073 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:41,073 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:41,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:41,274 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:41,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:41,274 INFO L82 PathProgramCache]: Analyzing trace with hash -881666834, now seen corresponding path program 107 times [2019-12-27 04:42:41,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:41,275 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5954839] [2019-12-27 04:42:41,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:41,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5954839] [2019-12-27 04:42:41,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411376107] [2019-12-27 04:42:41,365 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:41,414 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 04:42:41,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:41,415 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:41,416 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:41,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:41,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:41,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757577114] [2019-12-27 04:42:41,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:41,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:41,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:41,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:41,555 INFO L87 Difference]: Start difference. First operand 131 states and 272 transitions. Second operand 18 states. [2019-12-27 04:42:42,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:42,154 INFO L93 Difference]: Finished difference Result 161 states and 323 transitions. [2019-12-27 04:42:42,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:42:42,155 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:42,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:42,155 INFO L225 Difference]: With dead ends: 161 [2019-12-27 04:42:42,156 INFO L226 Difference]: Without dead ends: 159 [2019-12-27 04:42:42,156 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 04:42:42,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-12-27 04:42:42,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 121. [2019-12-27 04:42:42,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-27 04:42:42,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 247 transitions. [2019-12-27 04:42:42,159 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 247 transitions. Word has length 14 [2019-12-27 04:42:42,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:42,160 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 247 transitions. [2019-12-27 04:42:42,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:42,160 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 247 transitions. [2019-12-27 04:42:42,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 04:42:42,160 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:42,160 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:42,360 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:42,361 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:42,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:42,361 INFO L82 PathProgramCache]: Analyzing trace with hash -916943731, now seen corresponding path program 108 times [2019-12-27 04:42:42,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:42,362 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281574283] [2019-12-27 04:42:42,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:42,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:42,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281574283] [2019-12-27 04:42:42,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187302924] [2019-12-27 04:42:42,480 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:42,531 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:42:42,532 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:42,533 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 04:42:42,533 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:42,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:42,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-27 04:42:42,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157365884] [2019-12-27 04:42:42,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 04:42:42,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:42,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 04:42:42,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-27 04:42:42,704 INFO L87 Difference]: Start difference. First operand 121 states and 247 transitions. Second operand 20 states. [2019-12-27 04:42:43,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:43,294 INFO L93 Difference]: Finished difference Result 164 states and 329 transitions. [2019-12-27 04:42:43,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:42:43,295 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2019-12-27 04:42:43,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:43,295 INFO L225 Difference]: With dead ends: 164 [2019-12-27 04:42:43,295 INFO L226 Difference]: Without dead ends: 162 [2019-12-27 04:42:43,296 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 04:42:43,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-12-27 04:42:43,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 122. [2019-12-27 04:42:43,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-12-27 04:42:43,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 251 transitions. [2019-12-27 04:42:43,299 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 251 transitions. Word has length 15 [2019-12-27 04:42:43,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:43,299 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 251 transitions. [2019-12-27 04:42:43,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 04:42:43,299 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 251 transitions. [2019-12-27 04:42:43,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 04:42:43,300 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:43,300 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:43,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:43,501 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:43,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:43,501 INFO L82 PathProgramCache]: Analyzing trace with hash -884620496, now seen corresponding path program 109 times [2019-12-27 04:42:43,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:43,502 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425520572] [2019-12-27 04:42:43,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:43,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425520572] [2019-12-27 04:42:43,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436793722] [2019-12-27 04:42:43,605 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:43,649 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 04:42:43,649 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:43,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:43,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:43,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-27 04:42:43,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673793222] [2019-12-27 04:42:43,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 04:42:43,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:43,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 04:42:43,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-27 04:42:43,813 INFO L87 Difference]: Start difference. First operand 122 states and 251 transitions. Second operand 20 states. [2019-12-27 04:42:44,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:44,372 INFO L93 Difference]: Finished difference Result 170 states and 341 transitions. [2019-12-27 04:42:44,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:42:44,372 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2019-12-27 04:42:44,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:44,373 INFO L225 Difference]: With dead ends: 170 [2019-12-27 04:42:44,373 INFO L226 Difference]: Without dead ends: 161 [2019-12-27 04:42:44,374 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=401, Invalid=931, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 04:42:44,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-12-27 04:42:44,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 131. [2019-12-27 04:42:44,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 04:42:44,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 275 transitions. [2019-12-27 04:42:44,377 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 275 transitions. Word has length 15 [2019-12-27 04:42:44,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:44,377 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 275 transitions. [2019-12-27 04:42:44,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 04:42:44,377 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 275 transitions. [2019-12-27 04:42:44,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 04:42:44,378 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:44,378 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:44,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:44,578 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:44,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:44,579 INFO L82 PathProgramCache]: Analyzing trace with hash -884620651, now seen corresponding path program 110 times [2019-12-27 04:42:44,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:44,579 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507959247] [2019-12-27 04:42:44,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:44,683 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:44,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507959247] [2019-12-27 04:42:44,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161448972] [2019-12-27 04:42:44,683 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:44,724 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:42:44,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:44,725 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 04:42:44,726 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:45,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:45,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-27 04:42:45,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023086969] [2019-12-27 04:42:45,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 04:42:45,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:45,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 04:42:45,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2019-12-27 04:42:45,198 INFO L87 Difference]: Start difference. First operand 131 states and 275 transitions. Second operand 20 states. [2019-12-27 04:42:45,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:45,953 INFO L93 Difference]: Finished difference Result 204 states and 409 transitions. [2019-12-27 04:42:45,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:42:45,954 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2019-12-27 04:42:45,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:45,955 INFO L225 Difference]: With dead ends: 204 [2019-12-27 04:42:45,955 INFO L226 Difference]: Without dead ends: 201 [2019-12-27 04:42:45,955 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=432, Invalid=974, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 04:42:45,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-12-27 04:42:45,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 131. [2019-12-27 04:42:45,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 04:42:45,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 274 transitions. [2019-12-27 04:42:45,958 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 274 transitions. Word has length 15 [2019-12-27 04:42:45,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:45,959 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 274 transitions. [2019-12-27 04:42:45,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 04:42:45,959 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 274 transitions. [2019-12-27 04:42:45,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 04:42:45,959 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:45,959 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:46,160 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:46,160 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:46,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:46,160 INFO L82 PathProgramCache]: Analyzing trace with hash -884625301, now seen corresponding path program 111 times [2019-12-27 04:42:46,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:46,161 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484026632] [2019-12-27 04:42:46,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:46,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484026632] [2019-12-27 04:42:46,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241009686] [2019-12-27 04:42:46,268 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:46,312 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:42:46,313 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:46,313 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 04:42:46,314 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:46,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:46,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-27 04:42:46,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333941929] [2019-12-27 04:42:46,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 04:42:46,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:46,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 04:42:46,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2019-12-27 04:42:46,763 INFO L87 Difference]: Start difference. First operand 131 states and 274 transitions. Second operand 20 states. [2019-12-27 04:42:48,517 WARN L192 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-12-27 04:42:48,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:48,748 INFO L93 Difference]: Finished difference Result 210 states and 421 transitions. [2019-12-27 04:42:48,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 04:42:48,749 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2019-12-27 04:42:48,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:48,749 INFO L225 Difference]: With dead ends: 210 [2019-12-27 04:42:48,750 INFO L226 Difference]: Without dead ends: 208 [2019-12-27 04:42:48,750 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=428, Invalid=978, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 04:42:48,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-12-27 04:42:48,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2019-12-27 04:42:48,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 04:42:48,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 274 transitions. [2019-12-27 04:42:48,753 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 274 transitions. Word has length 15 [2019-12-27 04:42:48,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:48,753 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 274 transitions. [2019-12-27 04:42:48,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 04:42:48,754 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 274 transitions. [2019-12-27 04:42:48,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 04:42:48,754 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:48,754 INFO L411 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:48,954 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:48,955 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:48,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:48,956 INFO L82 PathProgramCache]: Analyzing trace with hash -884769451, now seen corresponding path program 112 times [2019-12-27 04:42:48,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:48,956 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581948905] [2019-12-27 04:42:48,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:49,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581948905] [2019-12-27 04:42:49,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373472738] [2019-12-27 04:42:49,068 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:49,110 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:42:49,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:49,111 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 04:42:49,112 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:51,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:51,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-27 04:42:51,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269436210] [2019-12-27 04:42:51,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 04:42:51,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:51,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 04:42:51,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=292, Unknown=1, NotChecked=0, Total=380 [2019-12-27 04:42:51,073 INFO L87 Difference]: Start difference. First operand 131 states and 274 transitions. Second operand 20 states. [2019-12-27 04:42:52,209 WARN L192 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-27 04:42:53,167 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2019-12-27 04:42:54,969 WARN L192 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-27 04:42:55,829 WARN L192 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-27 04:42:55,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:55,961 INFO L93 Difference]: Finished difference Result 204 states and 412 transitions. [2019-12-27 04:42:55,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 04:42:55,962 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2019-12-27 04:42:55,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:55,963 INFO L225 Difference]: With dead ends: 204 [2019-12-27 04:42:55,963 INFO L226 Difference]: Without dead ends: 202 [2019-12-27 04:42:55,963 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=427, Invalid=978, Unknown=1, NotChecked=0, Total=1406 [2019-12-27 04:42:55,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-12-27 04:42:55,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 131. [2019-12-27 04:42:55,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-12-27 04:42:55,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 274 transitions. [2019-12-27 04:42:55,966 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 274 transitions. Word has length 15 [2019-12-27 04:42:55,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:55,966 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 274 transitions. [2019-12-27 04:42:55,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 04:42:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 274 transitions. [2019-12-27 04:42:55,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 04:42:55,967 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:55,967 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:56,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:56,168 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:56,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:56,168 INFO L82 PathProgramCache]: Analyzing trace with hash 117399634, now seen corresponding path program 113 times [2019-12-27 04:42:56,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:56,169 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174344386] [2019-12-27 04:42:56,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:56,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174344386] [2019-12-27 04:42:56,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879118337] [2019-12-27 04:42:56,281 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:56,327 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 04:42:56,327 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:56,328 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 04:42:56,329 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:57,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:57,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-27 04:42:57,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099082403] [2019-12-27 04:42:57,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 04:42:57,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:57,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 04:42:57,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=294, Unknown=1, NotChecked=0, Total=380 [2019-12-27 04:42:57,703 INFO L87 Difference]: Start difference. First operand 131 states and 274 transitions. Second operand 20 states. [2019-12-27 04:42:58,660 WARN L192 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-27 04:42:58,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:58,992 INFO L93 Difference]: Finished difference Result 208 states and 415 transitions. [2019-12-27 04:42:58,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 04:42:58,992 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2019-12-27 04:42:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:58,993 INFO L225 Difference]: With dead ends: 208 [2019-12-27 04:42:58,993 INFO L226 Difference]: Without dead ends: 205 [2019-12-27 04:42:58,994 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=489, Invalid=1150, Unknown=1, NotChecked=0, Total=1640 [2019-12-27 04:42:58,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-12-27 04:42:58,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 136. [2019-12-27 04:42:58,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-12-27 04:42:58,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 286 transitions. [2019-12-27 04:42:58,998 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 286 transitions. Word has length 15 [2019-12-27 04:42:58,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:58,998 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 286 transitions. [2019-12-27 04:42:58,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 04:42:58,998 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 286 transitions. [2019-12-27 04:42:58,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 04:42:58,999 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:58,999 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:59,199 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:59,199 INFO L410 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:59,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:59,200 INFO L82 PathProgramCache]: Analyzing trace with hash 117394984, now seen corresponding path program 114 times [2019-12-27 04:42:59,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:59,200 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148350049] [2019-12-27 04:42:59,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:59,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:42:59,315 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148350049] [2019-12-27 04:42:59,315 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258264300] [2019-12-27 04:42:59,316 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:59,359 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:42:59,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:59,360 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 04:42:59,361 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:43:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:43:01,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:43:01,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2019-12-27 04:43:01,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975103342] [2019-12-27 04:43:01,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 04:43:01,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:43:01,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 04:43:01,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=290, Unknown=2, NotChecked=0, Total=380 [2019-12-27 04:43:01,932 INFO L87 Difference]: Start difference. First operand 136 states and 286 transitions. Second operand 20 states. [2019-12-27 04:43:04,157 WARN L192 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-27 04:43:05,303 WARN L192 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 Received shutdown request... [2019-12-27 04:43:06,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 04:43:06,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:43:06,963 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-27 04:43:06,968 WARN L227 ceAbstractionStarter]: Timeout [2019-12-27 04:43:06,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 04:43:06 BasicIcfg [2019-12-27 04:43:06,969 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-27 04:43:06,970 INFO L168 Benchmark]: Toolchain (without parser) took 284491.73 ms. Allocated memory was 146.8 MB in the beginning and 181.4 MB in the end (delta: 34.6 MB). Free memory was 103.6 MB in the beginning and 108.4 MB in the end (delta: -4.8 MB). Peak memory consumption was 29.8 MB. Max. memory is 7.1 GB. [2019-12-27 04:43:06,970 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 146.8 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-12-27 04:43:06,971 INFO L168 Benchmark]: CACSL2BoogieTranslator took 728.48 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 103.2 MB in the beginning and 162.9 MB in the end (delta: -59.7 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. [2019-12-27 04:43:06,971 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.47 ms. Allocated memory is still 203.4 MB. Free memory was 162.9 MB in the beginning and 161.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2019-12-27 04:43:06,971 INFO L168 Benchmark]: Boogie Preprocessor took 26.67 ms. Allocated memory is still 203.4 MB. Free memory was 161.0 MB in the beginning and 159.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-12-27 04:43:06,971 INFO L168 Benchmark]: RCFGBuilder took 470.99 ms. Allocated memory is still 203.4 MB. Free memory was 159.7 MB in the beginning and 139.8 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2019-12-27 04:43:06,972 INFO L168 Benchmark]: TraceAbstraction took 283215.36 ms. Allocated memory was 203.4 MB in the beginning and 181.4 MB in the end (delta: -22.0 MB). Free memory was 139.2 MB in the beginning and 108.4 MB in the end (delta: 30.8 MB). Peak memory consumption was 8.7 MB. Max. memory is 7.1 GB. [2019-12-27 04:43:06,974 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 146.8 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 728.48 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 103.2 MB in the beginning and 162.9 MB in the end (delta: -59.7 MB). Peak memory consumption was 21.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.47 ms. Allocated memory is still 203.4 MB. Free memory was 162.9 MB in the beginning and 161.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.67 ms. Allocated memory is still 203.4 MB. Free memory was 161.0 MB in the beginning and 159.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 470.99 ms. Allocated memory is still 203.4 MB. Free memory was 159.7 MB in the beginning and 139.8 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 283215.36 ms. Allocated memory was 203.4 MB in the beginning and 181.4 MB in the end (delta: -22.0 MB). Free memory was 139.2 MB in the beginning and 108.4 MB in the end (delta: 30.8 MB). Peak memory consumption was 8.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 55 ProgramPointsBefore, 16 ProgramPointsAfterwards, 53 TransitionsBefore, 14 TransitionsAfterwards, 836 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 433 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 686 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (136states) and FLOYD_HOARE automaton (currently 24 states, 20 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 39 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 283.0s, OverallIterations: 127, TraceHistogramMax: 6, AutomataDifference: 157.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1383 SDtfs, 17823 SDslu, 11397 SDs, 0 SdLazy, 7157 SolverSat, 4562 SolverUnsat, 28 SolverUnknown, 0 SolverNotchecked, 42.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3839 GetRequests, 604 SyntacticMatches, 10 SemanticMatches, 3224 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 20573 ImplicationChecksByTransitivity, 200.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=176occurred in iteration=57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 126 MinimizatonAttempts, 6570 StatesRemovedByMinimization, 123 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 91.7s InterpolantComputationTime, 3199 NumberOfCodeBlocks, 3199 NumberOfCodeBlocksAsserted, 417 NumberOfCheckSat, 2950 ConstructedInterpolants, 123 QuantifiedInterpolants, 457734 SizeOfPredicates, 2 NumberOfNonLiveVariables, 11433 ConjunctsInSsa, 1352 ConjunctsInUnsatCore, 249 InterpolantComputations, 7 PerfectInterpolantSequences, 30/1890 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown