/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_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 04:38:21,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 04:38:21,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 04:38:21,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 04:38:21,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 04:38:21,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 04:38:21,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 04:38:21,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 04:38:21,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 04:38:21,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 04:38:21,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 04:38:21,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 04:38:21,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 04:38:21,179 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 04:38:21,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 04:38:21,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 04:38:21,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 04:38:21,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 04:38:21,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 04:38:21,192 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 04:38:21,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 04:38:21,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 04:38:21,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 04:38:21,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-12-27 04:38:21,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 04:38:21,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 04:38:21,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 04:38:21,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 04:38:21,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 04:38:21,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 04:38:21,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 04:38:21,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 04:38:21,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 04:38:21,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 04:38:21,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 04:38:21,216 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 04:38:21,230 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 04:38:21,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 04:38:21,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 04:38:21,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 04:38:21,232 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 04:38:21,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 04:38:21,232 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 04:38:21,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 04:38:21,233 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 04:38:21,233 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 04:38:21,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 04:38:21,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 04:38:21,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 04:38:21,234 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 04:38:21,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 04:38:21,234 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 04:38:21,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 04:38:21,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 04:38:21,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 04:38:21,235 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 04:38:21,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 04:38:21,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 04:38:21,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 04:38:21,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 04:38:21,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 04:38:21,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 04:38:21,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 04:38:21,236 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2019-12-27 04:38:21,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 04:38:21,237 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 04:38:21,511 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 04:38:21,531 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 04:38:21,534 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 04:38:21,536 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 04:38:21,536 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 04:38:21,537 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2019-12-27 04:38:21,613 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d63f860d8/8c5bb47963664d3ba76b508a00c89a79/FLAG8b3273b24 [2019-12-27 04:38:22,199 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 04:38:22,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2019-12-27 04:38:22,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d63f860d8/8c5bb47963664d3ba76b508a00c89a79/FLAG8b3273b24 [2019-12-27 04:38:22,499 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d63f860d8/8c5bb47963664d3ba76b508a00c89a79 [2019-12-27 04:38:22,509 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 04:38:22,511 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 04:38:22,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 04:38:22,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 04:38:22,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 04:38:22,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 04:38:22" (1/1) ... [2019-12-27 04:38:22,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a0c32b7 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 04:38:22,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 04:38:22" (1/1) ... [2019-12-27 04:38:22,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 04:38:22,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 04:38:23,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 04:38:23,041 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 04:38:23,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 04:38:23,197 INFO L208 MainTranslator]: Completed translation [2019-12-27 04:38:23,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 04:38:23 WrapperNode [2019-12-27 04:38:23,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 04:38:23,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 04:38:23,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 04:38:23,199 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 04:38:23,207 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 04:38:23,228 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 04:38:23,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 04:38:23,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 04:38:23,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 04:38:23,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 04:38:23,254 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 04:38:23,254 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 04:38:23,257 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 04:38:23,257 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 04:38:23,264 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 04:38:23,268 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 04:38:23,270 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 04:38:23,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 04:38:23,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 04:38:23,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 04:38:23,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 04:38:23,275 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 04:38:23,346 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-27 04:38:23,347 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-27 04:38:23,347 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-27 04:38:23,347 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-27 04:38:23,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 04:38:23,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-27 04:38:23,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 04:38:23,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 04:38:23,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-27 04:38:23,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 04:38:23,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 04:38:23,350 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 04:38:23,670 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 04:38:23,670 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-27 04:38:23,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 04:38:23 BoogieIcfgContainer [2019-12-27 04:38:23,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 04:38:23,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 04:38:23,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 04:38:23,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 04:38:23,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 04:38:22" (1/3) ... [2019-12-27 04:38:23,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e3e50 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 04:38:23,679 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 04:38:23,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e3e50 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 04:38:23,679 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 04:38:23,681 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2019-12-27 04:38:23,692 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 04:38:23,693 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 04:38:23,700 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 04:38:23,702 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 04:38:23,729 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,729 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,729 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,730 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,730 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,731 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,731 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,731 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,732 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,732 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,732 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,733 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,733 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,733 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,733 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,734 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,734 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,734 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,735 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,735 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,735 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,736 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,736 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,736 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,737 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,737 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,737 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,738 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,738 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,738 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,742 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,743 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,743 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,743 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,743 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,744 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,749 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,750 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,750 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,750 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,751 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,751 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 04:38:23,773 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 04:38:23,789 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 04:38:23,790 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 04:38:23,790 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 04:38:23,790 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-27 04:38:23,790 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 04:38:23,790 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 04:38:23,790 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 04:38:23,791 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 04:38:23,804 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions [2019-12-27 04:38:23,806 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 04:38:23,849 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 04:38:23,850 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 04:38:23,857 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 04:38:23,860 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions [2019-12-27 04:38:23,880 INFO L132 PetriNetUnfolder]: 5/51 cut-off events. [2019-12-27 04:38:23,880 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 04:38:23,882 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 04:38:23,885 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 836 [2019-12-27 04:38:23,886 INFO L182 etLargeBlockEncoding]: Variable Check. [2019-12-27 04:38:25,080 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-12-27 04:38:25,194 INFO L206 etLargeBlockEncoding]: Checked pairs total: 686 [2019-12-27 04:38:25,194 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2019-12-27 04:38:25,198 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-27 04:38:25,209 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-27 04:38:25,211 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-27 04:38:25,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-27 04:38:25,218 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:25,219 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-27 04:38:25,220 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:25,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:25,227 INFO L82 PathProgramCache]: Analyzing trace with hash 214338580, now seen corresponding path program 1 times [2019-12-27 04:38:25,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:25,238 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950938357] [2019-12-27 04:38:25,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:25,433 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 04:38:25,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950938357] [2019-12-27 04:38:25,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:25,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-27 04:38:25,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490310857] [2019-12-27 04:38:25,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 04:38:25,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:25,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 04:38:25,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 04:38:25,466 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-27 04:38:25,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:25,522 INFO L93 Difference]: Finished difference Result 54 states and 131 transitions. [2019-12-27 04:38:25,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 04:38:25,524 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-27 04:38:25,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:25,551 INFO L225 Difference]: With dead ends: 54 [2019-12-27 04:38:25,551 INFO L226 Difference]: Without dead ends: 36 [2019-12-27 04:38:25,556 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 04:38:25,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-27 04:38:25,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-27 04:38:25,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-27 04:38:25,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 78 transitions. [2019-12-27 04:38:25,589 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 78 transitions. Word has length 5 [2019-12-27 04:38:25,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:25,589 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 78 transitions. [2019-12-27 04:38:25,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 04:38:25,589 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 78 transitions. [2019-12-27 04:38:25,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 04:38:25,590 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:25,590 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:25,591 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:25,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:25,591 INFO L82 PathProgramCache]: Analyzing trace with hash -179042095, now seen corresponding path program 1 times [2019-12-27 04:38:25,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:25,592 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653816380] [2019-12-27 04:38:25,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:25,684 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 04:38:25,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653816380] [2019-12-27 04:38:25,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:25,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 04:38:25,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986919645] [2019-12-27 04:38:25,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 04:38:25,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:25,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 04:38:25,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-27 04:38:25,687 INFO L87 Difference]: Start difference. First operand 36 states and 78 transitions. Second operand 4 states. [2019-12-27 04:38:25,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:25,732 INFO L93 Difference]: Finished difference Result 42 states and 90 transitions. [2019-12-27 04:38:25,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 04:38:25,732 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 04:38:25,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:25,734 INFO L225 Difference]: With dead ends: 42 [2019-12-27 04:38:25,734 INFO L226 Difference]: Without dead ends: 41 [2019-12-27 04:38:25,735 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 04:38:25,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-27 04:38:25,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-12-27 04:38:25,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-27 04:38:25,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 86 transitions. [2019-12-27 04:38:25,743 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 86 transitions. Word has length 7 [2019-12-27 04:38:25,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:25,743 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 86 transitions. [2019-12-27 04:38:25,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 04:38:25,743 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 86 transitions. [2019-12-27 04:38:25,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 04:38:25,744 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:25,744 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:25,744 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:25,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:25,745 INFO L82 PathProgramCache]: Analyzing trace with hash -179038096, now seen corresponding path program 1 times [2019-12-27 04:38:25,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:25,745 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640218207] [2019-12-27 04:38:25,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:25,855 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 04:38:25,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640218207] [2019-12-27 04:38:25,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:25,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 04:38:25,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579787781] [2019-12-27 04:38:25,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 04:38:25,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:25,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 04:38:25,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-27 04:38:25,858 INFO L87 Difference]: Start difference. First operand 39 states and 86 transitions. Second operand 4 states. [2019-12-27 04:38:25,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:25,886 INFO L93 Difference]: Finished difference Result 51 states and 108 transitions. [2019-12-27 04:38:25,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 04:38:25,887 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 04:38:25,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:25,888 INFO L225 Difference]: With dead ends: 51 [2019-12-27 04:38:25,888 INFO L226 Difference]: Without dead ends: 50 [2019-12-27 04:38:25,889 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 04:38:25,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-27 04:38:25,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-12-27 04:38:25,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-27 04:38:25,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2019-12-27 04:38:25,897 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 7 [2019-12-27 04:38:25,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:25,897 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2019-12-27 04:38:25,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 04:38:25,897 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2019-12-27 04:38:25,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 04:38:25,898 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:25,898 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:25,899 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:25,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:25,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1255337161, now seen corresponding path program 2 times [2019-12-27 04:38:25,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:25,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416646786] [2019-12-27 04:38:25,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:25,964 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 04:38:25,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416646786] [2019-12-27 04:38:25,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234623836] [2019-12-27 04:38:25,965 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 04:38:26,027 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:26,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:26,030 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 04:38:26,034 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:26,084 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 04:38:26,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:26,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 04:38:26,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271729201] [2019-12-27 04:38:26,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 04:38:26,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:26,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 04:38:26,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-27 04:38:26,086 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand 8 states. [2019-12-27 04:38:26,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:26,154 INFO L93 Difference]: Finished difference Result 56 states and 118 transitions. [2019-12-27 04:38:26,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 04:38:26,155 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-27 04:38:26,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:26,156 INFO L225 Difference]: With dead ends: 56 [2019-12-27 04:38:26,157 INFO L226 Difference]: Without dead ends: 55 [2019-12-27 04:38:26,157 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 04:38:26,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-27 04:38:26,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-12-27 04:38:26,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-27 04:38:26,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 108 transitions. [2019-12-27 04:38:26,165 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 108 transitions. Word has length 8 [2019-12-27 04:38:26,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:26,165 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 108 transitions. [2019-12-27 04:38:26,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 04:38:26,166 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 108 transitions. [2019-12-27 04:38:26,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-27 04:38:26,166 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:26,167 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:26,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:26,370 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:26,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:26,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1255213037, now seen corresponding path program 2 times [2019-12-27 04:38:26,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:26,372 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142415791] [2019-12-27 04:38:26,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:26,471 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 04:38:26,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142415791] [2019-12-27 04:38:26,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649724680] [2019-12-27 04:38:26,472 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 04:38:26,525 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:26,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:26,526 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 04:38:26,528 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:26,588 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 04:38:26,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:26,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2019-12-27 04:38:26,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387542104] [2019-12-27 04:38:26,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 04:38:26,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:26,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 04:38:26,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-27 04:38:26,593 INFO L87 Difference]: Start difference. First operand 50 states and 108 transitions. Second operand 8 states. [2019-12-27 04:38:26,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:26,648 INFO L93 Difference]: Finished difference Result 63 states and 134 transitions. [2019-12-27 04:38:26,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 04:38:26,648 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2019-12-27 04:38:26,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:26,649 INFO L225 Difference]: With dead ends: 63 [2019-12-27 04:38:26,649 INFO L226 Difference]: Without dead ends: 62 [2019-12-27 04:38:26,650 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:26,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-27 04:38:26,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2019-12-27 04:38:26,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 04:38:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 122 transitions. [2019-12-27 04:38:26,658 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 122 transitions. Word has length 8 [2019-12-27 04:38:26,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:26,658 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 122 transitions. [2019-12-27 04:38:26,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 04:38:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 122 transitions. [2019-12-27 04:38:26,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 04:38:26,659 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:26,659 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:26,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:26,862 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:26,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:26,863 INFO L82 PathProgramCache]: Analyzing trace with hash -260745839, now seen corresponding path program 3 times [2019-12-27 04:38:26,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:26,864 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172841574] [2019-12-27 04:38:26,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:26,933 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 04:38:26,933 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172841574] [2019-12-27 04:38:26,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661908420] [2019-12-27 04:38:26,934 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 04:38:26,995 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:26,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:26,996 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:26,998 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:27,057 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 04:38:27,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:27,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:27,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336447825] [2019-12-27 04:38:27,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:27,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:27,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:27,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:27,060 INFO L87 Difference]: Start difference. First operand 55 states and 122 transitions. Second operand 10 states. [2019-12-27 04:38:27,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:27,155 INFO L93 Difference]: Finished difference Result 66 states and 142 transitions. [2019-12-27 04:38:27,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 04:38:27,155 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-27 04:38:27,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:27,156 INFO L225 Difference]: With dead ends: 66 [2019-12-27 04:38:27,156 INFO L226 Difference]: Without dead ends: 65 [2019-12-27 04:38:27,157 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 04:38:27,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-27 04:38:27,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2019-12-27 04:38:27,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-27 04:38:27,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2019-12-27 04:38:27,164 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 9 [2019-12-27 04:38:27,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:27,164 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2019-12-27 04:38:27,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:27,165 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2019-12-27 04:38:27,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 04:38:27,165 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:27,166 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:27,373 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:27,373 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:27,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:27,374 INFO L82 PathProgramCache]: Analyzing trace with hash -260744723, now seen corresponding path program 1 times [2019-12-27 04:38:27,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:27,374 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844169226] [2019-12-27 04:38:27,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:27,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:27,442 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 04:38:27,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844169226] [2019-12-27 04:38:27,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:27,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 04:38:27,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646019089] [2019-12-27 04:38:27,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 04:38:27,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:27,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 04:38:27,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-27 04:38:27,444 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand 5 states. [2019-12-27 04:38:27,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:27,493 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-27 04:38:27,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 04:38:27,494 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 04:38:27,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:27,495 INFO L225 Difference]: With dead ends: 68 [2019-12-27 04:38:27,495 INFO L226 Difference]: Without dead ends: 67 [2019-12-27 04:38:27,496 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 04:38:27,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-27 04:38:27,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-12-27 04:38:27,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-27 04:38:27,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 131 transitions. [2019-12-27 04:38:27,502 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 131 transitions. Word has length 9 [2019-12-27 04:38:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:27,503 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 131 transitions. [2019-12-27 04:38:27,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 04:38:27,503 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 131 transitions. [2019-12-27 04:38:27,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 04:38:27,504 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:27,504 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:27,504 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:27,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:27,505 INFO L82 PathProgramCache]: Analyzing trace with hash -260711243, now seen corresponding path program 2 times [2019-12-27 04:38:27,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:27,505 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564234002] [2019-12-27 04:38:27,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:27,550 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 04:38:27,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564234002] [2019-12-27 04:38:27,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 04:38:27,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 04:38:27,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159114800] [2019-12-27 04:38:27,552 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 04:38:27,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:27,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 04:38:27,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-27 04:38:27,553 INFO L87 Difference]: Start difference. First operand 59 states and 131 transitions. Second operand 5 states. [2019-12-27 04:38:27,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:27,599 INFO L93 Difference]: Finished difference Result 68 states and 144 transitions. [2019-12-27 04:38:27,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 04:38:27,600 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 04:38:27,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:27,602 INFO L225 Difference]: With dead ends: 68 [2019-12-27 04:38:27,602 INFO L226 Difference]: Without dead ends: 67 [2019-12-27 04:38:27,602 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 04:38:27,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-27 04:38:27,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2019-12-27 04:38:27,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-27 04:38:27,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 134 transitions. [2019-12-27 04:38:27,609 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 134 transitions. Word has length 9 [2019-12-27 04:38:27,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:27,610 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 134 transitions. [2019-12-27 04:38:27,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 04:38:27,610 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 134 transitions. [2019-12-27 04:38:27,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 04:38:27,611 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:27,611 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:27,611 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:27,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:27,611 INFO L82 PathProgramCache]: Analyzing trace with hash -256897840, now seen corresponding path program 3 times [2019-12-27 04:38:27,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:27,612 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708966939] [2019-12-27 04:38:27,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:27,675 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 04:38:27,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708966939] [2019-12-27 04:38:27,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23699282] [2019-12-27 04:38:27,676 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 04:38:27,724 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:27,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:27,725 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:27,726 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:27,794 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 04:38:27,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:27,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:27,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618892227] [2019-12-27 04:38:27,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:27,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:27,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:27,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:27,797 INFO L87 Difference]: Start difference. First operand 62 states and 134 transitions. Second operand 10 states. [2019-12-27 04:38:27,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:27,870 INFO L93 Difference]: Finished difference Result 77 states and 162 transitions. [2019-12-27 04:38:27,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 04:38:27,871 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-12-27 04:38:27,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:27,872 INFO L225 Difference]: With dead ends: 77 [2019-12-27 04:38:27,872 INFO L226 Difference]: Without dead ends: 76 [2019-12-27 04:38:27,872 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 04:38:27,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-27 04:38:27,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2019-12-27 04:38:27,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-12-27 04:38:27,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 148 transitions. [2019-12-27 04:38:27,879 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 148 transitions. Word has length 9 [2019-12-27 04:38:27,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:27,879 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 148 transitions. [2019-12-27 04:38:27,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:27,880 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 148 transitions. [2019-12-27 04:38:27,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:27,881 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:27,881 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:28,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:28,084 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:28,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:28,085 INFO L82 PathProgramCache]: Analyzing trace with hash 506814071, now seen corresponding path program 4 times [2019-12-27 04:38:28,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:28,086 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195777615] [2019-12-27 04:38:28,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:28,173 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 04:38:28,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195777615] [2019-12-27 04:38:28,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070065745] [2019-12-27 04:38:28,173 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 04:38:28,222 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:28,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:28,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:28,226 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:28,292 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 04:38:28,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:28,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:28,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013811630] [2019-12-27 04:38:28,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:28,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:28,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:28,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:28,295 INFO L87 Difference]: Start difference. First operand 67 states and 148 transitions. Second operand 12 states. [2019-12-27 04:38:28,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:28,399 INFO L93 Difference]: Finished difference Result 80 states and 170 transitions. [2019-12-27 04:38:28,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 04:38:28,399 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-27 04:38:28,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:28,400 INFO L225 Difference]: With dead ends: 80 [2019-12-27 04:38:28,400 INFO L226 Difference]: Without dead ends: 79 [2019-12-27 04:38:28,400 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 04:38:28,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-27 04:38:28,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2019-12-27 04:38:28,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 04:38:28,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-27 04:38:28,406 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-27 04:38:28,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:28,407 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-27 04:38:28,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:28,407 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-27 04:38:28,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:28,408 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:28,408 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:28,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:28,618 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:28,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:28,619 INFO L82 PathProgramCache]: Analyzing trace with hash 506815187, now seen corresponding path program 3 times [2019-12-27 04:38:28,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:28,620 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080608641] [2019-12-27 04:38:28,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:28,715 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 04:38:28,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080608641] [2019-12-27 04:38:28,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171438826] [2019-12-27 04:38:28,716 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 04:38:28,766 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:28,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:28,767 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:28,768 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:28,821 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 04:38:28,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:28,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:28,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103371326] [2019-12-27 04:38:28,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:28,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:28,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:28,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:28,824 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-27 04:38:28,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:28,897 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-27 04:38:28,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 04:38:28,898 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 04:38:28,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:28,899 INFO L225 Difference]: With dead ends: 88 [2019-12-27 04:38:28,899 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 04:38:28,900 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 04:38:28,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 04:38:28,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2019-12-27 04:38:28,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 04:38:28,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 156 transitions. [2019-12-27 04:38:28,905 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 156 transitions. Word has length 10 [2019-12-27 04:38:28,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:28,905 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 156 transitions. [2019-12-27 04:38:28,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:28,906 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 156 transitions. [2019-12-27 04:38:28,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:28,906 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:28,907 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:29,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:29,116 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:29,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:29,116 INFO L82 PathProgramCache]: Analyzing trace with hash 506848822, now seen corresponding path program 4 times [2019-12-27 04:38:29,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:29,117 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107890518] [2019-12-27 04:38:29,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:29,199 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 04:38:29,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107890518] [2019-12-27 04:38:29,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101834001] [2019-12-27 04:38:29,200 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 04:38:29,243 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:29,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:29,244 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:29,245 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:29,295 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 04:38:29,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:29,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:29,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944157649] [2019-12-27 04:38:29,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:29,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:29,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:29,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:29,297 INFO L87 Difference]: Start difference. First operand 70 states and 156 transitions. Second operand 10 states. [2019-12-27 04:38:29,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:29,390 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-27 04:38:29,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 04:38:29,390 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 04:38:29,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:29,391 INFO L225 Difference]: With dead ends: 88 [2019-12-27 04:38:29,392 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 04:38:29,392 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 04:38:29,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 04:38:29,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2019-12-27 04:38:29,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-12-27 04:38:29,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 157 transitions. [2019-12-27 04:38:29,397 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 157 transitions. Word has length 10 [2019-12-27 04:38:29,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:29,397 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 157 transitions. [2019-12-27 04:38:29,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:29,397 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 157 transitions. [2019-12-27 04:38:29,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:29,398 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:29,398 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:29,602 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:29,602 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:29,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:29,602 INFO L82 PathProgramCache]: Analyzing trace with hash 506848667, now seen corresponding path program 5 times [2019-12-27 04:38:29,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:29,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130438151] [2019-12-27 04:38:29,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:29,685 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 04:38:29,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130438151] [2019-12-27 04:38:29,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534178938] [2019-12-27 04:38:29,686 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 04:38:29,764 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:29,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:29,765 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:29,767 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:29,840 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 04:38:29,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:29,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:29,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189569313] [2019-12-27 04:38:29,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:29,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:29,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:29,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:29,843 INFO L87 Difference]: Start difference. First operand 71 states and 157 transitions. Second operand 10 states. [2019-12-27 04:38:29,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:29,960 INFO L93 Difference]: Finished difference Result 94 states and 194 transitions. [2019-12-27 04:38:29,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 04:38:29,961 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 04:38:29,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:29,962 INFO L225 Difference]: With dead ends: 94 [2019-12-27 04:38:29,962 INFO L226 Difference]: Without dead ends: 92 [2019-12-27 04:38:29,963 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 04:38:29,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-12-27 04:38:29,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2019-12-27 04:38:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-27 04:38:29,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-27 04:38:29,968 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-27 04:38:29,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:29,968 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-27 04:38:29,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:29,968 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-27 04:38:29,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:29,969 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:29,969 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:30,174 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:30,174 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:30,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:30,175 INFO L82 PathProgramCache]: Analyzing trace with hash 507886702, now seen corresponding path program 6 times [2019-12-27 04:38:30,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:30,175 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232588218] [2019-12-27 04:38:30,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:30,244 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 04:38:30,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232588218] [2019-12-27 04:38:30,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638245201] [2019-12-27 04:38:30,245 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 04:38:30,320 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 04:38:30,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:30,322 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:30,323 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:30,401 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 04:38:30,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:30,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2019-12-27 04:38:30,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093638449] [2019-12-27 04:38:30,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 04:38:30,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:30,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 04:38:30,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-12-27 04:38:30,405 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 10 states. [2019-12-27 04:38:30,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:30,573 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2019-12-27 04:38:30,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 04:38:30,574 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2019-12-27 04:38:30,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:30,575 INFO L225 Difference]: With dead ends: 88 [2019-12-27 04:38:30,575 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 04:38:30,575 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:30,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 04:38:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2019-12-27 04:38:30,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-27 04:38:30,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 160 transitions. [2019-12-27 04:38:30,579 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 160 transitions. Word has length 10 [2019-12-27 04:38:30,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:30,579 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 160 transitions. [2019-12-27 04:38:30,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 04:38:30,580 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 160 transitions. [2019-12-27 04:38:30,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 04:38:30,580 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:30,580 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:30,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:30,785 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:30,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:30,785 INFO L82 PathProgramCache]: Analyzing trace with hash 626102195, now seen corresponding path program 4 times [2019-12-27 04:38:30,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:30,786 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467620692] [2019-12-27 04:38:30,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:30,861 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 04:38:30,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467620692] [2019-12-27 04:38:30,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423506161] [2019-12-27 04:38:30,862 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 04:38:30,909 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:30,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:30,910 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:30,911 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:30,985 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 04:38:30,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:30,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:30,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86797849] [2019-12-27 04:38:30,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:30,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:30,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:30,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:30,987 INFO L87 Difference]: Start difference. First operand 74 states and 160 transitions. Second operand 12 states. [2019-12-27 04:38:31,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:31,092 INFO L93 Difference]: Finished difference Result 92 states and 194 transitions. [2019-12-27 04:38:31,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 04:38:31,092 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2019-12-27 04:38:31,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:31,094 INFO L225 Difference]: With dead ends: 92 [2019-12-27 04:38:31,094 INFO L226 Difference]: Without dead ends: 91 [2019-12-27 04:38:31,095 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 04:38:31,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-27 04:38:31,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2019-12-27 04:38:31,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 04:38:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 178 transitions. [2019-12-27 04:38:31,099 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 178 transitions. Word has length 10 [2019-12-27 04:38:31,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:31,099 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 178 transitions. [2019-12-27 04:38:31,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 178 transitions. [2019-12-27 04:38:31,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:31,100 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:31,100 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:31,303 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:31,304 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:31,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:31,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1468632495, now seen corresponding path program 5 times [2019-12-27 04:38:31,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:31,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435852630] [2019-12-27 04:38:31,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:31,379 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 04:38:31,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435852630] [2019-12-27 04:38:31,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820903295] [2019-12-27 04:38:31,380 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 04:38:31,427 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:38:31,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:31,428 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:31,429 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:31,517 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 04:38:31,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:31,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:31,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804653600] [2019-12-27 04:38:31,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:31,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:31,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:31,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:31,519 INFO L87 Difference]: Start difference. First operand 80 states and 178 transitions. Second operand 14 states. [2019-12-27 04:38:31,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:31,663 INFO L93 Difference]: Finished difference Result 95 states and 202 transitions. [2019-12-27 04:38:31,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 04:38:31,664 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-27 04:38:31,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:31,665 INFO L225 Difference]: With dead ends: 95 [2019-12-27 04:38:31,665 INFO L226 Difference]: Without dead ends: 94 [2019-12-27 04:38:31,665 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 04:38:31,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-27 04:38:31,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2019-12-27 04:38:31,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 04:38:31,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 04:38:31,670 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 04:38:31,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:31,670 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 04:38:31,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:31,670 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 04:38:31,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:31,671 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:31,671 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:31,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:31,880 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:31,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:31,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1468631379, now seen corresponding path program 7 times [2019-12-27 04:38:31,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:31,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29698665] [2019-12-27 04:38:31,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:31,937 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 04:38:31,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29698665] [2019-12-27 04:38:31,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371119198] [2019-12-27 04:38:31,938 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 04:38:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:31,981 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:31,983 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:32,055 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 04:38:32,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:32,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:32,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636365754] [2019-12-27 04:38:32,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:32,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:32,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:32,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:32,058 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-27 04:38:32,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:32,222 INFO L93 Difference]: Finished difference Result 104 states and 220 transitions. [2019-12-27 04:38:32,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 04:38:32,223 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:32,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:32,224 INFO L225 Difference]: With dead ends: 104 [2019-12-27 04:38:32,224 INFO L226 Difference]: Without dead ends: 103 [2019-12-27 04:38:32,224 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:38:32,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-27 04:38:32,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2019-12-27 04:38:32,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 04:38:32,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 186 transitions. [2019-12-27 04:38:32,229 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 186 transitions. Word has length 11 [2019-12-27 04:38:32,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:32,229 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 186 transitions. [2019-12-27 04:38:32,229 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:32,229 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 186 transitions. [2019-12-27 04:38:32,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:32,230 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:32,230 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:32,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:32,433 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:32,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:32,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597744, now seen corresponding path program 8 times [2019-12-27 04:38:32,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:32,434 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253403467] [2019-12-27 04:38:32,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:32,493 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 04:38:32,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253403467] [2019-12-27 04:38:32,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067534596] [2019-12-27 04:38:32,494 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 04:38:32,551 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:32,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:32,553 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:32,554 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:32,681 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 04:38:32,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:32,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:32,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030362450] [2019-12-27 04:38:32,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:32,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:32,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:32,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:32,684 INFO L87 Difference]: Start difference. First operand 83 states and 186 transitions. Second operand 12 states. [2019-12-27 04:38:32,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:32,863 INFO L93 Difference]: Finished difference Result 110 states and 230 transitions. [2019-12-27 04:38:32,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 04:38:32,864 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:32,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:32,866 INFO L225 Difference]: With dead ends: 110 [2019-12-27 04:38:32,866 INFO L226 Difference]: Without dead ends: 108 [2019-12-27 04:38:32,866 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:32,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-12-27 04:38:32,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 84. [2019-12-27 04:38:32,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 04:38:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-27 04:38:32,871 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-27 04:38:32,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:32,872 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-27 04:38:32,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:32,872 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-27 04:38:32,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:32,873 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:32,873 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:33,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:33,079 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:33,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:33,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1468597899, now seen corresponding path program 9 times [2019-12-27 04:38:33,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:33,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251437338] [2019-12-27 04:38:33,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:33,158 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 04:38:33,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251437338] [2019-12-27 04:38:33,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884254848] [2019-12-27 04:38:33,158 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 04:38:33,215 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:33,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:33,216 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:33,218 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:33,369 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 04:38:33,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:33,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:33,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371366470] [2019-12-27 04:38:33,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:33,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:33,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:33,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:33,371 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-27 04:38:33,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:33,577 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-27 04:38:33,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 04:38:33,577 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:33,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:33,578 INFO L225 Difference]: With dead ends: 107 [2019-12-27 04:38:33,579 INFO L226 Difference]: Without dead ends: 106 [2019-12-27 04:38:33,579 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2019-12-27 04:38:33,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-27 04:38:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2019-12-27 04:38:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 04:38:33,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 187 transitions. [2019-12-27 04:38:33,583 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 187 transitions. Word has length 11 [2019-12-27 04:38:33,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:33,583 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 187 transitions. [2019-12-27 04:38:33,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 187 transitions. [2019-12-27 04:38:33,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:33,584 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:33,584 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:33,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:33,791 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:33,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:33,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1467555214, now seen corresponding path program 10 times [2019-12-27 04:38:33,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:33,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202738731] [2019-12-27 04:38:33,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:33,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:33,866 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 04:38:33,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202738731] [2019-12-27 04:38:33,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082928872] [2019-12-27 04:38:33,867 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 04:38:33,918 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:33,918 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:33,919 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:33,921 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:34,006 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 04:38:34,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:34,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:34,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336763795] [2019-12-27 04:38:34,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:34,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:34,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:34,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:34,008 INFO L87 Difference]: Start difference. First operand 84 states and 187 transitions. Second operand 12 states. [2019-12-27 04:38:34,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:34,217 INFO L93 Difference]: Finished difference Result 117 states and 243 transitions. [2019-12-27 04:38:34,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:38:34,218 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:34,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:34,218 INFO L225 Difference]: With dead ends: 117 [2019-12-27 04:38:34,219 INFO L226 Difference]: Without dead ends: 115 [2019-12-27 04:38:34,219 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 04:38:34,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-27 04:38:34,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 83. [2019-12-27 04:38:34,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-12-27 04:38:34,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 183 transitions. [2019-12-27 04:38:34,222 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 183 transitions. Word has length 11 [2019-12-27 04:38:34,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:34,223 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 183 transitions. [2019-12-27 04:38:34,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:34,223 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 183 transitions. [2019-12-27 04:38:34,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:34,223 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:34,223 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:34,427 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:34,427 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:34,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:34,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1467559864, now seen corresponding path program 11 times [2019-12-27 04:38:34,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:34,428 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711736732] [2019-12-27 04:38:34,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:34,504 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 04:38:34,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711736732] [2019-12-27 04:38:34,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436795589] [2019-12-27 04:38:34,505 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 04:38:34,551 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:34,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:34,552 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:34,554 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:34,628 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 04:38:34,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:34,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:34,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189827142] [2019-12-27 04:38:34,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:34,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:34,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:34,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:34,630 INFO L87 Difference]: Start difference. First operand 83 states and 183 transitions. Second operand 12 states. [2019-12-27 04:38:34,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:34,780 INFO L93 Difference]: Finished difference Result 121 states and 250 transitions. [2019-12-27 04:38:34,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:38:34,787 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:34,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:34,788 INFO L225 Difference]: With dead ends: 121 [2019-12-27 04:38:34,788 INFO L226 Difference]: Without dead ends: 119 [2019-12-27 04:38:34,788 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 04:38:34,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-12-27 04:38:34,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2019-12-27 04:38:34,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-12-27 04:38:34,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 191 transitions. [2019-12-27 04:38:34,792 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 191 transitions. Word has length 11 [2019-12-27 04:38:34,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:34,792 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 191 transitions. [2019-12-27 04:38:34,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:34,792 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 191 transitions. [2019-12-27 04:38:34,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:34,793 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:34,793 INFO L411 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:34,996 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:34,997 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:34,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:34,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1467560019, now seen corresponding path program 12 times [2019-12-27 04:38:34,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:34,998 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526500199] [2019-12-27 04:38:34,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:35,061 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 04:38:35,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526500199] [2019-12-27 04:38:35,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860404151] [2019-12-27 04:38:35,062 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 04:38:35,112 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 04:38:35,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:35,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:35,114 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:35,202 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 04:38:35,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:35,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:35,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460604844] [2019-12-27 04:38:35,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:35,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:35,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:35,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:35,204 INFO L87 Difference]: Start difference. First operand 85 states and 191 transitions. Second operand 12 states. [2019-12-27 04:38:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:35,402 INFO L93 Difference]: Finished difference Result 117 states and 243 transitions. [2019-12-27 04:38:35,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:35,402 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:35,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:35,404 INFO L225 Difference]: With dead ends: 117 [2019-12-27 04:38:35,404 INFO L226 Difference]: Without dead ends: 115 [2019-12-27 04:38:35,404 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 04:38:35,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-27 04:38:35,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 88. [2019-12-27 04:38:35,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 04:38:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 194 transitions. [2019-12-27 04:38:35,408 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 194 transitions. Word has length 11 [2019-12-27 04:38:35,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:35,408 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 194 transitions. [2019-12-27 04:38:35,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:35,409 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 194 transitions. [2019-12-27 04:38:35,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:35,409 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:35,409 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:35,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:35,613 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:35,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:35,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1435380934, now seen corresponding path program 13 times [2019-12-27 04:38:35,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:35,614 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208115708] [2019-12-27 04:38:35,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:35,674 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 04:38:35,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208115708] [2019-12-27 04:38:35,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801742942] [2019-12-27 04:38:35,675 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 04:38:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:35,718 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 04:38:35,719 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:35,789 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 04:38:35,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:35,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2019-12-27 04:38:35,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705522080] [2019-12-27 04:38:35,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 04:38:35,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:35,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 04:38:35,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-12-27 04:38:35,791 INFO L87 Difference]: Start difference. First operand 88 states and 194 transitions. Second operand 12 states. [2019-12-27 04:38:35,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:35,973 INFO L93 Difference]: Finished difference Result 108 states and 224 transitions. [2019-12-27 04:38:35,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:38:35,976 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-12-27 04:38:35,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:35,977 INFO L225 Difference]: With dead ends: 108 [2019-12-27 04:38:35,977 INFO L226 Difference]: Without dead ends: 107 [2019-12-27 04:38:35,977 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 04:38:35,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-12-27 04:38:35,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2019-12-27 04:38:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-27 04:38:35,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2019-12-27 04:38:35,980 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 11 [2019-12-27 04:38:35,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:35,980 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2019-12-27 04:38:35,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 04:38:35,981 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2019-12-27 04:38:35,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 04:38:35,981 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:35,981 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:36,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:36,184 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:36,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:36,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2065667792, now seen corresponding path program 5 times [2019-12-27 04:38:36,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:36,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797838890] [2019-12-27 04:38:36,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:36,265 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 04:38:36,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797838890] [2019-12-27 04:38:36,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157908499] [2019-12-27 04:38:36,266 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 04:38:36,311 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:38:36,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:36,312 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:36,313 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:36,457 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 04:38:36,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:36,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:36,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657254320] [2019-12-27 04:38:36,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:36,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:36,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:36,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:36,460 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand 14 states. [2019-12-27 04:38:36,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:36,615 INFO L93 Difference]: Finished difference Result 107 states and 226 transitions. [2019-12-27 04:38:36,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 04:38:36,616 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2019-12-27 04:38:36,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:36,617 INFO L225 Difference]: With dead ends: 107 [2019-12-27 04:38:36,617 INFO L226 Difference]: Without dead ends: 106 [2019-12-27 04:38:36,617 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 04:38:36,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-12-27 04:38:36,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2019-12-27 04:38:36,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-12-27 04:38:36,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 208 transitions. [2019-12-27 04:38:36,622 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 208 transitions. Word has length 11 [2019-12-27 04:38:36,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:36,622 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 208 transitions. [2019-12-27 04:38:36,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:36,622 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 208 transitions. [2019-12-27 04:38:36,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:36,626 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:36,626 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:36,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:36,832 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:36,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:36,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1717033399, now seen corresponding path program 6 times [2019-12-27 04:38:36,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:36,833 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926191834] [2019-12-27 04:38:36,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:36,929 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 04:38:36,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926191834] [2019-12-27 04:38:36,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369555506] [2019-12-27 04:38:36,930 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 04:38:36,986 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 04:38:36,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:36,987 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:36,990 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:37,090 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 04:38:37,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:37,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:37,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028835589] [2019-12-27 04:38:37,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:37,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:37,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:37,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:37,092 INFO L87 Difference]: Start difference. First operand 93 states and 208 transitions. Second operand 16 states. [2019-12-27 04:38:37,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:37,255 INFO L93 Difference]: Finished difference Result 110 states and 234 transitions. [2019-12-27 04:38:37,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 04:38:37,262 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-27 04:38:37,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:37,263 INFO L225 Difference]: With dead ends: 110 [2019-12-27 04:38:37,263 INFO L226 Difference]: Without dead ends: 109 [2019-12-27 04:38:37,264 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:37,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-27 04:38:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2019-12-27 04:38:37,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 04:38:37,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 04:38:37,267 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 04:38:37,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:37,267 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 04:38:37,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:37,267 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 04:38:37,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:37,268 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:37,268 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:37,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:37,472 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:37,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:37,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1717034515, now seen corresponding path program 14 times [2019-12-27 04:38:37,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:37,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328795271] [2019-12-27 04:38:37,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:37,542 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 04:38:37,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328795271] [2019-12-27 04:38:37,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101582803] [2019-12-27 04:38:37,543 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 04:38:37,588 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:37,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:37,589 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:37,591 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:37,675 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 04:38:37,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:37,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:37,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494591425] [2019-12-27 04:38:37,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:37,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:37,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:37,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:37,678 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-27 04:38:37,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:37,935 INFO L93 Difference]: Finished difference Result 121 states and 257 transitions. [2019-12-27 04:38:37,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 04:38:37,936 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:37,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:37,937 INFO L225 Difference]: With dead ends: 121 [2019-12-27 04:38:37,937 INFO L226 Difference]: Without dead ends: 120 [2019-12-27 04:38:37,937 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:37,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-12-27 04:38:37,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2019-12-27 04:38:37,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 04:38:37,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 04:38:37,942 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 04:38:37,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:37,942 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 04:38:37,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:37,942 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 04:38:37,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:37,943 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:37,943 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:38,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:38,147 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:38,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:38,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1717068150, now seen corresponding path program 15 times [2019-12-27 04:38:38,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:38,148 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659310396] [2019-12-27 04:38:38,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:38,222 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 04:38:38,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659310396] [2019-12-27 04:38:38,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114880310] [2019-12-27 04:38:38,224 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 04:38:38,270 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:38:38,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:38,271 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:38,272 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:38,371 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 04:38:38,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:38,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:38,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551087177] [2019-12-27 04:38:38,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:38,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:38,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:38,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:38,372 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-27 04:38:38,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:38,673 INFO L93 Difference]: Finished difference Result 130 states and 275 transitions. [2019-12-27 04:38:38,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:38,673 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:38,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:38,674 INFO L225 Difference]: With dead ends: 130 [2019-12-27 04:38:38,674 INFO L226 Difference]: Without dead ends: 129 [2019-12-27 04:38:38,675 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2019-12-27 04:38:38,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-12-27 04:38:38,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 96. [2019-12-27 04:38:38,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 04:38:38,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 04:38:38,679 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 04:38:38,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:38,679 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 04:38:38,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:38,680 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 04:38:38,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:38,680 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:38,680 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:38,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:38,884 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:38,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:38,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1717067995, now seen corresponding path program 16 times [2019-12-27 04:38:38,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:38,885 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849883297] [2019-12-27 04:38:38,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:39,001 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 04:38:39,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849883297] [2019-12-27 04:38:39,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147881683] [2019-12-27 04:38:39,002 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 04:38:39,070 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:39,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:39,072 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:39,073 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:39,782 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 04:38:39,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:39,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:39,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057059053] [2019-12-27 04:38:39,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:39,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:39,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:39,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:39,784 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-27 04:38:40,351 WARN L192 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2019-12-27 04:38:40,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:40,700 INFO L93 Difference]: Finished difference Result 134 states and 282 transitions. [2019-12-27 04:38:40,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:40,701 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:40,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:40,702 INFO L225 Difference]: With dead ends: 134 [2019-12-27 04:38:40,702 INFO L226 Difference]: Without dead ends: 133 [2019-12-27 04:38:40,703 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:40,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-12-27 04:38:40,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 96. [2019-12-27 04:38:40,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 04:38:40,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 216 transitions. [2019-12-27 04:38:40,709 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 216 transitions. Word has length 12 [2019-12-27 04:38:40,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:40,709 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 216 transitions. [2019-12-27 04:38:40,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:40,709 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 216 transitions. [2019-12-27 04:38:40,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:40,710 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:40,710 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:40,915 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:40,915 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:40,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:40,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110835, now seen corresponding path program 17 times [2019-12-27 04:38:40,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:40,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651060569] [2019-12-27 04:38:40,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:40,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:41,003 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 04:38:41,004 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651060569] [2019-12-27 04:38:41,004 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993493238] [2019-12-27 04:38:41,004 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 04:38:41,049 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:41,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:41,050 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:41,053 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:41,169 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 04:38:41,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:41,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:41,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861264805] [2019-12-27 04:38:41,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:41,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:41,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:41,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:41,171 INFO L87 Difference]: Start difference. First operand 96 states and 216 transitions. Second operand 14 states. [2019-12-27 04:38:41,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:41,396 INFO L93 Difference]: Finished difference Result 131 states and 274 transitions. [2019-12-27 04:38:41,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 04:38:41,396 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:41,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:41,397 INFO L225 Difference]: With dead ends: 131 [2019-12-27 04:38:41,397 INFO L226 Difference]: Without dead ends: 129 [2019-12-27 04:38:41,398 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 04:38:41,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-12-27 04:38:41,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 97. [2019-12-27 04:38:41,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-12-27 04:38:41,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2019-12-27 04:38:41,401 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 12 [2019-12-27 04:38:41,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:41,402 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2019-12-27 04:38:41,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:41,402 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2019-12-27 04:38:41,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:41,402 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:41,402 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:41,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:41,606 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:41,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:41,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1718110680, now seen corresponding path program 18 times [2019-12-27 04:38:41,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:41,607 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651726611] [2019-12-27 04:38:41,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:41,681 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 04:38:41,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651726611] [2019-12-27 04:38:41,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506935131] [2019-12-27 04:38:41,682 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 04:38:41,726 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:38:41,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:41,728 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:41,728 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:41,841 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 04:38:41,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:41,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:41,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944824035] [2019-12-27 04:38:41,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:41,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:41,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:41,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:41,843 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand 14 states. [2019-12-27 04:38:42,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:42,160 INFO L93 Difference]: Finished difference Result 144 states and 305 transitions. [2019-12-27 04:38:42,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:42,160 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:42,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:42,161 INFO L225 Difference]: With dead ends: 144 [2019-12-27 04:38:42,162 INFO L226 Difference]: Without dead ends: 142 [2019-12-27 04:38:42,162 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2019-12-27 04:38:42,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-27 04:38:42,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 99. [2019-12-27 04:38:42,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 04:38:42,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-27 04:38:42,166 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-27 04:38:42,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:42,166 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-27 04:38:42,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:42,166 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-27 04:38:42,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:42,167 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:42,167 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:42,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:42,368 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:42,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:42,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1718106030, now seen corresponding path program 19 times [2019-12-27 04:38:42,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:42,368 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319109336] [2019-12-27 04:38:42,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:42,445 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 04:38:42,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319109336] [2019-12-27 04:38:42,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751554880] [2019-12-27 04:38:42,446 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 04:38:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:42,490 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:42,491 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:42,649 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 04:38:42,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:42,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:42,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758813356] [2019-12-27 04:38:42,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:42,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:42,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:42,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:42,650 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-27 04:38:42,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:42,933 INFO L93 Difference]: Finished difference Result 138 states and 292 transitions. [2019-12-27 04:38:42,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:42,934 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:42,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:42,935 INFO L225 Difference]: With dead ends: 138 [2019-12-27 04:38:42,935 INFO L226 Difference]: Without dead ends: 137 [2019-12-27 04:38:42,935 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2019-12-27 04:38:42,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-12-27 04:38:42,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 100. [2019-12-27 04:38:42,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-27 04:38:42,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 229 transitions. [2019-12-27 04:38:42,939 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 229 transitions. Word has length 12 [2019-12-27 04:38:42,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:42,939 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 229 transitions. [2019-12-27 04:38:42,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:42,940 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 229 transitions. [2019-12-27 04:38:42,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:42,940 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:42,940 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:43,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:43,144 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:43,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:43,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1718105875, now seen corresponding path program 20 times [2019-12-27 04:38:43,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:43,144 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799138693] [2019-12-27 04:38:43,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:43,210 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 04:38:43,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799138693] [2019-12-27 04:38:43,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344640113] [2019-12-27 04:38:43,211 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 04:38:43,258 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:43,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:43,260 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:43,261 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:43,406 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 04:38:43,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:43,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:43,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318649981] [2019-12-27 04:38:43,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:43,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:43,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:43,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:43,409 INFO L87 Difference]: Start difference. First operand 100 states and 229 transitions. Second operand 14 states. [2019-12-27 04:38:43,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:43,675 INFO L93 Difference]: Finished difference Result 133 states and 284 transitions. [2019-12-27 04:38:43,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:43,676 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:43,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:43,677 INFO L225 Difference]: With dead ends: 133 [2019-12-27 04:38:43,677 INFO L226 Difference]: Without dead ends: 132 [2019-12-27 04:38:43,677 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 04:38:43,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-12-27 04:38:43,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 99. [2019-12-27 04:38:43,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-12-27 04:38:43,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 225 transitions. [2019-12-27 04:38:43,681 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 225 transitions. Word has length 12 [2019-12-27 04:38:43,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:43,681 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 225 transitions. [2019-12-27 04:38:43,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:43,682 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 225 transitions. [2019-12-27 04:38:43,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:43,684 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:43,684 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:43,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:43,888 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:43,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:43,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429265, now seen corresponding path program 21 times [2019-12-27 04:38:43,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:43,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155269590] [2019-12-27 04:38:43,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:43,951 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 04:38:43,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155269590] [2019-12-27 04:38:43,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565251691] [2019-12-27 04:38:43,952 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 04:38:43,998 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:38:43,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:43,999 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 04:38:44,000 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:44,105 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 04:38:44,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:44,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:44,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198195724] [2019-12-27 04:38:44,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:44,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:44,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:44,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:44,108 INFO L87 Difference]: Start difference. First operand 99 states and 225 transitions. Second operand 14 states. [2019-12-27 04:38:44,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:44,462 INFO L93 Difference]: Finished difference Result 160 states and 328 transitions. [2019-12-27 04:38:44,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:38:44,463 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:44,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:44,464 INFO L225 Difference]: With dead ends: 160 [2019-12-27 04:38:44,464 INFO L226 Difference]: Without dead ends: 157 [2019-12-27 04:38:44,465 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 04:38:44,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-12-27 04:38:44,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 101. [2019-12-27 04:38:44,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-27 04:38:44,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 233 transitions. [2019-12-27 04:38:44,469 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 233 transitions. Word has length 12 [2019-12-27 04:38:44,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:44,470 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 233 transitions. [2019-12-27 04:38:44,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:44,470 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 233 transitions. [2019-12-27 04:38:44,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:44,470 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:44,471 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:44,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:44,674 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:44,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:44,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1750429110, now seen corresponding path program 22 times [2019-12-27 04:38:44,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:44,675 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699889714] [2019-12-27 04:38:44,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:44,739 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 04:38:44,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699889714] [2019-12-27 04:38:44,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867462499] [2019-12-27 04:38:44,739 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 04:38:44,794 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:44,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:44,795 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:44,796 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:44,915 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 04:38:44,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:44,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:44,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677476453] [2019-12-27 04:38:44,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:44,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:44,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:44,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:44,918 INFO L87 Difference]: Start difference. First operand 101 states and 233 transitions. Second operand 14 states. [2019-12-27 04:38:45,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:45,345 INFO L93 Difference]: Finished difference Result 149 states and 316 transitions. [2019-12-27 04:38:45,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:38:45,346 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:45,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:45,348 INFO L225 Difference]: With dead ends: 149 [2019-12-27 04:38:45,348 INFO L226 Difference]: Without dead ends: 147 [2019-12-27 04:38:45,349 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=419, Unknown=0, NotChecked=0, Total=600 [2019-12-27 04:38:45,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-12-27 04:38:45,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 100. [2019-12-27 04:38:45,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-27 04:38:45,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 229 transitions. [2019-12-27 04:38:45,356 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 229 transitions. Word has length 12 [2019-12-27 04:38:45,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:45,356 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 229 transitions. [2019-12-27 04:38:45,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:45,357 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 229 transitions. [2019-12-27 04:38:45,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:45,361 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:45,361 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:45,562 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:45,562 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:45,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:45,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1750285115, now seen corresponding path program 23 times [2019-12-27 04:38:45,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:45,563 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076141861] [2019-12-27 04:38:45,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:45,691 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 04:38:45,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076141861] [2019-12-27 04:38:45,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169787244] [2019-12-27 04:38:45,692 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 04:38:45,752 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:45,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:45,753 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:45,755 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:45,874 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 04:38:45,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:45,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:45,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8475008] [2019-12-27 04:38:45,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:45,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:45,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:45,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:45,877 INFO L87 Difference]: Start difference. First operand 100 states and 229 transitions. Second operand 14 states. [2019-12-27 04:38:46,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:46,124 INFO L93 Difference]: Finished difference Result 158 states and 331 transitions. [2019-12-27 04:38:46,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:38:46,124 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:46,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:46,125 INFO L225 Difference]: With dead ends: 158 [2019-12-27 04:38:46,126 INFO L226 Difference]: Without dead ends: 156 [2019-12-27 04:38:46,126 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 04:38:46,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-12-27 04:38:46,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 103. [2019-12-27 04:38:46,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-27 04:38:46,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 241 transitions. [2019-12-27 04:38:46,130 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 241 transitions. Word has length 12 [2019-12-27 04:38:46,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:46,130 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 241 transitions. [2019-12-27 04:38:46,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:46,131 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 241 transitions. [2019-12-27 04:38:46,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:46,131 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:46,131 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:46,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:46,335 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:46,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:46,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1750284960, now seen corresponding path program 24 times [2019-12-27 04:38:46,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:46,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702043117] [2019-12-27 04:38:46,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:46,405 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 04:38:46,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702043117] [2019-12-27 04:38:46,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432023016] [2019-12-27 04:38:46,406 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 04:38:46,449 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:38:46,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:46,449 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:46,450 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:46,534 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 04:38:46,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:46,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:46,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516022191] [2019-12-27 04:38:46,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:46,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:46,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:46,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:46,535 INFO L87 Difference]: Start difference. First operand 103 states and 241 transitions. Second operand 14 states. [2019-12-27 04:38:46,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:46,735 INFO L93 Difference]: Finished difference Result 154 states and 327 transitions. [2019-12-27 04:38:46,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 04:38:46,736 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:46,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:46,737 INFO L225 Difference]: With dead ends: 154 [2019-12-27 04:38:46,737 INFO L226 Difference]: Without dead ends: 152 [2019-12-27 04:38:46,737 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 04:38:46,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-12-27 04:38:46,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 102. [2019-12-27 04:38:46,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 04:38:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 237 transitions. [2019-12-27 04:38:46,742 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 237 transitions. Word has length 12 [2019-12-27 04:38:46,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:46,742 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 237 transitions. [2019-12-27 04:38:46,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:46,742 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 237 transitions. [2019-12-27 04:38:46,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:46,743 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:46,743 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:46,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:46,947 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:46,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:46,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1750280310, now seen corresponding path program 25 times [2019-12-27 04:38:46,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:46,948 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253735421] [2019-12-27 04:38:46,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:46,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:47,013 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 04:38:47,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253735421] [2019-12-27 04:38:47,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818623058] [2019-12-27 04:38:47,013 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 04:38:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:47,063 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:47,063 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:47,181 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 04:38:47,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:47,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:47,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751604246] [2019-12-27 04:38:47,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:47,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:47,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:47,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:47,183 INFO L87 Difference]: Start difference. First operand 102 states and 237 transitions. Second operand 14 states. [2019-12-27 04:38:47,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:47,483 INFO L93 Difference]: Finished difference Result 150 states and 317 transitions. [2019-12-27 04:38:47,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:38:47,483 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:47,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:47,484 INFO L225 Difference]: With dead ends: 150 [2019-12-27 04:38:47,485 INFO L226 Difference]: Without dead ends: 148 [2019-12-27 04:38:47,485 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 04:38:47,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-12-27 04:38:47,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 102. [2019-12-27 04:38:47,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 04:38:47,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 237 transitions. [2019-12-27 04:38:47,489 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 237 transitions. Word has length 12 [2019-12-27 04:38:47,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:47,502 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 237 transitions. [2019-12-27 04:38:47,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:47,502 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 237 transitions. [2019-12-27 04:38:47,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:47,503 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:47,503 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:47,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:47,703 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:47,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:47,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1547135351, now seen corresponding path program 26 times [2019-12-27 04:38:47,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:47,704 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769637881] [2019-12-27 04:38:47,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:47,786 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 04:38:47,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769637881] [2019-12-27 04:38:47,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300773855] [2019-12-27 04:38:47,786 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 04:38:47,827 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:47,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:47,828 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:47,829 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:47,933 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 04:38:47,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:47,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:47,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290791064] [2019-12-27 04:38:47,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:47,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:47,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:47,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:47,935 INFO L87 Difference]: Start difference. First operand 102 states and 237 transitions. Second operand 14 states. [2019-12-27 04:38:48,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:48,232 INFO L93 Difference]: Finished difference Result 142 states and 302 transitions. [2019-12-27 04:38:48,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 04:38:48,232 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:48,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:48,233 INFO L225 Difference]: With dead ends: 142 [2019-12-27 04:38:48,233 INFO L226 Difference]: Without dead ends: 141 [2019-12-27 04:38:48,234 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 04:38:48,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-12-27 04:38:48,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 101. [2019-12-27 04:38:48,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-27 04:38:48,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 233 transitions. [2019-12-27 04:38:48,240 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 233 transitions. Word has length 12 [2019-12-27 04:38:48,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:48,240 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 233 transitions. [2019-12-27 04:38:48,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:48,241 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 233 transitions. [2019-12-27 04:38:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:48,241 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:48,242 INFO L411 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:48,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:48,447 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:48,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:48,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1547284461, now seen corresponding path program 27 times [2019-12-27 04:38:48,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:48,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761397473] [2019-12-27 04:38:48,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:48,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:48,521 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 04:38:48,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761397473] [2019-12-27 04:38:48,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24378848] [2019-12-27 04:38:48,522 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 04:38:48,569 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:38:48,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:48,571 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 04:38:48,574 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:48,663 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 04:38:48,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:48,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2019-12-27 04:38:48,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416158494] [2019-12-27 04:38:48,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 04:38:48,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:48,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 04:38:48,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2019-12-27 04:38:48,665 INFO L87 Difference]: Start difference. First operand 101 states and 233 transitions. Second operand 14 states. [2019-12-27 04:38:48,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:48,877 INFO L93 Difference]: Finished difference Result 125 states and 264 transitions. [2019-12-27 04:38:48,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 04:38:48,877 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2019-12-27 04:38:48,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:48,878 INFO L225 Difference]: With dead ends: 125 [2019-12-27 04:38:48,878 INFO L226 Difference]: Without dead ends: 124 [2019-12-27 04:38:48,879 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 04:38:48,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-27 04:38:48,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 102. [2019-12-27 04:38:48,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 04:38:48,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 228 transitions. [2019-12-27 04:38:48,883 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 228 transitions. Word has length 12 [2019-12-27 04:38:48,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:48,884 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 228 transitions. [2019-12-27 04:38:48,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 04:38:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 228 transitions. [2019-12-27 04:38:48,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 04:38:48,884 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:48,884 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:49,087 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:49,088 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:49,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:49,088 INFO L82 PathProgramCache]: Analyzing trace with hash 388808531, now seen corresponding path program 6 times [2019-12-27 04:38:49,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:49,088 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203605881] [2019-12-27 04:38:49,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:49,150 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 04:38:49,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203605881] [2019-12-27 04:38:49,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044460012] [2019-12-27 04:38:49,151 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 04:38:49,194 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 04:38:49,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:49,195 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:49,196 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:49,295 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 04:38:49,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:49,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:49,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854654730] [2019-12-27 04:38:49,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:49,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:49,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:49,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:49,298 INFO L87 Difference]: Start difference. First operand 102 states and 228 transitions. Second operand 16 states. [2019-12-27 04:38:49,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:49,447 INFO L93 Difference]: Finished difference Result 123 states and 262 transitions. [2019-12-27 04:38:49,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 04:38:49,448 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-12-27 04:38:49,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:49,449 INFO L225 Difference]: With dead ends: 123 [2019-12-27 04:38:49,449 INFO L226 Difference]: Without dead ends: 122 [2019-12-27 04:38:49,449 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2019-12-27 04:38:49,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-12-27 04:38:49,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2019-12-27 04:38:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-12-27 04:38:49,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 238 transitions. [2019-12-27 04:38:49,453 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 238 transitions. Word has length 12 [2019-12-27 04:38:49,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:49,453 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 238 transitions. [2019-12-27 04:38:49,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:49,453 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 238 transitions. [2019-12-27 04:38:49,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:49,454 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:49,454 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:49,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:49,657 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:49,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:49,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1688428305, now seen corresponding path program 7 times [2019-12-27 04:38:49,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:49,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596486988] [2019-12-27 04:38:49,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:49,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596486988] [2019-12-27 04:38:49,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220635212] [2019-12-27 04:38:49,749 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 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 04:38:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:49,812 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:38:49,813 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:38:49,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 04:38:49,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 17 [2019-12-27 04:38:49,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295590530] [2019-12-27 04:38:49,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 04:38:49,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:49,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 04:38:49,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2019-12-27 04:38:49,965 INFO L87 Difference]: Start difference. First operand 106 states and 238 transitions. Second operand 9 states. [2019-12-27 04:38:49,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:49,999 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2019-12-27 04:38:49,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 04:38:50,000 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 04:38:50,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:50,001 INFO L225 Difference]: With dead ends: 150 [2019-12-27 04:38:50,001 INFO L226 Difference]: Without dead ends: 140 [2019-12-27 04:38:50,002 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2019-12-27 04:38:50,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-12-27 04:38:50,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2019-12-27 04:38:50,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-27 04:38:50,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 337 transitions. [2019-12-27 04:38:50,008 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 337 transitions. Word has length 13 [2019-12-27 04:38:50,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:50,009 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 337 transitions. [2019-12-27 04:38:50,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 04:38:50,009 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 337 transitions. [2019-12-27 04:38:50,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:50,010 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:50,010 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:50,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:50,214 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:50,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:50,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1688429421, now seen corresponding path program 28 times [2019-12-27 04:38:50,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:50,215 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202425426] [2019-12-27 04:38:50,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:50,298 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 04:38:50,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202425426] [2019-12-27 04:38:50,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019264785] [2019-12-27 04:38:50,299 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:50,344 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:38:50,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:50,345 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:50,346 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:50,455 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 04:38:50,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:50,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:50,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302420355] [2019-12-27 04:38:50,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:50,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:50,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:50,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:50,457 INFO L87 Difference]: Start difference. First operand 140 states and 337 transitions. Second operand 16 states. [2019-12-27 04:38:50,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:50,785 INFO L93 Difference]: Finished difference Result 172 states and 394 transitions. [2019-12-27 04:38:50,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:38:50,786 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:50,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:50,787 INFO L225 Difference]: With dead ends: 172 [2019-12-27 04:38:50,787 INFO L226 Difference]: Without dead ends: 171 [2019-12-27 04:38:50,788 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-12-27 04:38:50,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-12-27 04:38:50,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 142. [2019-12-27 04:38:50,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-12-27 04:38:50,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 342 transitions. [2019-12-27 04:38:50,793 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 342 transitions. Word has length 13 [2019-12-27 04:38:50,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:50,793 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 342 transitions. [2019-12-27 04:38:50,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:50,793 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 342 transitions. [2019-12-27 04:38:50,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:50,794 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:50,794 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:50,997 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:50,997 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:50,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:50,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1688463056, now seen corresponding path program 29 times [2019-12-27 04:38:50,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:50,998 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193040106] [2019-12-27 04:38:50,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:51,089 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 04:38:51,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193040106] [2019-12-27 04:38:51,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826205962] [2019-12-27 04:38:51,090 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:51,130 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:38:51,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:51,130 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:51,131 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:51,251 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 04:38:51,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:51,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:51,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299658709] [2019-12-27 04:38:51,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:51,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:51,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:51,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:51,253 INFO L87 Difference]: Start difference. First operand 142 states and 342 transitions. Second operand 16 states. [2019-12-27 04:38:51,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:51,592 INFO L93 Difference]: Finished difference Result 182 states and 416 transitions. [2019-12-27 04:38:51,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 04:38:51,592 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:51,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:51,594 INFO L225 Difference]: With dead ends: 182 [2019-12-27 04:38:51,594 INFO L226 Difference]: Without dead ends: 181 [2019-12-27 04:38:51,595 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 04:38:51,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-12-27 04:38:51,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 143. [2019-12-27 04:38:51,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-12-27 04:38:51,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 346 transitions. [2019-12-27 04:38:51,600 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 346 transitions. Word has length 13 [2019-12-27 04:38:51,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:51,600 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 346 transitions. [2019-12-27 04:38:51,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:51,600 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 346 transitions. [2019-12-27 04:38:51,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:51,601 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:51,601 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:51,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:51,804 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:51,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:51,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1688462901, now seen corresponding path program 30 times [2019-12-27 04:38:51,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:51,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301443394] [2019-12-27 04:38:51,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:51,899 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 04:38:51,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301443394] [2019-12-27 04:38:51,900 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73434158] [2019-12-27 04:38:51,900 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:51,965 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:38:51,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:51,966 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:51,967 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:52,568 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 04:38:52,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:52,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:52,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049174549] [2019-12-27 04:38:52,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:52,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:52,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:52,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:52,570 INFO L87 Difference]: Start difference. First operand 143 states and 346 transitions. Second operand 16 states. [2019-12-27 04:38:53,416 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2019-12-27 04:38:53,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:53,541 INFO L93 Difference]: Finished difference Result 184 states and 418 transitions. [2019-12-27 04:38:53,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 04:38:53,542 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:53,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:53,543 INFO L225 Difference]: With dead ends: 184 [2019-12-27 04:38:53,543 INFO L226 Difference]: Without dead ends: 183 [2019-12-27 04:38:53,544 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2019-12-27 04:38:53,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-12-27 04:38:53,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 144. [2019-12-27 04:38:53,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-12-27 04:38:53,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 347 transitions. [2019-12-27 04:38:53,548 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 347 transitions. Word has length 13 [2019-12-27 04:38:53,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:53,548 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 347 transitions. [2019-12-27 04:38:53,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:53,549 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 347 transitions. [2019-12-27 04:38:53,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:53,549 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:53,549 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:53,750 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:53,750 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:53,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:53,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505741, now seen corresponding path program 31 times [2019-12-27 04:38:53,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:53,752 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163405953] [2019-12-27 04:38:53,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:53,827 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 04:38:53,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163405953] [2019-12-27 04:38:53,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303704076] [2019-12-27 04:38:53,827 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:53,883 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:53,884 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:53,990 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 04:38:53,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:53,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:53,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989664774] [2019-12-27 04:38:53,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:53,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:53,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:53,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:53,992 INFO L87 Difference]: Start difference. First operand 144 states and 347 transitions. Second operand 16 states. [2019-12-27 04:38:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:54,382 INFO L93 Difference]: Finished difference Result 191 states and 435 transitions. [2019-12-27 04:38:54,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:38:54,384 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:54,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:54,386 INFO L225 Difference]: With dead ends: 191 [2019-12-27 04:38:54,386 INFO L226 Difference]: Without dead ends: 189 [2019-12-27 04:38:54,387 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 04:38:54,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-12-27 04:38:54,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 149. [2019-12-27 04:38:54,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 04:38:54,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2019-12-27 04:38:54,391 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2019-12-27 04:38:54,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:54,391 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2019-12-27 04:38:54,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:54,391 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2019-12-27 04:38:54,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:54,392 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:54,392 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:54,595 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:54,595 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:54,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:54,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1689505586, now seen corresponding path program 32 times [2019-12-27 04:38:54,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:54,596 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651994024] [2019-12-27 04:38:54,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:54,677 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 04:38:54,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651994024] [2019-12-27 04:38:54,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109782470] [2019-12-27 04:38:54,678 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:54,723 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:38:54,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:54,724 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:54,724 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:54,951 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 04:38:54,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:54,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:54,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641515553] [2019-12-27 04:38:54,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:54,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:54,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:54,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:38:54,954 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 16 states. [2019-12-27 04:38:55,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:38:55,873 INFO L93 Difference]: Finished difference Result 205 states and 469 transitions. [2019-12-27 04:38:55,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:38:55,873 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:38:55,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:38:55,875 INFO L225 Difference]: With dead ends: 205 [2019-12-27 04:38:55,875 INFO L226 Difference]: Without dead ends: 204 [2019-12-27 04:38:55,876 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=264, Invalid=547, Unknown=1, NotChecked=0, Total=812 [2019-12-27 04:38:55,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-27 04:38:55,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 148. [2019-12-27 04:38:55,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-12-27 04:38:55,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 363 transitions. [2019-12-27 04:38:55,881 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 363 transitions. Word has length 13 [2019-12-27 04:38:55,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:38:55,882 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 363 transitions. [2019-12-27 04:38:55,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:38:55,882 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 363 transitions. [2019-12-27 04:38:55,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:38:55,882 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:38:55,883 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:38:56,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:56,086 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:38:56,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:38:56,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500936, now seen corresponding path program 33 times [2019-12-27 04:38:56,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:38:56,087 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032572456] [2019-12-27 04:38:56,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:38:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:38:56,165 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 04:38:56,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032572456] [2019-12-27 04:38:56,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318980949] [2019-12-27 04:38:56,166 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:38:56,211 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:38:56,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:38:56,212 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:38:56,213 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:38:58,349 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 04:38:58,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:38:58,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:38:58,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622783260] [2019-12-27 04:38:58,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:38:58,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:38:58,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:38:58,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=177, Unknown=2, NotChecked=0, Total=240 [2019-12-27 04:38:58,351 INFO L87 Difference]: Start difference. First operand 148 states and 363 transitions. Second operand 16 states. [2019-12-27 04:38:59,796 WARN L192 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2019-12-27 04:39:00,105 WARN L192 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2019-12-27 04:39:00,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:00,453 INFO L93 Difference]: Finished difference Result 204 states and 465 transitions. [2019-12-27 04:39:00,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:39:00,454 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:00,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:00,455 INFO L225 Difference]: With dead ends: 204 [2019-12-27 04:39:00,455 INFO L226 Difference]: Without dead ends: 203 [2019-12-27 04:39:00,456 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=196, Invalid=451, Unknown=3, NotChecked=0, Total=650 [2019-12-27 04:39:00,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-12-27 04:39:00,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 149. [2019-12-27 04:39:00,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 04:39:00,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2019-12-27 04:39:00,460 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2019-12-27 04:39:00,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:00,460 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2019-12-27 04:39:00,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:00,461 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2019-12-27 04:39:00,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:00,461 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:00,461 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:00,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:00,663 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:00,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:00,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1689500781, now seen corresponding path program 34 times [2019-12-27 04:39:00,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:00,663 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910928174] [2019-12-27 04:39:00,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:00,742 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 04:39:00,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910928174] [2019-12-27 04:39:00,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561095293] [2019-12-27 04:39:00,742 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:00,784 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:00,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:00,785 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:00,786 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:01,196 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 04:39:01,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:01,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:01,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192806351] [2019-12-27 04:39:01,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:01,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:01,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:01,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:01,198 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 16 states. [2019-12-27 04:39:01,817 WARN L192 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2019-12-27 04:39:04,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:04,291 INFO L93 Difference]: Finished difference Result 198 states and 453 transitions. [2019-12-27 04:39:04,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:04,291 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:04,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:04,293 INFO L225 Difference]: With dead ends: 198 [2019-12-27 04:39:04,293 INFO L226 Difference]: Without dead ends: 197 [2019-12-27 04:39:04,294 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=235, Invalid=518, Unknown=3, NotChecked=0, Total=756 [2019-12-27 04:39:04,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-12-27 04:39:04,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 149. [2019-12-27 04:39:04,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-12-27 04:39:04,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 364 transitions. [2019-12-27 04:39:04,298 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 364 transitions. Word has length 13 [2019-12-27 04:39:04,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:04,299 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 364 transitions. [2019-12-27 04:39:04,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:04,299 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 364 transitions. [2019-12-27 04:39:04,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:04,299 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:04,299 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:04,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:04,503 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:04,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:04,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1721828821, now seen corresponding path program 35 times [2019-12-27 04:39:04,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:04,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147728480] [2019-12-27 04:39:04,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:04,586 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 04:39:04,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147728480] [2019-12-27 04:39:04,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708211704] [2019-12-27 04:39:04,586 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:04,631 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:04,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:04,633 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:04,633 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:04,773 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 04:39:04,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:04,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:04,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807970037] [2019-12-27 04:39:04,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:04,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:04,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:04,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:04,775 INFO L87 Difference]: Start difference. First operand 149 states and 364 transitions. Second operand 16 states. [2019-12-27 04:39:05,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:05,217 INFO L93 Difference]: Finished difference Result 219 states and 496 transitions. [2019-12-27 04:39:05,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:39:05,218 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:05,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:05,219 INFO L225 Difference]: With dead ends: 219 [2019-12-27 04:39:05,219 INFO L226 Difference]: Without dead ends: 217 [2019-12-27 04:39:05,220 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 04:39:05,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-12-27 04:39:05,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 152. [2019-12-27 04:39:05,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-12-27 04:39:05,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 376 transitions. [2019-12-27 04:39:05,225 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 376 transitions. Word has length 13 [2019-12-27 04:39:05,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:05,225 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 376 transitions. [2019-12-27 04:39:05,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:05,225 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 376 transitions. [2019-12-27 04:39:05,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:05,226 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:05,226 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:05,429 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:05,429 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:05,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:05,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824171, now seen corresponding path program 36 times [2019-12-27 04:39:05,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:05,430 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506096334] [2019-12-27 04:39:05,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:05,508 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 04:39:05,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506096334] [2019-12-27 04:39:05,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165012973] [2019-12-27 04:39:05,508 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:05,561 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:39:05,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:05,562 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:05,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:05,722 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 04:39:05,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:05,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:05,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695174541] [2019-12-27 04:39:05,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:05,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:05,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:05,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:05,723 INFO L87 Difference]: Start difference. First operand 152 states and 376 transitions. Second operand 16 states. [2019-12-27 04:39:06,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:06,150 INFO L93 Difference]: Finished difference Result 227 states and 516 transitions. [2019-12-27 04:39:06,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:39:06,151 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:06,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:06,153 INFO L225 Difference]: With dead ends: 227 [2019-12-27 04:39:06,153 INFO L226 Difference]: Without dead ends: 225 [2019-12-27 04:39:06,153 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2019-12-27 04:39:06,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2019-12-27 04:39:06,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 154. [2019-12-27 04:39:06,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 04:39:06,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 384 transitions. [2019-12-27 04:39:06,158 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 384 transitions. Word has length 13 [2019-12-27 04:39:06,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:06,158 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 384 transitions. [2019-12-27 04:39:06,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:06,158 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 384 transitions. [2019-12-27 04:39:06,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:06,159 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:06,159 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:06,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:06,362 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:06,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:06,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1721824016, now seen corresponding path program 37 times [2019-12-27 04:39:06,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:06,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996621965] [2019-12-27 04:39:06,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:06,447 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 04:39:06,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996621965] [2019-12-27 04:39:06,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554951170] [2019-12-27 04:39:06,448 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:06,499 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:06,500 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:06,766 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 04:39:06,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:06,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:06,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130264098] [2019-12-27 04:39:06,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:06,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:06,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:06,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:06,769 INFO L87 Difference]: Start difference. First operand 154 states and 384 transitions. Second operand 16 states. [2019-12-27 04:39:07,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:07,379 INFO L93 Difference]: Finished difference Result 223 states and 514 transitions. [2019-12-27 04:39:07,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 04:39:07,379 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:07,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:07,381 INFO L225 Difference]: With dead ends: 223 [2019-12-27 04:39:07,382 INFO L226 Difference]: Without dead ends: 221 [2019-12-27 04:39:07,382 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2019-12-27 04:39:07,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-12-27 04:39:07,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 156. [2019-12-27 04:39:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 04:39:07,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 389 transitions. [2019-12-27 04:39:07,386 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 389 transitions. Word has length 13 [2019-12-27 04:39:07,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:07,387 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 389 transitions. [2019-12-27 04:39:07,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:07,387 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 389 transitions. [2019-12-27 04:39:07,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:07,387 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:07,387 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:07,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:07,591 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:07,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:07,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1721680021, now seen corresponding path program 38 times [2019-12-27 04:39:07,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:07,592 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446673324] [2019-12-27 04:39:07,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:07,663 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 04:39:07,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446673324] [2019-12-27 04:39:07,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34858598] [2019-12-27 04:39:07,664 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:07,707 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:39:07,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:07,708 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:07,708 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:08,381 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 04:39:08,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:08,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:08,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391267766] [2019-12-27 04:39:08,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:08,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:08,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:08,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=179, Unknown=1, NotChecked=0, Total=240 [2019-12-27 04:39:08,383 INFO L87 Difference]: Start difference. First operand 156 states and 389 transitions. Second operand 16 states. [2019-12-27 04:39:08,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:08,858 INFO L93 Difference]: Finished difference Result 215 states and 500 transitions. [2019-12-27 04:39:08,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:08,859 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:08,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:08,861 INFO L225 Difference]: With dead ends: 215 [2019-12-27 04:39:08,861 INFO L226 Difference]: Without dead ends: 214 [2019-12-27 04:39:08,861 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=207, Invalid=494, Unknown=1, NotChecked=0, Total=702 [2019-12-27 04:39:08,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-12-27 04:39:08,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 157. [2019-12-27 04:39:08,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 04:39:08,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 393 transitions. [2019-12-27 04:39:08,866 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 393 transitions. Word has length 13 [2019-12-27 04:39:08,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:08,867 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 393 transitions. [2019-12-27 04:39:08,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:08,867 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 393 transitions. [2019-12-27 04:39:08,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:08,868 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:08,868 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:09,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:09,071 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:09,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:09,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1721679866, now seen corresponding path program 39 times [2019-12-27 04:39:09,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:09,072 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936899570] [2019-12-27 04:39:09,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:09,174 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 04:39:09,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936899570] [2019-12-27 04:39:09,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580433599] [2019-12-27 04:39:09,175 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:09,216 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:39:09,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:09,217 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:09,218 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:09,398 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 04:39:09,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:09,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:09,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509904286] [2019-12-27 04:39:09,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:09,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:09,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:09,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:09,400 INFO L87 Difference]: Start difference. First operand 157 states and 393 transitions. Second operand 16 states. [2019-12-27 04:39:09,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:09,800 INFO L93 Difference]: Finished difference Result 218 states and 506 transitions. [2019-12-27 04:39:09,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:39:09,801 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:09,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:09,803 INFO L225 Difference]: With dead ends: 218 [2019-12-27 04:39:09,803 INFO L226 Difference]: Without dead ends: 217 [2019-12-27 04:39:09,804 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 04:39:09,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-12-27 04:39:09,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 156. [2019-12-27 04:39:09,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 04:39:09,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 389 transitions. [2019-12-27 04:39:09,808 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 389 transitions. Word has length 13 [2019-12-27 04:39:09,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:09,808 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 389 transitions. [2019-12-27 04:39:09,808 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:09,809 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 389 transitions. [2019-12-27 04:39:09,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:09,809 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:09,809 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:10,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:10,013 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:10,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:10,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1721675216, now seen corresponding path program 40 times [2019-12-27 04:39:10,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:10,013 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823376140] [2019-12-27 04:39:10,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:10,086 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 04:39:10,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823376140] [2019-12-27 04:39:10,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791558850] [2019-12-27 04:39:10,087 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:10,129 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:10,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:10,130 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:10,130 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:12,313 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 04:39:12,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:12,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:12,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088421862] [2019-12-27 04:39:12,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:12,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:12,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:12,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:12,315 INFO L87 Difference]: Start difference. First operand 156 states and 389 transitions. Second operand 16 states. [2019-12-27 04:39:14,456 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-27 04:39:15,036 WARN L192 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2019-12-27 04:39:17,295 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-27 04:39:17,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:17,429 INFO L93 Difference]: Finished difference Result 214 states and 499 transitions. [2019-12-27 04:39:17,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:39:17,430 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:17,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:17,431 INFO L225 Difference]: With dead ends: 214 [2019-12-27 04:39:17,431 INFO L226 Difference]: Without dead ends: 213 [2019-12-27 04:39:17,431 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2019-12-27 04:39:17,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-12-27 04:39:17,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 154. [2019-12-27 04:39:17,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 04:39:17,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 381 transitions. [2019-12-27 04:39:17,439 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 381 transitions. Word has length 13 [2019-12-27 04:39:17,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:17,439 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 381 transitions. [2019-12-27 04:39:17,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:17,439 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 381 transitions. [2019-12-27 04:39:17,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:17,440 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:17,440 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:17,640 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:17,641 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:17,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:17,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1571118035, now seen corresponding path program 41 times [2019-12-27 04:39:17,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:17,642 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714474687] [2019-12-27 04:39:17,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:17,713 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 04:39:17,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714474687] [2019-12-27 04:39:17,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759604278] [2019-12-27 04:39:17,714 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:17,755 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:17,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:17,757 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:17,757 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:17,861 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 04:39:17,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:17,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:17,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678116250] [2019-12-27 04:39:17,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:17,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:17,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:17,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:17,863 INFO L87 Difference]: Start difference. First operand 154 states and 381 transitions. Second operand 16 states. [2019-12-27 04:39:18,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:18,173 INFO L93 Difference]: Finished difference Result 177 states and 408 transitions. [2019-12-27 04:39:18,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 04:39:18,173 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:18,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:18,175 INFO L225 Difference]: With dead ends: 177 [2019-12-27 04:39:18,175 INFO L226 Difference]: Without dead ends: 176 [2019-12-27 04:39:18,175 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 04:39:18,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-12-27 04:39:18,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 153. [2019-12-27 04:39:18,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-12-27 04:39:18,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 374 transitions. [2019-12-27 04:39:18,180 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 374 transitions. Word has length 13 [2019-12-27 04:39:18,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:18,180 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 374 transitions. [2019-12-27 04:39:18,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:18,180 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 374 transitions. [2019-12-27 04:39:18,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:18,181 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:18,181 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:18,384 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:18,385 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:18,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:18,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1571266990, now seen corresponding path program 42 times [2019-12-27 04:39:18,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:18,386 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258166998] [2019-12-27 04:39:18,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:18,476 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 04:39:18,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258166998] [2019-12-27 04:39:18,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494384197] [2019-12-27 04:39:18,476 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:18,521 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:39:18,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:18,522 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:18,523 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:18,822 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 04:39:18,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:18,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:18,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043424473] [2019-12-27 04:39:18,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:18,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:18,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:18,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:18,824 INFO L87 Difference]: Start difference. First operand 153 states and 374 transitions. Second operand 16 states. [2019-12-27 04:39:19,803 WARN L192 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-27 04:39:20,301 WARN L192 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-27 04:39:20,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:20,328 INFO L93 Difference]: Finished difference Result 229 states and 515 transitions. [2019-12-27 04:39:20,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:39:20,329 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:20,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:20,331 INFO L225 Difference]: With dead ends: 229 [2019-12-27 04:39:20,331 INFO L226 Difference]: Without dead ends: 227 [2019-12-27 04:39:20,331 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2019-12-27 04:39:20,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-12-27 04:39:20,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 155. [2019-12-27 04:39:20,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-12-27 04:39:20,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 382 transitions. [2019-12-27 04:39:20,336 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 382 transitions. Word has length 13 [2019-12-27 04:39:20,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:20,336 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 382 transitions. [2019-12-27 04:39:20,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:20,336 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 382 transitions. [2019-12-27 04:39:20,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:20,337 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:20,337 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:20,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:20,540 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:20,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:20,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1571267145, now seen corresponding path program 43 times [2019-12-27 04:39:20,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:20,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020085413] [2019-12-27 04:39:20,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:20,612 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 04:39:20,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020085413] [2019-12-27 04:39:20,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696655024] [2019-12-27 04:39:20,613 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:20,653 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:20,654 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:21,226 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 04:39:21,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:21,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:21,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623518839] [2019-12-27 04:39:21,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:21,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:21,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:21,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:21,228 INFO L87 Difference]: Start difference. First operand 155 states and 382 transitions. Second operand 16 states. [2019-12-27 04:39:21,718 WARN L192 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-27 04:39:22,448 WARN L192 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-27 04:39:23,635 WARN L192 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2019-12-27 04:39:23,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:23,695 INFO L93 Difference]: Finished difference Result 243 states and 558 transitions. [2019-12-27 04:39:23,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:23,696 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:23,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:23,698 INFO L225 Difference]: With dead ends: 243 [2019-12-27 04:39:23,698 INFO L226 Difference]: Without dead ends: 241 [2019-12-27 04:39:23,698 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2019-12-27 04:39:23,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-12-27 04:39:23,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 159. [2019-12-27 04:39:23,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-12-27 04:39:23,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 398 transitions. [2019-12-27 04:39:23,703 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 398 transitions. Word has length 13 [2019-12-27 04:39:23,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:23,703 INFO L462 AbstractCegarLoop]: Abstraction has 159 states and 398 transitions. [2019-12-27 04:39:23,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:23,703 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 398 transitions. [2019-12-27 04:39:23,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:23,704 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:23,704 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:23,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:23,907 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:23,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:23,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1571271795, now seen corresponding path program 44 times [2019-12-27 04:39:23,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:23,909 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236662590] [2019-12-27 04:39:23,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:23,997 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 04:39:23,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236662590] [2019-12-27 04:39:23,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770342360] [2019-12-27 04:39:23,998 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:24,048 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:39:24,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:24,049 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:24,050 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:24,381 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 04:39:24,382 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 04:39:24,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:24,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:24,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113788752] [2019-12-27 04:39:24,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:24,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:24,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:24,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:24,384 INFO L87 Difference]: Start difference. First operand 159 states and 398 transitions. Second operand 16 states. [2019-12-27 04:39:25,302 WARN L192 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-27 04:39:25,922 WARN L192 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-27 04:39:25,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:25,973 INFO L93 Difference]: Finished difference Result 240 states and 552 transitions. [2019-12-27 04:39:25,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:39:25,973 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:25,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:25,975 INFO L225 Difference]: With dead ends: 240 [2019-12-27 04:39:25,975 INFO L226 Difference]: Without dead ends: 238 [2019-12-27 04:39:25,976 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2019-12-27 04:39:25,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-12-27 04:39:25,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 160. [2019-12-27 04:39:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-12-27 04:39:25,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 402 transitions. [2019-12-27 04:39:25,979 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 402 transitions. Word has length 13 [2019-12-27 04:39:25,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:25,980 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 402 transitions. [2019-12-27 04:39:25,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:25,980 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 402 transitions. [2019-12-27 04:39:25,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:25,981 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:25,981 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:26,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:26,184 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:26,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:26,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735640, now seen corresponding path program 45 times [2019-12-27 04:39:26,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:26,185 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409818656] [2019-12-27 04:39:26,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:26,248 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 04:39:26,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409818656] [2019-12-27 04:39:26,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826996786] [2019-12-27 04:39:26,249 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:26,289 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 04:39:26,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:26,295 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:26,296 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:26,388 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 04:39:26,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:26,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:26,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422959484] [2019-12-27 04:39:26,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:26,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:26,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:26,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:26,390 INFO L87 Difference]: Start difference. First operand 160 states and 402 transitions. Second operand 16 states. [2019-12-27 04:39:26,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:26,782 INFO L93 Difference]: Finished difference Result 239 states and 550 transitions. [2019-12-27 04:39:26,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:39:26,782 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:26,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:26,784 INFO L225 Difference]: With dead ends: 239 [2019-12-27 04:39:26,784 INFO L226 Difference]: Without dead ends: 237 [2019-12-27 04:39:26,785 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=287, Invalid=705, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:39:26,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-27 04:39:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 165. [2019-12-27 04:39:26,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-12-27 04:39:26,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 422 transitions. [2019-12-27 04:39:26,789 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 422 transitions. Word has length 13 [2019-12-27 04:39:26,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:26,789 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 422 transitions. [2019-12-27 04:39:26,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:26,789 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 422 transitions. [2019-12-27 04:39:26,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:26,790 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:26,790 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:26,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:26,991 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:26,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:26,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1575735795, now seen corresponding path program 46 times [2019-12-27 04:39:26,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:26,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023792958] [2019-12-27 04:39:26,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:27,068 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 04:39:27,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023792958] [2019-12-27 04:39:27,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561739778] [2019-12-27 04:39:27,069 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:27,114 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:27,114 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:27,115 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:27,115 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:27,213 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 04:39:27,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:27,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:27,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84930081] [2019-12-27 04:39:27,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:27,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:27,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:27,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:27,215 INFO L87 Difference]: Start difference. First operand 165 states and 422 transitions. Second operand 16 states. [2019-12-27 04:39:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:27,591 INFO L93 Difference]: Finished difference Result 245 states and 574 transitions. [2019-12-27 04:39:27,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:39:27,592 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:27,594 INFO L225 Difference]: With dead ends: 245 [2019-12-27 04:39:27,594 INFO L226 Difference]: Without dead ends: 243 [2019-12-27 04:39:27,594 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 04:39:27,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-12-27 04:39:27,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 165. [2019-12-27 04:39:27,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-12-27 04:39:27,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 422 transitions. [2019-12-27 04:39:27,598 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 422 transitions. Word has length 13 [2019-12-27 04:39:27,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:27,598 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 422 transitions. [2019-12-27 04:39:27,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:27,598 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 422 transitions. [2019-12-27 04:39:27,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:27,599 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:27,599 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:27,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:27,801 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:27,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:27,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740445, now seen corresponding path program 47 times [2019-12-27 04:39:27,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:27,802 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449992794] [2019-12-27 04:39:27,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:27,875 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 04:39:27,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449992794] [2019-12-27 04:39:27,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114948435] [2019-12-27 04:39:27,875 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:27,918 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:27,918 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:27,919 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:27,920 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:28,026 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 04:39:28,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:28,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:28,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258491020] [2019-12-27 04:39:28,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:28,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:28,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:28,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:28,028 INFO L87 Difference]: Start difference. First operand 165 states and 422 transitions. Second operand 16 states. [2019-12-27 04:39:28,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:28,319 INFO L93 Difference]: Finished difference Result 250 states and 579 transitions. [2019-12-27 04:39:28,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:28,319 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:28,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:28,321 INFO L225 Difference]: With dead ends: 250 [2019-12-27 04:39:28,321 INFO L226 Difference]: Without dead ends: 248 [2019-12-27 04:39:28,322 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 04:39:28,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2019-12-27 04:39:28,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 164. [2019-12-27 04:39:28,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-12-27 04:39:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 418 transitions. [2019-12-27 04:39:28,325 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 418 transitions. Word has length 13 [2019-12-27 04:39:28,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:28,326 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 418 transitions. [2019-12-27 04:39:28,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:28,326 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 418 transitions. [2019-12-27 04:39:28,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:28,326 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:28,326 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:28,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:28,527 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:28,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:28,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1575740600, now seen corresponding path program 48 times [2019-12-27 04:39:28,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:28,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618613444] [2019-12-27 04:39:28,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:28,599 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 04:39:28,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618613444] [2019-12-27 04:39:28,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568509491] [2019-12-27 04:39:28,600 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:28,646 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:39:28,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:28,647 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:28,648 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:28,750 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 04:39:28,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:28,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:28,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308953498] [2019-12-27 04:39:28,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:28,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:28,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:28,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:28,752 INFO L87 Difference]: Start difference. First operand 164 states and 418 transitions. Second operand 16 states. [2019-12-27 04:39:29,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:29,163 INFO L93 Difference]: Finished difference Result 244 states and 565 transitions. [2019-12-27 04:39:29,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:39:29,164 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:29,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:29,166 INFO L225 Difference]: With dead ends: 244 [2019-12-27 04:39:29,166 INFO L226 Difference]: Without dead ends: 242 [2019-12-27 04:39:29,166 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 04:39:29,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-12-27 04:39:29,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 164. [2019-12-27 04:39:29,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-12-27 04:39:29,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2019-12-27 04:39:29,170 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 13 [2019-12-27 04:39:29,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:29,170 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2019-12-27 04:39:29,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:29,170 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2019-12-27 04:39:29,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:29,171 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:29,171 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:29,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:29,375 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:29,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:29,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1575884595, now seen corresponding path program 49 times [2019-12-27 04:39:29,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:29,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578123017] [2019-12-27 04:39:29,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:29,509 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 04:39:29,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578123017] [2019-12-27 04:39:29,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352203255] [2019-12-27 04:39:29,510 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:29,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:29,555 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:29,556 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:29,694 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 04:39:29,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:29,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:29,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974099544] [2019-12-27 04:39:29,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:29,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:29,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:29,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:29,696 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 16 states. [2019-12-27 04:39:30,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:30,127 INFO L93 Difference]: Finished difference Result 239 states and 553 transitions. [2019-12-27 04:39:30,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:39:30,127 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:30,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:30,129 INFO L225 Difference]: With dead ends: 239 [2019-12-27 04:39:30,129 INFO L226 Difference]: Without dead ends: 237 [2019-12-27 04:39:30,130 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 04:39:30,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-12-27 04:39:30,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 162. [2019-12-27 04:39:30,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-27 04:39:30,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2019-12-27 04:39:30,133 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 13 [2019-12-27 04:39:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:30,134 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2019-12-27 04:39:30,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2019-12-27 04:39:30,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:30,135 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:30,135 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:30,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:30,338 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:30,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:30,338 INFO L82 PathProgramCache]: Analyzing trace with hash -573260427, now seen corresponding path program 50 times [2019-12-27 04:39:30,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:30,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070463685] [2019-12-27 04:39:30,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:30,434 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 04:39:30,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070463685] [2019-12-27 04:39:30,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483465006] [2019-12-27 04:39:30,435 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:30,502 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:39:30,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:30,503 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:30,504 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:30,649 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 04:39:30,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:30,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:30,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838423301] [2019-12-27 04:39:30,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:30,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:30,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:30,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:30,652 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 16 states. [2019-12-27 04:39:30,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:30,955 INFO L93 Difference]: Finished difference Result 193 states and 448 transitions. [2019-12-27 04:39:30,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 04:39:30,956 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:30,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:30,957 INFO L225 Difference]: With dead ends: 193 [2019-12-27 04:39:30,958 INFO L226 Difference]: Without dead ends: 192 [2019-12-27 04:39:30,958 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 04:39:30,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-12-27 04:39:30,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 162. [2019-12-27 04:39:30,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-12-27 04:39:30,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2019-12-27 04:39:30,961 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 13 [2019-12-27 04:39:30,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:30,962 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2019-12-27 04:39:30,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:30,962 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2019-12-27 04:39:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:30,963 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:30,963 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:31,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:31,166 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:31,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:31,167 INFO L82 PathProgramCache]: Analyzing trace with hash -573265232, now seen corresponding path program 51 times [2019-12-27 04:39:31,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:31,167 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544612577] [2019-12-27 04:39:31,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:31,239 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 04:39:31,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544612577] [2019-12-27 04:39:31,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323310950] [2019-12-27 04:39:31,240 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:31,281 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:39:31,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:31,282 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 04:39:31,282 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:31,370 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 04:39:31,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:31,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:31,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883020434] [2019-12-27 04:39:31,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:31,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:31,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:31,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:31,372 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 16 states. [2019-12-27 04:39:31,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:31,584 INFO L93 Difference]: Finished difference Result 205 states and 469 transitions. [2019-12-27 04:39:31,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 04:39:31,584 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:31,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:31,586 INFO L225 Difference]: With dead ends: 205 [2019-12-27 04:39:31,586 INFO L226 Difference]: Without dead ends: 204 [2019-12-27 04:39:31,587 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 04:39:31,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-12-27 04:39:31,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 161. [2019-12-27 04:39:31,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-12-27 04:39:31,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2019-12-27 04:39:31,591 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 13 [2019-12-27 04:39:31,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:31,591 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2019-12-27 04:39:31,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:31,592 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2019-12-27 04:39:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:31,592 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:31,592 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:31,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:31,794 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:31,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:31,795 INFO L82 PathProgramCache]: Analyzing trace with hash -573414187, now seen corresponding path program 52 times [2019-12-27 04:39:31,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:31,795 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622746823] [2019-12-27 04:39:31,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:31,864 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 04:39:31,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622746823] [2019-12-27 04:39:31,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370509321] [2019-12-27 04:39:31,865 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:31,908 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:31,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:31,908 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:31,909 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:32,010 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 04:39:32,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:32,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:32,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109787468] [2019-12-27 04:39:32,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:32,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:32,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:32,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:32,012 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 16 states. [2019-12-27 04:39:32,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:32,380 INFO L93 Difference]: Finished difference Result 208 states and 473 transitions. [2019-12-27 04:39:32,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:39:32,380 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:32,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:32,382 INFO L225 Difference]: With dead ends: 208 [2019-12-27 04:39:32,382 INFO L226 Difference]: Without dead ends: 206 [2019-12-27 04:39:32,382 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 04:39:32,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-12-27 04:39:32,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 157. [2019-12-27 04:39:32,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-12-27 04:39:32,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 387 transitions. [2019-12-27 04:39:32,387 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 387 transitions. Word has length 13 [2019-12-27 04:39:32,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:32,387 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 387 transitions. [2019-12-27 04:39:32,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:32,387 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 387 transitions. [2019-12-27 04:39:32,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:32,388 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:32,388 INFO L411 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:32,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:32,591 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:32,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:32,591 INFO L82 PathProgramCache]: Analyzing trace with hash -716554982, now seen corresponding path program 53 times [2019-12-27 04:39:32,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:32,591 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577211191] [2019-12-27 04:39:32,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:32,678 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 04:39:32,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577211191] [2019-12-27 04:39:32,679 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93701133] [2019-12-27 04:39:32,679 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:32,722 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:32,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:32,723 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:32,724 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:32,846 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 04:39:32,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:32,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:32,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731458779] [2019-12-27 04:39:32,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:32,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:32,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:32,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:32,848 INFO L87 Difference]: Start difference. First operand 157 states and 387 transitions. Second operand 16 states. [2019-12-27 04:39:33,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:33,352 INFO L93 Difference]: Finished difference Result 231 states and 525 transitions. [2019-12-27 04:39:33,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:39:33,353 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:33,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:33,354 INFO L225 Difference]: With dead ends: 231 [2019-12-27 04:39:33,354 INFO L226 Difference]: Without dead ends: 230 [2019-12-27 04:39:33,355 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2019-12-27 04:39:33,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-12-27 04:39:33,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 158. [2019-12-27 04:39:33,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-12-27 04:39:33,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 391 transitions. [2019-12-27 04:39:33,359 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 391 transitions. Word has length 13 [2019-12-27 04:39:33,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:33,359 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 391 transitions. [2019-12-27 04:39:33,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:33,360 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 391 transitions. [2019-12-27 04:39:33,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:33,360 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:33,360 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:33,561 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:33,561 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:33,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:33,561 INFO L82 PathProgramCache]: Analyzing trace with hash -716555137, now seen corresponding path program 54 times [2019-12-27 04:39:33,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:33,562 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961684716] [2019-12-27 04:39:33,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:33,647 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 04:39:33,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961684716] [2019-12-27 04:39:33,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681148821] [2019-12-27 04:39:33,647 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:33,695 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:39:33,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:33,696 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:33,697 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:33,818 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 04:39:33,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:33,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:33,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788826164] [2019-12-27 04:39:33,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:33,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:33,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:33,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:33,820 INFO L87 Difference]: Start difference. First operand 158 states and 391 transitions. Second operand 16 states. [2019-12-27 04:39:34,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:34,112 INFO L93 Difference]: Finished difference Result 237 states and 541 transitions. [2019-12-27 04:39:34,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:34,112 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:34,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:34,114 INFO L225 Difference]: With dead ends: 237 [2019-12-27 04:39:34,114 INFO L226 Difference]: Without dead ends: 235 [2019-12-27 04:39:34,115 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 04:39:34,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-12-27 04:39:34,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 156. [2019-12-27 04:39:34,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-12-27 04:39:34,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 383 transitions. [2019-12-27 04:39:34,118 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 383 transitions. Word has length 13 [2019-12-27 04:39:34,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:34,118 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 383 transitions. [2019-12-27 04:39:34,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:34,118 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 383 transitions. [2019-12-27 04:39:34,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:34,119 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:34,119 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:34,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:34,319 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:34,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:34,320 INFO L82 PathProgramCache]: Analyzing trace with hash -716559787, now seen corresponding path program 55 times [2019-12-27 04:39:34,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:34,320 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316595508] [2019-12-27 04:39:34,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:34,412 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 04:39:34,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316595508] [2019-12-27 04:39:34,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250493829] [2019-12-27 04:39:34,413 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:34,456 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:34,457 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:34,615 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 04:39:34,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:34,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:34,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131993673] [2019-12-27 04:39:34,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:34,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:34,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:34,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:34,617 INFO L87 Difference]: Start difference. First operand 156 states and 383 transitions. Second operand 16 states. [2019-12-27 04:39:35,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:35,043 INFO L93 Difference]: Finished difference Result 236 states and 537 transitions. [2019-12-27 04:39:35,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:39:35,043 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:35,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:35,045 INFO L225 Difference]: With dead ends: 236 [2019-12-27 04:39:35,045 INFO L226 Difference]: Without dead ends: 234 [2019-12-27 04:39:35,046 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 04:39:35,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-12-27 04:39:35,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 154. [2019-12-27 04:39:35,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 04:39:35,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 375 transitions. [2019-12-27 04:39:35,049 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 375 transitions. Word has length 13 [2019-12-27 04:39:35,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:35,050 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 375 transitions. [2019-12-27 04:39:35,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:35,050 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 375 transitions. [2019-12-27 04:39:35,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:35,051 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:35,051 INFO L411 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:35,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:35,254 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:35,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:35,255 INFO L82 PathProgramCache]: Analyzing trace with hash -721177547, now seen corresponding path program 56 times [2019-12-27 04:39:35,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:35,255 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856193321] [2019-12-27 04:39:35,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:35,340 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 04:39:35,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856193321] [2019-12-27 04:39:35,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130484579] [2019-12-27 04:39:35,341 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:35,380 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:39:35,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:35,380 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 04:39:35,381 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:35,490 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 04:39:35,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:35,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2019-12-27 04:39:35,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173791720] [2019-12-27 04:39:35,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 04:39:35,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:35,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 04:39:35,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-12-27 04:39:35,492 INFO L87 Difference]: Start difference. First operand 154 states and 375 transitions. Second operand 16 states. [2019-12-27 04:39:35,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:35,764 INFO L93 Difference]: Finished difference Result 176 states and 401 transitions. [2019-12-27 04:39:35,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 04:39:35,765 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-12-27 04:39:35,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:35,766 INFO L225 Difference]: With dead ends: 176 [2019-12-27 04:39:35,766 INFO L226 Difference]: Without dead ends: 175 [2019-12-27 04:39:35,767 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 04:39:35,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-12-27 04:39:35,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 154. [2019-12-27 04:39:35,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-27 04:39:35,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 363 transitions. [2019-12-27 04:39:35,770 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 363 transitions. Word has length 13 [2019-12-27 04:39:35,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:35,770 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 363 transitions. [2019-12-27 04:39:35,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 04:39:35,770 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 363 transitions. [2019-12-27 04:39:35,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 04:39:35,774 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:35,774 INFO L411 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:35,978 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:35,978 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:35,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:35,979 INFO L82 PathProgramCache]: Analyzing trace with hash -831836784, now seen corresponding path program 7 times [2019-12-27 04:39:35,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:35,979 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830239703] [2019-12-27 04:39:35,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:36,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830239703] [2019-12-27 04:39:36,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448950542] [2019-12-27 04:39:36,062 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 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 04:39:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:36,105 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 04:39:36,106 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 04:39:36,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 04:39:36,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 17 [2019-12-27 04:39:36,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491285390] [2019-12-27 04:39:36,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 04:39:36,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:36,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 04:39:36,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2019-12-27 04:39:36,186 INFO L87 Difference]: Start difference. First operand 154 states and 363 transitions. Second operand 9 states. [2019-12-27 04:39:36,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:36,211 INFO L93 Difference]: Finished difference Result 203 states and 483 transitions. [2019-12-27 04:39:36,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 04:39:36,218 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 04:39:36,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:36,219 INFO L225 Difference]: With dead ends: 203 [2019-12-27 04:39:36,219 INFO L226 Difference]: Without dead ends: 195 [2019-12-27 04:39:36,220 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2019-12-27 04:39:36,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-12-27 04:39:36,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2019-12-27 04:39:36,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2019-12-27 04:39:36,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 468 transitions. [2019-12-27 04:39:36,223 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 468 transitions. Word has length 13 [2019-12-27 04:39:36,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:36,224 INFO L462 AbstractCegarLoop]: Abstraction has 195 states and 468 transitions. [2019-12-27 04:39:36,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 04:39:36,224 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 468 transitions. [2019-12-27 04:39:36,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:36,225 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:36,225 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:36,427 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:36,428 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:36,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:36,428 INFO L82 PathProgramCache]: Analyzing trace with hash 801671507, now seen corresponding path program 57 times [2019-12-27 04:39:36,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:36,429 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340855036] [2019-12-27 04:39:36,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:36,509 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 04:39:36,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340855036] [2019-12-27 04:39:36,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648575001] [2019-12-27 04:39:36,510 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 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 04:39:36,560 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 04:39:36,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:36,561 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:36,562 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:36,690 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 04:39:36,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:36,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:36,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927926699] [2019-12-27 04:39:36,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:36,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:36,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:36,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:36,692 INFO L87 Difference]: Start difference. First operand 195 states and 468 transitions. Second operand 18 states. [2019-12-27 04:39:37,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:37,052 INFO L93 Difference]: Finished difference Result 220 states and 516 transitions. [2019-12-27 04:39:37,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 04:39:37,053 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:37,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:37,055 INFO L225 Difference]: With dead ends: 220 [2019-12-27 04:39:37,055 INFO L226 Difference]: Without dead ends: 218 [2019-12-27 04:39:37,055 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=254, Invalid=616, Unknown=0, NotChecked=0, Total=870 [2019-12-27 04:39:37,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-12-27 04:39:37,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 194. [2019-12-27 04:39:37,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-12-27 04:39:37,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 468 transitions. [2019-12-27 04:39:37,060 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 468 transitions. Word has length 14 [2019-12-27 04:39:37,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:37,060 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 468 transitions. [2019-12-27 04:39:37,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:37,060 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 468 transitions. [2019-12-27 04:39:37,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:37,061 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:37,061 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:37,264 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:37,264 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:37,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:37,265 INFO L82 PathProgramCache]: Analyzing trace with hash 801705142, now seen corresponding path program 58 times [2019-12-27 04:39:37,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:37,265 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564288685] [2019-12-27 04:39:37,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:37,371 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 04:39:37,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564288685] [2019-12-27 04:39:37,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524232850] [2019-12-27 04:39:37,372 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 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 04:39:37,414 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:37,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:37,415 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:37,416 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:37,545 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 04:39:37,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:37,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:37,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905095392] [2019-12-27 04:39:37,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:37,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:37,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:37,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:37,546 INFO L87 Difference]: Start difference. First operand 194 states and 468 transitions. Second operand 18 states. [2019-12-27 04:39:37,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:37,976 INFO L93 Difference]: Finished difference Result 242 states and 562 transitions. [2019-12-27 04:39:37,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:39:37,977 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:37,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:37,978 INFO L225 Difference]: With dead ends: 242 [2019-12-27 04:39:37,978 INFO L226 Difference]: Without dead ends: 241 [2019-12-27 04:39:37,978 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:39:37,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-12-27 04:39:37,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 196. [2019-12-27 04:39:37,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-12-27 04:39:37,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 476 transitions. [2019-12-27 04:39:37,981 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 476 transitions. Word has length 14 [2019-12-27 04:39:37,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:37,982 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 476 transitions. [2019-12-27 04:39:37,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:37,982 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 476 transitions. [2019-12-27 04:39:37,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:37,982 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:37,982 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:38,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:38,186 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:38,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:38,186 INFO L82 PathProgramCache]: Analyzing trace with hash 801704987, now seen corresponding path program 59 times [2019-12-27 04:39:38,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:38,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432759756] [2019-12-27 04:39:38,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:38,266 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 04:39:38,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432759756] [2019-12-27 04:39:38,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305666764] [2019-12-27 04:39:38,267 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 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 04:39:38,310 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 04:39:38,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:38,311 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:38,312 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:38,515 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 04:39:38,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:38,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:38,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874727106] [2019-12-27 04:39:38,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:38,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:38,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:38,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:38,516 INFO L87 Difference]: Start difference. First operand 196 states and 476 transitions. Second operand 18 states. [2019-12-27 04:39:39,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:39,239 INFO L93 Difference]: Finished difference Result 245 states and 569 transitions. [2019-12-27 04:39:39,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:39:39,240 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:39,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:39,242 INFO L225 Difference]: With dead ends: 245 [2019-12-27 04:39:39,242 INFO L226 Difference]: Without dead ends: 242 [2019-12-27 04:39:39,242 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=289, Invalid=641, Unknown=0, NotChecked=0, Total=930 [2019-12-27 04:39:39,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-12-27 04:39:39,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 196. [2019-12-27 04:39:39,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-12-27 04:39:39,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 475 transitions. [2019-12-27 04:39:39,246 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 475 transitions. Word has length 14 [2019-12-27 04:39:39,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:39,246 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 475 transitions. [2019-12-27 04:39:39,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:39,246 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 475 transitions. [2019-12-27 04:39:39,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:39,247 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:39,247 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:39,450 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:39,450 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:39,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:39,451 INFO L82 PathProgramCache]: Analyzing trace with hash 802747827, now seen corresponding path program 60 times [2019-12-27 04:39:39,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:39,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083688407] [2019-12-27 04:39:39,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:39,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:39,551 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 04:39:39,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083688407] [2019-12-27 04:39:39,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475871096] [2019-12-27 04:39:39,551 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 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 04:39:39,594 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:39:39,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:39,595 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:39,596 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:39,731 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 04:39:39,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:39,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:39,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919292529] [2019-12-27 04:39:39,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:39,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:39,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:39,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:39,733 INFO L87 Difference]: Start difference. First operand 196 states and 475 transitions. Second operand 18 states. [2019-12-27 04:39:40,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:40,152 INFO L93 Difference]: Finished difference Result 247 states and 575 transitions. [2019-12-27 04:39:40,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:39:40,153 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:40,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:40,155 INFO L225 Difference]: With dead ends: 247 [2019-12-27 04:39:40,155 INFO L226 Difference]: Without dead ends: 246 [2019-12-27 04:39:40,155 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 04:39:40,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-12-27 04:39:40,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 199. [2019-12-27 04:39:40,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-12-27 04:39:40,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 487 transitions. [2019-12-27 04:39:40,160 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 487 transitions. Word has length 14 [2019-12-27 04:39:40,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:40,161 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 487 transitions. [2019-12-27 04:39:40,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:40,161 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 487 transitions. [2019-12-27 04:39:40,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:40,161 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:40,161 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:40,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:40,365 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:40,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:40,365 INFO L82 PathProgramCache]: Analyzing trace with hash 802747672, now seen corresponding path program 61 times [2019-12-27 04:39:40,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:40,366 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679372623] [2019-12-27 04:39:40,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:40,447 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 04:39:40,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679372623] [2019-12-27 04:39:40,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908110059] [2019-12-27 04:39:40,448 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 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 04:39:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:40,491 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:40,492 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:40,654 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 04:39:40,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:40,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:40,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973261263] [2019-12-27 04:39:40,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:40,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:40,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:40,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:40,656 INFO L87 Difference]: Start difference. First operand 199 states and 487 transitions. Second operand 18 states. [2019-12-27 04:39:41,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:41,399 INFO L93 Difference]: Finished difference Result 276 states and 635 transitions. [2019-12-27 04:39:41,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:39:41,399 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:41,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:41,401 INFO L225 Difference]: With dead ends: 276 [2019-12-27 04:39:41,401 INFO L226 Difference]: Without dead ends: 275 [2019-12-27 04:39:41,401 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:39:41,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2019-12-27 04:39:41,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 199. [2019-12-27 04:39:41,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-12-27 04:39:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 487 transitions. [2019-12-27 04:39:41,406 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 487 transitions. Word has length 14 [2019-12-27 04:39:41,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:41,406 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 487 transitions. [2019-12-27 04:39:41,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:41,406 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 487 transitions. [2019-12-27 04:39:41,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:41,406 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:41,407 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:41,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:41,607 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:41,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:41,607 INFO L82 PathProgramCache]: Analyzing trace with hash 802743022, now seen corresponding path program 62 times [2019-12-27 04:39:41,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:41,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824605248] [2019-12-27 04:39:41,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:41,707 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 04:39:41,707 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824605248] [2019-12-27 04:39:41,707 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427736780] [2019-12-27 04:39:41,707 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 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 04:39:41,749 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:39:41,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:41,750 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:41,751 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:42,281 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_231 Int)) (and (<= c_~j~0 (+ c_~i~0 v_~j~0_231)) (<= c_~i~0 (+ v_~j~0_231 1)) (<= (div (+ (* v_~j~0_231 (- 1)) 1) (- 4)) 1))) is different from true [2019-12-27 04:39:42,316 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 04:39:42,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:42,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:42,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368803664] [2019-12-27 04:39:42,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:42,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:42,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:42,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=207, Unknown=1, NotChecked=30, Total=306 [2019-12-27 04:39:42,318 INFO L87 Difference]: Start difference. First operand 199 states and 487 transitions. Second operand 18 states. [2019-12-27 04:39:42,787 WARN L192 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-27 04:39:44,129 WARN L192 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2019-12-27 04:39:45,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:45,489 INFO L93 Difference]: Finished difference Result 284 states and 647 transitions. [2019-12-27 04:39:45,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 04:39:45,490 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:45,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:45,492 INFO L225 Difference]: With dead ends: 284 [2019-12-27 04:39:45,492 INFO L226 Difference]: Without dead ends: 282 [2019-12-27 04:39:45,493 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=309, Invalid=685, Unknown=2, NotChecked=60, Total=1056 [2019-12-27 04:39:45,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-12-27 04:39:45,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 200. [2019-12-27 04:39:45,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-12-27 04:39:45,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 491 transitions. [2019-12-27 04:39:45,496 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 491 transitions. Word has length 14 [2019-12-27 04:39:45,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:45,497 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 491 transitions. [2019-12-27 04:39:45,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:45,497 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 491 transitions. [2019-12-27 04:39:45,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:45,497 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:45,497 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:45,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:45,699 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:45,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:45,699 INFO L82 PathProgramCache]: Analyzing trace with hash 802742867, now seen corresponding path program 63 times [2019-12-27 04:39:45,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:45,700 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504087963] [2019-12-27 04:39:45,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:45,797 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 04:39:45,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504087963] [2019-12-27 04:39:45,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783452242] [2019-12-27 04:39:45,798 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 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 04:39:45,841 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 04:39:45,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:45,842 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:45,842 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:46,253 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 04:39:46,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:46,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:46,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319965846] [2019-12-27 04:39:46,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:46,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:46,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:46,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:46,256 INFO L87 Difference]: Start difference. First operand 200 states and 491 transitions. Second operand 18 states. [2019-12-27 04:39:47,037 WARN L192 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2019-12-27 04:39:47,972 WARN L192 SmtUtils]: Spent 791.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2019-12-27 04:39:48,848 WARN L192 SmtUtils]: Spent 842.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-27 04:39:50,050 WARN L192 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-27 04:39:50,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:50,534 INFO L93 Difference]: Finished difference Result 250 states and 585 transitions. [2019-12-27 04:39:50,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:39:50,536 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:50,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:50,539 INFO L225 Difference]: With dead ends: 250 [2019-12-27 04:39:50,539 INFO L226 Difference]: Without dead ends: 246 [2019-12-27 04:39:50,539 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=320, Invalid=671, Unknown=1, NotChecked=0, Total=992 [2019-12-27 04:39:50,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-12-27 04:39:50,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 199. [2019-12-27 04:39:50,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-12-27 04:39:50,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 486 transitions. [2019-12-27 04:39:50,544 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 486 transitions. Word has length 14 [2019-12-27 04:39:50,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:50,544 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 486 transitions. [2019-12-27 04:39:50,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:50,544 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 486 transitions. [2019-12-27 04:39:50,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:50,545 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:50,545 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:50,748 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:50,748 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:50,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:50,749 INFO L82 PathProgramCache]: Analyzing trace with hash 835071062, now seen corresponding path program 64 times [2019-12-27 04:39:50,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:50,749 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581126684] [2019-12-27 04:39:50,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:50,841 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 04:39:50,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581126684] [2019-12-27 04:39:50,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586441437] [2019-12-27 04:39:50,842 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 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 04:39:50,885 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:39:50,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:50,886 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:50,886 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:51,025 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 04:39:51,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:51,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:51,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802464027] [2019-12-27 04:39:51,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:51,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:51,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:51,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:51,027 INFO L87 Difference]: Start difference. First operand 199 states and 486 transitions. Second operand 18 states. [2019-12-27 04:39:51,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:51,577 INFO L93 Difference]: Finished difference Result 254 states and 594 transitions. [2019-12-27 04:39:51,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 04:39:51,577 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:51,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:51,580 INFO L225 Difference]: With dead ends: 254 [2019-12-27 04:39:51,580 INFO L226 Difference]: Without dead ends: 252 [2019-12-27 04:39:51,580 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=348, Invalid=774, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:39:51,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-12-27 04:39:51,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 208. [2019-12-27 04:39:51,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-27 04:39:51,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 522 transitions. [2019-12-27 04:39:51,587 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 522 transitions. Word has length 14 [2019-12-27 04:39:51,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:51,587 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 522 transitions. [2019-12-27 04:39:51,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:51,588 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 522 transitions. [2019-12-27 04:39:51,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:51,588 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:51,589 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:51,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:51,793 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:51,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:51,793 INFO L82 PathProgramCache]: Analyzing trace with hash 835070907, now seen corresponding path program 65 times [2019-12-27 04:39:51,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:51,794 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506736690] [2019-12-27 04:39:51,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:51,877 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 04:39:51,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506736690] [2019-12-27 04:39:51,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352685278] [2019-12-27 04:39:51,878 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 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 04:39:51,918 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:39:51,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:51,919 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:51,920 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:53,521 WARN L192 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 04:39:53,522 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 04:39:53,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:53,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:53,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013614936] [2019-12-27 04:39:53,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:53,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:53,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:53,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:39:53,523 INFO L87 Difference]: Start difference. First operand 208 states and 522 transitions. Second operand 18 states. [2019-12-27 04:39:54,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:54,918 INFO L93 Difference]: Finished difference Result 305 states and 704 transitions. [2019-12-27 04:39:54,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:39:54,918 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:54,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:54,921 INFO L225 Difference]: With dead ends: 305 [2019-12-27 04:39:54,921 INFO L226 Difference]: Without dead ends: 303 [2019-12-27 04:39:54,921 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=353, Invalid=768, Unknown=1, NotChecked=0, Total=1122 [2019-12-27 04:39:54,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2019-12-27 04:39:54,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 208. [2019-12-27 04:39:54,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-27 04:39:54,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 522 transitions. [2019-12-27 04:39:54,925 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 522 transitions. Word has length 14 [2019-12-27 04:39:54,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:54,926 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 522 transitions. [2019-12-27 04:39:54,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:54,926 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 522 transitions. [2019-12-27 04:39:54,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:54,926 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:54,926 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:55,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:55,127 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:55,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:55,127 INFO L82 PathProgramCache]: Analyzing trace with hash 835066257, now seen corresponding path program 66 times [2019-12-27 04:39:55,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:55,128 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612709967] [2019-12-27 04:39:55,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:55,226 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 04:39:55,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612709967] [2019-12-27 04:39:55,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239899021] [2019-12-27 04:39:55,227 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 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 04:39:55,271 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:39:55,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:39:55,272 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:55,275 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:39:57,332 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 04:39:57,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:39:57,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:39:57,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647232638] [2019-12-27 04:39:57,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:39:57,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:39:57,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:39:57,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=229, Unknown=3, NotChecked=0, Total=306 [2019-12-27 04:39:57,333 INFO L87 Difference]: Start difference. First operand 208 states and 522 transitions. Second operand 18 states. [2019-12-27 04:39:57,707 WARN L192 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-27 04:39:59,033 WARN L192 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-27 04:39:59,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:39:59,085 INFO L93 Difference]: Finished difference Result 308 states and 706 transitions. [2019-12-27 04:39:59,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:39:59,086 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:39:59,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:39:59,088 INFO L225 Difference]: With dead ends: 308 [2019-12-27 04:39:59,088 INFO L226 Difference]: Without dead ends: 307 [2019-12-27 04:39:59,089 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=350, Invalid=768, Unknown=4, NotChecked=0, Total=1122 [2019-12-27 04:39:59,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2019-12-27 04:39:59,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 209. [2019-12-27 04:39:59,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-12-27 04:39:59,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 526 transitions. [2019-12-27 04:39:59,093 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 526 transitions. Word has length 14 [2019-12-27 04:39:59,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:39:59,093 INFO L462 AbstractCegarLoop]: Abstraction has 209 states and 526 transitions. [2019-12-27 04:39:59,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:39:59,093 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 526 transitions. [2019-12-27 04:39:59,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:39:59,094 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:39:59,094 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:39:59,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:39:59,294 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:39:59,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:39:59,295 INFO L82 PathProgramCache]: Analyzing trace with hash 835066102, now seen corresponding path program 67 times [2019-12-27 04:39:59,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:39:59,296 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746645973] [2019-12-27 04:39:59,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:39:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:59,398 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 04:39:59,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746645973] [2019-12-27 04:39:59,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732158105] [2019-12-27 04:39:59,398 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 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 04:39:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:39:59,440 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:39:59,440 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:01,416 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 04:40:01,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:01,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:01,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709372656] [2019-12-27 04:40:01,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:01,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:01,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:01,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:40:01,417 INFO L87 Difference]: Start difference. First operand 209 states and 526 transitions. Second operand 18 states. [2019-12-27 04:40:03,881 WARN L192 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-27 04:40:05,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:05,883 INFO L93 Difference]: Finished difference Result 304 states and 702 transitions. [2019-12-27 04:40:05,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:40:05,884 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:05,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:05,886 INFO L225 Difference]: With dead ends: 304 [2019-12-27 04:40:05,886 INFO L226 Difference]: Without dead ends: 298 [2019-12-27 04:40:05,886 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=378, Invalid=808, Unknown=4, NotChecked=0, Total=1190 [2019-12-27 04:40:05,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2019-12-27 04:40:05,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 210. [2019-12-27 04:40:05,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 04:40:05,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 527 transitions. [2019-12-27 04:40:05,891 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 527 transitions. Word has length 14 [2019-12-27 04:40:05,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:05,891 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 527 transitions. [2019-12-27 04:40:05,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:05,891 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 527 transitions. [2019-12-27 04:40:05,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:05,892 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:05,892 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:06,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:06,093 INFO L410 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:06,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:06,093 INFO L82 PathProgramCache]: Analyzing trace with hash 834922107, now seen corresponding path program 68 times [2019-12-27 04:40:06,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:06,094 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419591100] [2019-12-27 04:40:06,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:06,199 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 04:40:06,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419591100] [2019-12-27 04:40:06,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340263496] [2019-12-27 04:40:06,199 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 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 04:40:06,240 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:40:06,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:06,241 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:06,242 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:09,155 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 04:40:09,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:09,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:09,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404098181] [2019-12-27 04:40:09,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:09,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:09,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:09,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:40:09,156 INFO L87 Difference]: Start difference. First operand 210 states and 527 transitions. Second operand 18 states. [2019-12-27 04:40:09,647 WARN L192 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2019-12-27 04:40:10,278 WARN L192 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-27 04:40:10,776 WARN L192 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2019-12-27 04:40:11,394 WARN L192 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2019-12-27 04:40:12,129 WARN L192 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-27 04:40:13,219 WARN L192 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-12-27 04:40:13,874 WARN L192 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-27 04:40:13,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:13,928 INFO L93 Difference]: Finished difference Result 301 states and 699 transitions. [2019-12-27 04:40:13,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:40:13,929 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:13,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:13,931 INFO L225 Difference]: With dead ends: 301 [2019-12-27 04:40:13,931 INFO L226 Difference]: Without dead ends: 300 [2019-12-27 04:40:13,931 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=310, Invalid=745, Unknown=1, NotChecked=0, Total=1056 [2019-12-27 04:40:13,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2019-12-27 04:40:13,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 211. [2019-12-27 04:40:13,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-12-27 04:40:13,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 531 transitions. [2019-12-27 04:40:13,936 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 531 transitions. Word has length 14 [2019-12-27 04:40:13,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:13,936 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 531 transitions. [2019-12-27 04:40:13,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 531 transitions. [2019-12-27 04:40:13,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:13,937 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:13,937 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:14,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:14,137 INFO L410 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:14,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:14,138 INFO L82 PathProgramCache]: Analyzing trace with hash 834921952, now seen corresponding path program 69 times [2019-12-27 04:40:14,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:14,139 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536910730] [2019-12-27 04:40:14,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:14,225 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 04:40:14,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536910730] [2019-12-27 04:40:14,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869216983] [2019-12-27 04:40:14,226 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 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 04:40:14,268 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:40:14,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:14,269 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:14,270 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:18,693 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 04:40:18,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:18,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:18,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666460181] [2019-12-27 04:40:18,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:18,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:18,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:18,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=225, Unknown=4, NotChecked=0, Total=306 [2019-12-27 04:40:18,695 INFO L87 Difference]: Start difference. First operand 211 states and 531 transitions. Second operand 18 states. [2019-12-27 04:40:19,556 WARN L192 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2019-12-27 04:40:21,068 WARN L192 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-27 04:40:21,979 WARN L192 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-27 04:40:22,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:22,011 INFO L93 Difference]: Finished difference Result 295 states and 691 transitions. [2019-12-27 04:40:22,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 04:40:22,011 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:22,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:22,014 INFO L225 Difference]: With dead ends: 295 [2019-12-27 04:40:22,014 INFO L226 Difference]: Without dead ends: 294 [2019-12-27 04:40:22,014 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=265, Invalid=600, Unknown=5, NotChecked=0, Total=870 [2019-12-27 04:40:22,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-12-27 04:40:22,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 210. [2019-12-27 04:40:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-12-27 04:40:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 527 transitions. [2019-12-27 04:40:22,018 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 527 transitions. Word has length 14 [2019-12-27 04:40:22,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:22,019 INFO L462 AbstractCegarLoop]: Abstraction has 210 states and 527 transitions. [2019-12-27 04:40:22,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:22,019 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 527 transitions. [2019-12-27 04:40:22,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:22,019 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:22,019 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:22,220 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:22,220 INFO L410 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:22,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:22,221 INFO L82 PathProgramCache]: Analyzing trace with hash 834917302, now seen corresponding path program 70 times [2019-12-27 04:40:22,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:22,222 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645873247] [2019-12-27 04:40:22,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:22,310 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 04:40:22,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645873247] [2019-12-27 04:40:22,311 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631071598] [2019-12-27 04:40:22,311 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 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 04:40:22,353 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:40:22,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:22,354 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:22,354 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:28,230 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 04:40:28,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:28,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:28,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241069521] [2019-12-27 04:40:28,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:28,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:28,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:28,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=229, Unknown=2, NotChecked=0, Total=306 [2019-12-27 04:40:28,232 INFO L87 Difference]: Start difference. First operand 210 states and 527 transitions. Second operand 18 states. [2019-12-27 04:40:30,908 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-27 04:40:31,350 WARN L192 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-12-27 04:40:34,320 WARN L192 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2019-12-27 04:40:36,942 WARN L192 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-12-27 04:40:43,043 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-27 04:40:43,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:43,143 INFO L93 Difference]: Finished difference Result 284 states and 665 transitions. [2019-12-27 04:40:43,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:40:43,144 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:43,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:43,146 INFO L225 Difference]: With dead ends: 284 [2019-12-27 04:40:43,146 INFO L226 Difference]: Without dead ends: 283 [2019-12-27 04:40:43,146 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=270, Invalid=654, Unknown=6, NotChecked=0, Total=930 [2019-12-27 04:40:43,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2019-12-27 04:40:43,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 208. [2019-12-27 04:40:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-27 04:40:43,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 521 transitions. [2019-12-27 04:40:43,151 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 521 transitions. Word has length 14 [2019-12-27 04:40:43,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:43,152 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 521 transitions. [2019-12-27 04:40:43,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:43,152 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 521 transitions. [2019-12-27 04:40:43,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:43,153 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:43,153 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:43,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:43,356 INFO L410 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:43,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:43,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086542, now seen corresponding path program 71 times [2019-12-27 04:40:43,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:43,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817324692] [2019-12-27 04:40:43,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:43,448 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 04:40:43,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817324692] [2019-12-27 04:40:43,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635479095] [2019-12-27 04:40:43,449 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 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 04:40:43,492 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:40:43,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:43,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:43,494 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:43,676 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 04:40:43,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:43,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:43,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728248977] [2019-12-27 04:40:43,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:43,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:43,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:43,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:40:43,678 INFO L87 Difference]: Start difference. First operand 208 states and 521 transitions. Second operand 18 states. [2019-12-27 04:40:44,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:44,419 INFO L93 Difference]: Finished difference Result 329 states and 757 transitions. [2019-12-27 04:40:44,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:40:44,419 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:44,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:44,422 INFO L225 Difference]: With dead ends: 329 [2019-12-27 04:40:44,422 INFO L226 Difference]: Without dead ends: 327 [2019-12-27 04:40:44,423 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:40:44,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2019-12-27 04:40:44,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 214. [2019-12-27 04:40:44,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-12-27 04:40:44,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 545 transitions. [2019-12-27 04:40:44,428 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 545 transitions. Word has length 14 [2019-12-27 04:40:44,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:44,428 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 545 transitions. [2019-12-27 04:40:44,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:44,428 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 545 transitions. [2019-12-27 04:40:44,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:44,429 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:44,429 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:44,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:44,632 INFO L410 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:44,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:44,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1837086387, now seen corresponding path program 72 times [2019-12-27 04:40:44,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:44,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564805000] [2019-12-27 04:40:44,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:44,755 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 04:40:44,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564805000] [2019-12-27 04:40:44,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792309860] [2019-12-27 04:40:44,756 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 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 04:40:44,812 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 04:40:44,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:44,812 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:44,813 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:44,994 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 04:40:44,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:44,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:44,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086383572] [2019-12-27 04:40:44,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:44,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:44,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:44,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:40:44,996 INFO L87 Difference]: Start difference. First operand 214 states and 545 transitions. Second operand 18 states. [2019-12-27 04:40:45,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:45,693 INFO L93 Difference]: Finished difference Result 318 states and 736 transitions. [2019-12-27 04:40:45,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:40:45,694 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:45,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:45,696 INFO L225 Difference]: With dead ends: 318 [2019-12-27 04:40:45,696 INFO L226 Difference]: Without dead ends: 316 [2019-12-27 04:40:45,697 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=344, Invalid=778, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:40:45,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2019-12-27 04:40:45,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 212. [2019-12-27 04:40:45,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-27 04:40:45,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 537 transitions. [2019-12-27 04:40:45,702 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 537 transitions. Word has length 14 [2019-12-27 04:40:45,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:45,703 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 537 transitions. [2019-12-27 04:40:45,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:45,703 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 537 transitions. [2019-12-27 04:40:45,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:45,703 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:45,704 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:45,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:45,907 INFO L410 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:45,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:45,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942392, now seen corresponding path program 73 times [2019-12-27 04:40:45,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:45,908 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838835155] [2019-12-27 04:40:45,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:46,000 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 04:40:46,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838835155] [2019-12-27 04:40:46,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389912343] [2019-12-27 04:40:46,001 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 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 04:40:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:46,041 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:46,042 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:46,264 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 04:40:46,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:46,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:46,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10929783] [2019-12-27 04:40:46,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:46,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:46,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:46,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:40:46,265 INFO L87 Difference]: Start difference. First operand 212 states and 537 transitions. Second operand 18 states. [2019-12-27 04:40:47,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:47,433 INFO L93 Difference]: Finished difference Result 328 states and 759 transitions. [2019-12-27 04:40:47,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:40:47,434 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:47,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:47,436 INFO L225 Difference]: With dead ends: 328 [2019-12-27 04:40:47,436 INFO L226 Difference]: Without dead ends: 326 [2019-12-27 04:40:47,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=289, Invalid=702, Unknown=1, NotChecked=0, Total=992 [2019-12-27 04:40:47,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-12-27 04:40:47,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 216. [2019-12-27 04:40:47,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 04:40:47,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 553 transitions. [2019-12-27 04:40:47,441 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 553 transitions. Word has length 14 [2019-12-27 04:40:47,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:47,441 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 553 transitions. [2019-12-27 04:40:47,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:47,441 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 553 transitions. [2019-12-27 04:40:47,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:47,442 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:47,442 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:47,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:47,643 INFO L410 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:47,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:47,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1836942237, now seen corresponding path program 74 times [2019-12-27 04:40:47,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:47,644 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724764883] [2019-12-27 04:40:47,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:47,733 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 04:40:47,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724764883] [2019-12-27 04:40:47,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356562656] [2019-12-27 04:40:47,734 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 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 04:40:47,776 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:40:47,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:47,777 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:47,777 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:40:47,988 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 04:40:47,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:40:47,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:40:47,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194906063] [2019-12-27 04:40:47,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:40:47,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:40:47,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:40:47,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:40:47,989 INFO L87 Difference]: Start difference. First operand 216 states and 553 transitions. Second operand 18 states. [2019-12-27 04:40:48,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:40:48,698 INFO L93 Difference]: Finished difference Result 349 states and 811 transitions. [2019-12-27 04:40:48,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:40:48,699 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:40:48,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:40:48,701 INFO L225 Difference]: With dead ends: 349 [2019-12-27 04:40:48,701 INFO L226 Difference]: Without dead ends: 347 [2019-12-27 04:40:48,701 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 04:40:48,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2019-12-27 04:40:48,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 217. [2019-12-27 04:40:48,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 04:40:48,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 557 transitions. [2019-12-27 04:40:48,705 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 557 transitions. Word has length 14 [2019-12-27 04:40:48,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:40:48,705 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 557 transitions. [2019-12-27 04:40:48,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:40:48,705 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 557 transitions. [2019-12-27 04:40:48,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:40:48,706 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:40:48,706 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:40:48,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:40:48,907 INFO L410 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:40:48,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:40:48,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1836937587, now seen corresponding path program 75 times [2019-12-27 04:40:48,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:40:48,908 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27942496] [2019-12-27 04:40:48,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:40:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:40:49,001 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 04:40:49,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27942496] [2019-12-27 04:40:49,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835420567] [2019-12-27 04:40:49,001 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 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 04:40:49,045 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 04:40:49,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:40:49,046 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:40:49,047 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:03,391 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 04:41:03,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:03,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:03,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418994736] [2019-12-27 04:41:03,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:03,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:03,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:03,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:41:03,393 INFO L87 Difference]: Start difference. First operand 217 states and 557 transitions. Second operand 18 states. [2019-12-27 04:41:05,654 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2019-12-27 04:41:15,038 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-12-27 04:41:15,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:15,180 INFO L93 Difference]: Finished difference Result 356 states and 822 transitions. [2019-12-27 04:41:15,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 04:41:15,181 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:15,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:15,184 INFO L225 Difference]: With dead ends: 356 [2019-12-27 04:41:15,184 INFO L226 Difference]: Without dead ends: 354 [2019-12-27 04:41:15,184 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=334, Invalid=787, Unknown=1, NotChecked=0, Total=1122 [2019-12-27 04:41:15,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2019-12-27 04:41:15,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 221. [2019-12-27 04:41:15,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-12-27 04:41:15,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 573 transitions. [2019-12-27 04:41:15,188 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 573 transitions. Word has length 14 [2019-12-27 04:41:15,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:15,189 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 573 transitions. [2019-12-27 04:41:15,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:15,189 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 573 transitions. [2019-12-27 04:41:15,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:15,189 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:15,189 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:15,390 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:15,390 INFO L410 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:15,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:15,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473742, now seen corresponding path program 76 times [2019-12-27 04:41:15,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:15,391 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035234934] [2019-12-27 04:41:15,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:15,477 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 04:41:15,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035234934] [2019-12-27 04:41:15,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139359293] [2019-12-27 04:41:15,478 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 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 04:41:15,535 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:41:15,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:15,536 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:15,537 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:15,830 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 04:41:15,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:15,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:15,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183725080] [2019-12-27 04:41:15,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:15,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:15,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:15,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:15,832 INFO L87 Difference]: Start difference. First operand 221 states and 573 transitions. Second operand 18 states. [2019-12-27 04:41:16,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:16,998 INFO L93 Difference]: Finished difference Result 303 states and 727 transitions. [2019-12-27 04:41:16,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 04:41:16,999 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:16,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:17,002 INFO L225 Difference]: With dead ends: 303 [2019-12-27 04:41:17,002 INFO L226 Difference]: Without dead ends: 302 [2019-12-27 04:41:17,002 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=415, Invalid=1067, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 04:41:17,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2019-12-27 04:41:17,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 222. [2019-12-27 04:41:17,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-27 04:41:17,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 577 transitions. [2019-12-27 04:41:17,006 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 577 transitions. Word has length 14 [2019-12-27 04:41:17,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:17,006 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 577 transitions. [2019-12-27 04:41:17,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:17,007 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 577 transitions. [2019-12-27 04:41:17,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:17,007 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:17,007 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:17,207 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:17,208 INFO L410 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:17,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:17,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1832473587, now seen corresponding path program 77 times [2019-12-27 04:41:17,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:17,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191516926] [2019-12-27 04:41:17,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:17,303 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 04:41:17,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191516926] [2019-12-27 04:41:17,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643312935] [2019-12-27 04:41:17,304 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 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 04:41:17,348 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:41:17,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:17,349 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:17,350 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:19,743 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 04:41:19,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:19,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:19,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26814414] [2019-12-27 04:41:19,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:19,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:19,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:19,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:19,745 INFO L87 Difference]: Start difference. First operand 222 states and 577 transitions. Second operand 18 states. [2019-12-27 04:41:20,456 WARN L192 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2019-12-27 04:41:21,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:21,824 INFO L93 Difference]: Finished difference Result 329 states and 791 transitions. [2019-12-27 04:41:21,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:41:21,825 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:21,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:21,827 INFO L225 Difference]: With dead ends: 329 [2019-12-27 04:41:21,828 INFO L226 Difference]: Without dead ends: 328 [2019-12-27 04:41:21,828 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2019-12-27 04:41:21,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2019-12-27 04:41:21,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 222. [2019-12-27 04:41:21,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-27 04:41:21,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 577 transitions. [2019-12-27 04:41:21,833 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 577 transitions. Word has length 14 [2019-12-27 04:41:21,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:21,834 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 577 transitions. [2019-12-27 04:41:21,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:21,841 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 577 transitions. [2019-12-27 04:41:21,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:21,842 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:21,842 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:22,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:22,046 INFO L410 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:22,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:22,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468937, now seen corresponding path program 78 times [2019-12-27 04:41:22,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:22,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067378990] [2019-12-27 04:41:22,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:22,175 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 04:41:22,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067378990] [2019-12-27 04:41:22,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733279288] [2019-12-27 04:41:22,175 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 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 04:41:22,218 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:41:22,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:22,220 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:22,221 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:22,466 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 04:41:22,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:22,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:22,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786171175] [2019-12-27 04:41:22,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:22,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:22,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:22,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:22,467 INFO L87 Difference]: Start difference. First operand 222 states and 577 transitions. Second operand 18 states. [2019-12-27 04:41:23,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:23,102 INFO L93 Difference]: Finished difference Result 330 states and 794 transitions. [2019-12-27 04:41:23,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:41:23,102 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:23,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:23,105 INFO L225 Difference]: With dead ends: 330 [2019-12-27 04:41:23,105 INFO L226 Difference]: Without dead ends: 329 [2019-12-27 04:41:23,106 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 04:41:23,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2019-12-27 04:41:23,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 222. [2019-12-27 04:41:23,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-27 04:41:23,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 577 transitions. [2019-12-27 04:41:23,110 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 577 transitions. Word has length 14 [2019-12-27 04:41:23,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:23,110 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 577 transitions. [2019-12-27 04:41:23,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:23,110 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 577 transitions. [2019-12-27 04:41:23,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:23,111 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:23,111 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:23,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:23,314 INFO L410 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:23,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:23,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1832468782, now seen corresponding path program 79 times [2019-12-27 04:41:23,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:23,315 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299492482] [2019-12-27 04:41:23,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:23,408 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 04:41:23,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299492482] [2019-12-27 04:41:23,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469103432] [2019-12-27 04:41:23,408 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 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 04:41:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:23,456 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:23,457 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:23,700 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 04:41:23,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:23,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:23,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133328050] [2019-12-27 04:41:23,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:23,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:23,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:23,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:23,701 INFO L87 Difference]: Start difference. First operand 222 states and 577 transitions. Second operand 18 states. [2019-12-27 04:41:24,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:24,542 INFO L93 Difference]: Finished difference Result 327 states and 770 transitions. [2019-12-27 04:41:24,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 04:41:24,542 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:24,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:24,545 INFO L225 Difference]: With dead ends: 327 [2019-12-27 04:41:24,545 INFO L226 Difference]: Without dead ends: 320 [2019-12-27 04:41:24,546 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=314, Invalid=742, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 04:41:24,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-12-27 04:41:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 220. [2019-12-27 04:41:24,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-12-27 04:41:24,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 566 transitions. [2019-12-27 04:41:24,553 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 566 transitions. Word has length 14 [2019-12-27 04:41:24,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:24,553 INFO L462 AbstractCegarLoop]: Abstraction has 220 states and 566 transitions. [2019-12-27 04:41:24,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:24,554 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 566 transitions. [2019-12-27 04:41:24,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:24,554 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:24,554 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:24,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:24,755 INFO L410 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:24,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:24,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1832324787, now seen corresponding path program 80 times [2019-12-27 04:41:24,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:24,756 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770011214] [2019-12-27 04:41:24,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:24,853 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 04:41:24,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770011214] [2019-12-27 04:41:24,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620211677] [2019-12-27 04:41:24,854 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 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 04:41:24,898 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:41:24,899 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:24,899 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:24,900 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:39,291 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 04:41:39,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:39,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:39,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680245276] [2019-12-27 04:41:39,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:39,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:39,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:39,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=230, Unknown=3, NotChecked=0, Total=306 [2019-12-27 04:41:39,292 INFO L87 Difference]: Start difference. First operand 220 states and 566 transitions. Second operand 18 states. [2019-12-27 04:41:41,492 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2019-12-27 04:41:44,201 WARN L192 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-12-27 04:41:44,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:44,382 INFO L93 Difference]: Finished difference Result 314 states and 743 transitions. [2019-12-27 04:41:44,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:41:44,383 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:44,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:44,385 INFO L225 Difference]: With dead ends: 314 [2019-12-27 04:41:44,385 INFO L226 Difference]: Without dead ends: 313 [2019-12-27 04:41:44,386 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=275, Invalid=714, Unknown=3, NotChecked=0, Total=992 [2019-12-27 04:41:44,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2019-12-27 04:41:44,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 217. [2019-12-27 04:41:44,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 04:41:44,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 556 transitions. [2019-12-27 04:41:44,391 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 556 transitions. Word has length 14 [2019-12-27 04:41:44,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:44,391 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 556 transitions. [2019-12-27 04:41:44,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:44,391 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 556 transitions. [2019-12-27 04:41:44,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:44,392 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:44,392 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:44,592 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:44,593 INFO L410 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:44,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:44,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018186, now seen corresponding path program 81 times [2019-12-27 04:41:44,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:44,594 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701002735] [2019-12-27 04:41:44,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:44,677 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 04:41:44,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701002735] [2019-12-27 04:41:44,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098357122] [2019-12-27 04:41:44,678 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 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 04:41:44,722 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 04:41:44,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:44,723 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:44,723 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:44,863 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 04:41:44,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:44,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:44,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57868109] [2019-12-27 04:41:44,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:44,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:44,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:44,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:44,864 INFO L87 Difference]: Start difference. First operand 217 states and 556 transitions. Second operand 18 states. [2019-12-27 04:41:45,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:45,209 INFO L93 Difference]: Finished difference Result 234 states and 578 transitions. [2019-12-27 04:41:45,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 04:41:45,209 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:45,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:45,211 INFO L225 Difference]: With dead ends: 234 [2019-12-27 04:41:45,211 INFO L226 Difference]: Without dead ends: 225 [2019-12-27 04:41:45,212 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=249, Invalid=681, Unknown=0, NotChecked=0, Total=930 [2019-12-27 04:41:45,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2019-12-27 04:41:45,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 219. [2019-12-27 04:41:45,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2019-12-27 04:41:45,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 555 transitions. [2019-12-27 04:41:45,216 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 555 transitions. Word has length 14 [2019-12-27 04:41:45,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:45,217 INFO L462 AbstractCegarLoop]: Abstraction has 219 states and 555 transitions. [2019-12-27 04:41:45,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:45,217 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 555 transitions. [2019-12-27 04:41:45,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:45,217 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:45,218 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:45,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:45,420 INFO L410 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:45,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:45,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1460018341, now seen corresponding path program 82 times [2019-12-27 04:41:45,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:45,421 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619912853] [2019-12-27 04:41:45,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:45,508 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 04:41:45,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619912853] [2019-12-27 04:41:45,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474666683] [2019-12-27 04:41:45,509 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 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 04:41:45,553 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:41:45,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:45,554 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:45,554 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:45,718 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 04:41:45,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:45,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:45,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772315456] [2019-12-27 04:41:45,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:45,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:45,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:45,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:45,720 INFO L87 Difference]: Start difference. First operand 219 states and 555 transitions. Second operand 18 states. [2019-12-27 04:41:46,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:46,331 INFO L93 Difference]: Finished difference Result 273 states and 656 transitions. [2019-12-27 04:41:46,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:41:46,331 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:46,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:46,333 INFO L225 Difference]: With dead ends: 273 [2019-12-27 04:41:46,334 INFO L226 Difference]: Without dead ends: 270 [2019-12-27 04:41:46,334 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 04:41:46,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2019-12-27 04:41:46,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 215. [2019-12-27 04:41:46,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-12-27 04:41:46,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 551 transitions. [2019-12-27 04:41:46,338 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 551 transitions. Word has length 14 [2019-12-27 04:41:46,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:46,338 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 551 transitions. [2019-12-27 04:41:46,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:46,338 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 551 transitions. [2019-12-27 04:41:46,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:46,339 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:46,339 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:46,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:46,542 INFO L410 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:46,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:46,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1460172101, now seen corresponding path program 83 times [2019-12-27 04:41:46,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:46,543 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103570098] [2019-12-27 04:41:46,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:46,678 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 04:41:46,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103570098] [2019-12-27 04:41:46,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591700002] [2019-12-27 04:41:46,678 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 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 04:41:46,721 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:41:46,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:46,722 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:46,723 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:46,856 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 04:41:46,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:46,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:46,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824428151] [2019-12-27 04:41:46,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:46,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:46,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:46,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:46,857 INFO L87 Difference]: Start difference. First operand 215 states and 551 transitions. Second operand 18 states. [2019-12-27 04:41:47,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:47,418 INFO L93 Difference]: Finished difference Result 299 states and 704 transitions. [2019-12-27 04:41:47,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:41:47,419 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:47,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:47,422 INFO L225 Difference]: With dead ends: 299 [2019-12-27 04:41:47,422 INFO L226 Difference]: Without dead ends: 297 [2019-12-27 04:41:47,422 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 04:41:47,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2019-12-27 04:41:47,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 213. [2019-12-27 04:41:47,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-12-27 04:41:47,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 555 transitions. [2019-12-27 04:41:47,427 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 555 transitions. Word has length 14 [2019-12-27 04:41:47,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:47,428 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 555 transitions. [2019-12-27 04:41:47,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:47,428 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 555 transitions. [2019-12-27 04:41:47,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:47,428 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:47,428 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:47,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:47,632 INFO L410 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:47,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635791, now seen corresponding path program 84 times [2019-12-27 04:41:47,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:47,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350189330] [2019-12-27 04:41:47,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:47,723 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 04:41:47,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350189330] [2019-12-27 04:41:47,724 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49280723] [2019-12-27 04:41:47,724 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 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 04:41:47,766 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:41:47,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:41:47,767 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:47,768 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:48,518 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 04:41:48,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:48,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:48,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018432024] [2019-12-27 04:41:48,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:48,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:48,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:48,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:48,520 INFO L87 Difference]: Start difference. First operand 213 states and 555 transitions. Second operand 18 states. [2019-12-27 04:41:49,423 WARN L192 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2019-12-27 04:41:49,860 WARN L192 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2019-12-27 04:41:51,139 WARN L192 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2019-12-27 04:41:51,789 WARN L192 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-27 04:41:52,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:41:52,484 INFO L93 Difference]: Finished difference Result 311 states and 731 transitions. [2019-12-27 04:41:52,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 04:41:52,485 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:41:52,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:41:52,488 INFO L225 Difference]: With dead ends: 311 [2019-12-27 04:41:52,488 INFO L226 Difference]: Without dead ends: 305 [2019-12-27 04:41:52,488 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=418, Invalid=1064, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 04:41:52,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2019-12-27 04:41:52,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 217. [2019-12-27 04:41:52,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-27 04:41:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 568 transitions. [2019-12-27 04:41:52,494 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 568 transitions. Word has length 14 [2019-12-27 04:41:52,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:41:52,494 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 568 transitions. [2019-12-27 04:41:52,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:41:52,494 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 568 transitions. [2019-12-27 04:41:52,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:41:52,495 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:41:52,495 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:41:52,697 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:41:52,698 INFO L410 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:41:52,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:41:52,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1464635946, now seen corresponding path program 85 times [2019-12-27 04:41:52,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:41:52,699 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148956339] [2019-12-27 04:41:52,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:41:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:52,850 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 04:41:52,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148956339] [2019-12-27 04:41:52,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098091892] [2019-12-27 04:41:52,851 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 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 04:41:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:41:52,895 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:41:52,895 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:41:53,934 WARN L192 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 04:41:56,386 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 04:41:56,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:41:56,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:41:56,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20367385] [2019-12-27 04:41:56,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:41:56,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:41:56,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:41:56,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:41:56,387 INFO L87 Difference]: Start difference. First operand 217 states and 568 transitions. Second operand 18 states. [2019-12-27 04:41:59,375 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2019-12-27 04:42:02,427 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2019-12-27 04:42:03,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:03,138 INFO L93 Difference]: Finished difference Result 329 states and 776 transitions. [2019-12-27 04:42:03,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:42:03,139 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:03,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:03,141 INFO L225 Difference]: With dead ends: 329 [2019-12-27 04:42:03,141 INFO L226 Difference]: Without dead ends: 327 [2019-12-27 04:42:03,142 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=342, Invalid=847, Unknown=1, NotChecked=0, Total=1190 [2019-12-27 04:42:03,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2019-12-27 04:42:03,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 215. [2019-12-27 04:42:03,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-12-27 04:42:03,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 561 transitions. [2019-12-27 04:42:03,147 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 561 transitions. Word has length 14 [2019-12-27 04:42:03,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:03,147 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 561 transitions. [2019-12-27 04:42:03,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:03,147 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 561 transitions. [2019-12-27 04:42:03,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:03,148 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:03,148 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:03,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:03,351 INFO L410 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:03,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:03,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640596, now seen corresponding path program 86 times [2019-12-27 04:42:03,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:03,352 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810333275] [2019-12-27 04:42:03,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:03,451 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 04:42:03,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810333275] [2019-12-27 04:42:03,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84480063] [2019-12-27 04:42:03,452 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 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 04:42:03,493 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:42:03,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:03,494 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:03,494 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:04,094 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_254 Int)) (and (<= (div (+ (* v_~i~0_254 (- 1)) 1) (- 2)) 2) (<= c_~j~0 (+ v_~i~0_254 c_~i~0 2)) (<= c_~i~0 (+ (* 2 v_~i~0_254) 2)))) is different from true [2019-12-27 04:42:04,603 WARN L192 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-27 04:42:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2019-12-27 04:42:04,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:04,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:04,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179248630] [2019-12-27 04:42:04,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:04,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:04,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:04,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=202, Unknown=1, NotChecked=30, Total=306 [2019-12-27 04:42:04,605 INFO L87 Difference]: Start difference. First operand 215 states and 561 transitions. Second operand 18 states. [2019-12-27 04:42:05,114 WARN L192 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2019-12-27 04:42:06,618 WARN L192 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-12-27 04:42:09,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:09,424 INFO L93 Difference]: Finished difference Result 368 states and 859 transitions. [2019-12-27 04:42:09,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 04:42:09,424 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:09,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:09,426 INFO L225 Difference]: With dead ends: 368 [2019-12-27 04:42:09,426 INFO L226 Difference]: Without dead ends: 366 [2019-12-27 04:42:09,426 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=304, Invalid=690, Unknown=2, NotChecked=60, Total=1056 [2019-12-27 04:42:09,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2019-12-27 04:42:09,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 226. [2019-12-27 04:42:09,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2019-12-27 04:42:09,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 605 transitions. [2019-12-27 04:42:09,431 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 605 transitions. Word has length 14 [2019-12-27 04:42:09,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:09,432 INFO L462 AbstractCegarLoop]: Abstraction has 226 states and 605 transitions. [2019-12-27 04:42:09,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:09,432 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 605 transitions. [2019-12-27 04:42:09,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:09,432 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:09,433 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:09,633 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:09,633 INFO L410 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:09,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:09,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1464640751, now seen corresponding path program 87 times [2019-12-27 04:42:09,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:09,634 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200495591] [2019-12-27 04:42:09,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:09,757 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 04:42:09,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200495591] [2019-12-27 04:42:09,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940042900] [2019-12-27 04:42:09,758 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 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 04:42:09,800 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:42:09,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:09,801 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:09,802 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:10,418 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_258 Int)) (and (<= c_~j~0 (+ v_~i~0_258 c_~i~0 2)) (<= c_~i~0 (+ (* 2 v_~i~0_258) 2)) (<= (div (+ (* v_~i~0_258 (- 1)) 1) (- 2)) 2))) is different from true [2019-12-27 04:42:10,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2019-12-27 04:42:10,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:10,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:10,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632763926] [2019-12-27 04:42:10,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:10,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:10,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:10,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=205, Unknown=1, NotChecked=30, Total=306 [2019-12-27 04:42:10,918 INFO L87 Difference]: Start difference. First operand 226 states and 605 transitions. Second operand 18 states. [2019-12-27 04:42:12,728 WARN L192 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2019-12-27 04:42:13,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:13,976 INFO L93 Difference]: Finished difference Result 355 states and 835 transitions. [2019-12-27 04:42:13,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:42:13,977 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:13,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:13,978 INFO L225 Difference]: With dead ends: 355 [2019-12-27 04:42:13,979 INFO L226 Difference]: Without dead ends: 353 [2019-12-27 04:42:13,979 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=315, Invalid=809, Unknown=2, NotChecked=64, Total=1190 [2019-12-27 04:42:13,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2019-12-27 04:42:13,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 224. [2019-12-27 04:42:13,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2019-12-27 04:42:13,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 598 transitions. [2019-12-27 04:42:13,984 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 598 transitions. Word has length 14 [2019-12-27 04:42:13,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:13,985 INFO L462 AbstractCegarLoop]: Abstraction has 224 states and 598 transitions. [2019-12-27 04:42:13,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:13,985 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 598 transitions. [2019-12-27 04:42:13,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:13,985 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:13,985 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:14,186 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:14,186 INFO L410 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:14,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:14,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784746, now seen corresponding path program 88 times [2019-12-27 04:42:14,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:14,187 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180334730] [2019-12-27 04:42:14,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:14,281 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 04:42:14,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180334730] [2019-12-27 04:42:14,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365312820] [2019-12-27 04:42:14,281 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 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 04:42:14,323 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:42:14,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:14,324 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:14,324 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:14,969 WARN L192 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 04:42:15,016 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 04:42:15,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:15,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:15,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942325642] [2019-12-27 04:42:15,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:15,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:15,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:15,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:15,017 INFO L87 Difference]: Start difference. First operand 224 states and 598 transitions. Second operand 18 states. [2019-12-27 04:42:17,635 WARN L192 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-12-27 04:42:17,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:17,736 INFO L93 Difference]: Finished difference Result 355 states and 833 transitions. [2019-12-27 04:42:17,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:42:17,737 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:17,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:17,738 INFO L225 Difference]: With dead ends: 355 [2019-12-27 04:42:17,738 INFO L226 Difference]: Without dead ends: 353 [2019-12-27 04:42:17,738 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=352, Invalid=838, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 04:42:17,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2019-12-27 04:42:17,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 227. [2019-12-27 04:42:17,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2019-12-27 04:42:17,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 610 transitions. [2019-12-27 04:42:17,743 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 610 transitions. Word has length 14 [2019-12-27 04:42:17,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:17,743 INFO L462 AbstractCegarLoop]: Abstraction has 227 states and 610 transitions. [2019-12-27 04:42:17,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:17,744 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 610 transitions. [2019-12-27 04:42:17,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:17,744 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:17,744 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:17,944 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:17,945 INFO L410 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:17,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:17,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1464784901, now seen corresponding path program 89 times [2019-12-27 04:42:17,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:17,946 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311234186] [2019-12-27 04:42:17,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:18,036 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 04:42:18,036 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311234186] [2019-12-27 04:42:18,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334999566] [2019-12-27 04:42:18,037 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 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 04:42:18,080 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 04:42:18,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:18,081 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:18,082 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:18,499 WARN L192 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 04:42:18,559 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 04:42:18,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:18,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:18,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123909917] [2019-12-27 04:42:18,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:18,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:18,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:18,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:18,561 INFO L87 Difference]: Start difference. First operand 227 states and 610 transitions. Second operand 18 states. [2019-12-27 04:42:19,191 WARN L192 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-12-27 04:42:19,932 WARN L192 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2019-12-27 04:42:21,147 WARN L192 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2019-12-27 04:42:21,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:21,324 INFO L93 Difference]: Finished difference Result 362 states and 858 transitions. [2019-12-27 04:42:21,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 04:42:21,324 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:21,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:21,326 INFO L225 Difference]: With dead ends: 362 [2019-12-27 04:42:21,326 INFO L226 Difference]: Without dead ends: 360 [2019-12-27 04:42:21,326 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=410, Invalid=921, Unknown=1, NotChecked=0, Total=1332 [2019-12-27 04:42:21,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2019-12-27 04:42:21,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 225. [2019-12-27 04:42:21,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2019-12-27 04:42:21,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 602 transitions. [2019-12-27 04:42:21,334 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 602 transitions. Word has length 14 [2019-12-27 04:42:21,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:21,334 INFO L462 AbstractCegarLoop]: Abstraction has 225 states and 602 transitions. [2019-12-27 04:42:21,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:21,335 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 602 transitions. [2019-12-27 04:42:21,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:21,335 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:21,335 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:21,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:21,539 INFO L410 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:21,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:21,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1603163941, now seen corresponding path program 90 times [2019-12-27 04:42:21,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:21,540 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591082817] [2019-12-27 04:42:21,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:21,624 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 04:42:21,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591082817] [2019-12-27 04:42:21,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193894610] [2019-12-27 04:42:21,624 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 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 04:42:21,666 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:42:21,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:21,667 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:21,668 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:21,792 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 04:42:21,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:21,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:21,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720171993] [2019-12-27 04:42:21,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:21,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:21,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:21,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:21,794 INFO L87 Difference]: Start difference. First operand 225 states and 602 transitions. Second operand 18 states. [2019-12-27 04:42:22,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:22,401 INFO L93 Difference]: Finished difference Result 315 states and 749 transitions. [2019-12-27 04:42:22,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 04:42:22,402 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:22,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:22,403 INFO L225 Difference]: With dead ends: 315 [2019-12-27 04:42:22,403 INFO L226 Difference]: Without dead ends: 303 [2019-12-27 04:42:22,404 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=450, Invalid=1190, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 04:42:22,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2019-12-27 04:42:22,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 228. [2019-12-27 04:42:22,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2019-12-27 04:42:22,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 606 transitions. [2019-12-27 04:42:22,409 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 606 transitions. Word has length 14 [2019-12-27 04:42:22,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:22,409 INFO L462 AbstractCegarLoop]: Abstraction has 228 states and 606 transitions. [2019-12-27 04:42:22,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:22,409 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 606 transitions. [2019-12-27 04:42:22,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:22,410 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:22,410 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:22,613 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:22,613 INFO L410 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:22,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:22,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1603164096, now seen corresponding path program 91 times [2019-12-27 04:42:22,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:22,614 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27473332] [2019-12-27 04:42:22,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:22,702 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 04:42:22,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27473332] [2019-12-27 04:42:22,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150180072] [2019-12-27 04:42:22,702 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 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 04:42:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:22,749 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:22,750 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:22,892 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 04:42:22,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:22,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:22,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532043293] [2019-12-27 04:42:22,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:22,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:22,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:22,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:22,894 INFO L87 Difference]: Start difference. First operand 228 states and 606 transitions. Second operand 18 states. [2019-12-27 04:42:23,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:23,520 INFO L93 Difference]: Finished difference Result 357 states and 834 transitions. [2019-12-27 04:42:23,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 04:42:23,520 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:23,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:23,522 INFO L225 Difference]: With dead ends: 357 [2019-12-27 04:42:23,522 INFO L226 Difference]: Without dead ends: 355 [2019-12-27 04:42:23,522 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 04:42:23,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2019-12-27 04:42:23,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 227. [2019-12-27 04:42:23,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2019-12-27 04:42:23,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 603 transitions. [2019-12-27 04:42:23,527 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 603 transitions. Word has length 14 [2019-12-27 04:42:23,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:23,528 INFO L462 AbstractCegarLoop]: Abstraction has 227 states and 603 transitions. [2019-12-27 04:42:23,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:23,528 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 603 transitions. [2019-12-27 04:42:23,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:23,528 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:23,529 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:23,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:23,732 INFO L410 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:23,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:23,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1603168901, now seen corresponding path program 92 times [2019-12-27 04:42:23,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:23,733 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53665192] [2019-12-27 04:42:23,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:23,857 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 04:42:23,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53665192] [2019-12-27 04:42:23,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937221436] [2019-12-27 04:42:23,858 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 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 04:42:23,900 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:42:23,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:23,901 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:23,902 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:24,029 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 04:42:24,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:24,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:24,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218005454] [2019-12-27 04:42:24,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:24,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:24,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:24,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:24,030 INFO L87 Difference]: Start difference. First operand 227 states and 603 transitions. Second operand 18 states. [2019-12-27 04:42:24,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:24,672 INFO L93 Difference]: Finished difference Result 365 states and 856 transitions. [2019-12-27 04:42:24,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 04:42:24,672 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:24,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:24,674 INFO L225 Difference]: With dead ends: 365 [2019-12-27 04:42:24,674 INFO L226 Difference]: Without dead ends: 363 [2019-12-27 04:42:24,674 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 04:42:24,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2019-12-27 04:42:24,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 227. [2019-12-27 04:42:24,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2019-12-27 04:42:24,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 604 transitions. [2019-12-27 04:42:24,678 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 604 transitions. Word has length 14 [2019-12-27 04:42:24,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:24,678 INFO L462 AbstractCegarLoop]: Abstraction has 227 states and 604 transitions. [2019-12-27 04:42:24,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:24,678 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 604 transitions. [2019-12-27 04:42:24,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:24,679 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:24,679 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:24,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:24,879 INFO L410 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:24,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:24,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1603312896, now seen corresponding path program 93 times [2019-12-27 04:42:24,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:24,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031616018] [2019-12-27 04:42:24,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:24,971 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 04:42:24,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031616018] [2019-12-27 04:42:24,972 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778638624] [2019-12-27 04:42:24,972 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 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 04:42:25,015 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:42:25,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:25,016 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:25,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:25,140 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 04:42:25,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:25,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:25,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828304553] [2019-12-27 04:42:25,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:25,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:25,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:25,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:25,142 INFO L87 Difference]: Start difference. First operand 227 states and 604 transitions. Second operand 18 states. [2019-12-27 04:42:25,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:25,622 INFO L93 Difference]: Finished difference Result 366 states and 847 transitions. [2019-12-27 04:42:25,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 04:42:25,622 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:25,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:25,623 INFO L225 Difference]: With dead ends: 366 [2019-12-27 04:42:25,624 INFO L226 Difference]: Without dead ends: 364 [2019-12-27 04:42:25,624 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 04:42:25,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2019-12-27 04:42:25,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 229. [2019-12-27 04:42:25,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2019-12-27 04:42:25,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 612 transitions. [2019-12-27 04:42:25,629 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 612 transitions. Word has length 14 [2019-12-27 04:42:25,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:25,629 INFO L462 AbstractCegarLoop]: Abstraction has 229 states and 612 transitions. [2019-12-27 04:42:25,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:25,629 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 612 transitions. [2019-12-27 04:42:25,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:25,629 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:25,629 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:25,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:25,830 INFO L410 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:25,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:25,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1603313051, now seen corresponding path program 94 times [2019-12-27 04:42:25,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:25,831 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629686126] [2019-12-27 04:42:25,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:25,932 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 04:42:25,933 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629686126] [2019-12-27 04:42:25,933 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754779521] [2019-12-27 04:42:25,933 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 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 04:42:25,976 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:42:25,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:25,976 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:25,977 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:26,093 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 04:42:26,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:26,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:26,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197038119] [2019-12-27 04:42:26,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:26,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:26,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:26,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:26,095 INFO L87 Difference]: Start difference. First operand 229 states and 612 transitions. Second operand 18 states. [2019-12-27 04:42:26,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:26,470 INFO L93 Difference]: Finished difference Result 366 states and 862 transitions. [2019-12-27 04:42:26,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:42:26,470 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:26,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:26,472 INFO L225 Difference]: With dead ends: 366 [2019-12-27 04:42:26,472 INFO L226 Difference]: Without dead ends: 364 [2019-12-27 04:42:26,472 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 04:42:26,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2019-12-27 04:42:26,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 227. [2019-12-27 04:42:26,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2019-12-27 04:42:26,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 604 transitions. [2019-12-27 04:42:26,477 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 604 transitions. Word has length 14 [2019-12-27 04:42:26,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:26,477 INFO L462 AbstractCegarLoop]: Abstraction has 227 states and 604 transitions. [2019-12-27 04:42:26,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:26,477 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 604 transitions. [2019-12-27 04:42:26,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:26,477 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:26,477 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:26,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:26,678 INFO L410 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:26,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:26,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1603317701, now seen corresponding path program 95 times [2019-12-27 04:42:26,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:26,679 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409984204] [2019-12-27 04:42:26,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:26,769 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 04:42:26,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409984204] [2019-12-27 04:42:26,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506014457] [2019-12-27 04:42:26,769 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 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 04:42:26,813 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:42:26,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:26,814 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:26,814 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:26,945 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 04:42:26,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:26,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:26,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655796384] [2019-12-27 04:42:26,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:26,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:26,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:26,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:26,947 INFO L87 Difference]: Start difference. First operand 227 states and 604 transitions. Second operand 18 states. [2019-12-27 04:42:27,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:27,457 INFO L93 Difference]: Finished difference Result 367 states and 855 transitions. [2019-12-27 04:42:27,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:42:27,458 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:27,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:27,459 INFO L225 Difference]: With dead ends: 367 [2019-12-27 04:42:27,459 INFO L226 Difference]: Without dead ends: 365 [2019-12-27 04:42:27,459 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 04:42:27,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2019-12-27 04:42:27,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 228. [2019-12-27 04:42:27,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2019-12-27 04:42:27,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 608 transitions. [2019-12-27 04:42:27,463 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 608 transitions. Word has length 14 [2019-12-27 04:42:27,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:27,463 INFO L462 AbstractCegarLoop]: Abstraction has 228 states and 608 transitions. [2019-12-27 04:42:27,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:27,463 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 608 transitions. [2019-12-27 04:42:27,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:27,464 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:27,464 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:27,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:27,664 INFO L410 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:27,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:27,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1607781701, now seen corresponding path program 96 times [2019-12-27 04:42:27,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:27,666 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802861348] [2019-12-27 04:42:27,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:27,754 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 04:42:27,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802861348] [2019-12-27 04:42:27,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526689366] [2019-12-27 04:42:27,754 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 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 04:42:27,798 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 04:42:27,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:27,799 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:27,800 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:29,744 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 04:42:29,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:29,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:29,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137008669] [2019-12-27 04:42:29,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:29,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:29,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:29,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:42:29,746 INFO L87 Difference]: Start difference. First operand 228 states and 608 transitions. Second operand 18 states. [2019-12-27 04:42:31,179 WARN L192 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2019-12-27 04:42:32,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:32,039 INFO L93 Difference]: Finished difference Result 349 states and 821 transitions. [2019-12-27 04:42:32,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:42:32,039 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:32,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:32,041 INFO L225 Difference]: With dead ends: 349 [2019-12-27 04:42:32,041 INFO L226 Difference]: Without dead ends: 347 [2019-12-27 04:42:32,041 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=349, Invalid=840, Unknown=1, NotChecked=0, Total=1190 [2019-12-27 04:42:32,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2019-12-27 04:42:32,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 225. [2019-12-27 04:42:32,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2019-12-27 04:42:32,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 596 transitions. [2019-12-27 04:42:32,046 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 596 transitions. Word has length 14 [2019-12-27 04:42:32,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:32,046 INFO L462 AbstractCegarLoop]: Abstraction has 225 states and 596 transitions. [2019-12-27 04:42:32,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:32,046 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 596 transitions. [2019-12-27 04:42:32,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:32,047 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:32,047 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:32,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:32,247 INFO L410 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:32,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:32,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1607935461, now seen corresponding path program 97 times [2019-12-27 04:42:32,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:32,249 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514354546] [2019-12-27 04:42:32,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:32,327 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 04:42:32,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514354546] [2019-12-27 04:42:32,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761442413] [2019-12-27 04:42:32,328 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 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 04:42:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:32,365 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:32,365 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:32,503 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 04:42:32,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:32,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:32,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855502854] [2019-12-27 04:42:32,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:32,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:32,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:32,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:32,505 INFO L87 Difference]: Start difference. First operand 225 states and 596 transitions. Second operand 18 states. [2019-12-27 04:42:32,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:32,978 INFO L93 Difference]: Finished difference Result 262 states and 637 transitions. [2019-12-27 04:42:32,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:42:32,979 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:32,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:32,980 INFO L225 Difference]: With dead ends: 262 [2019-12-27 04:42:32,980 INFO L226 Difference]: Without dead ends: 244 [2019-12-27 04:42:32,981 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=917, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 04:42:32,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-12-27 04:42:32,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 218. [2019-12-27 04:42:32,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-27 04:42:32,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 562 transitions. [2019-12-27 04:42:32,986 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 562 transitions. Word has length 14 [2019-12-27 04:42:32,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:32,986 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 562 transitions. [2019-12-27 04:42:32,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:32,986 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 562 transitions. [2019-12-27 04:42:32,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:32,987 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:32,987 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:33,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:33,190 INFO L410 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:33,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:33,190 INFO L82 PathProgramCache]: Analyzing trace with hash -591203410, now seen corresponding path program 98 times [2019-12-27 04:42:33,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:33,191 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918727367] [2019-12-27 04:42:33,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:33,345 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 04:42:33,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918727367] [2019-12-27 04:42:33,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577271557] [2019-12-27 04:42:33,346 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 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 04:42:33,415 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:42:33,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:33,417 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:33,418 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:34,183 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_297 Int)) (and (<= c_~i~0 (+ c_~j~0 v_~i~0_297)) (<= c_~j~0 (+ v_~i~0_297 1)) (<= (div (+ (* v_~i~0_297 (- 1)) 1) (- 5)) 1))) is different from true [2019-12-27 04:42:34,184 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 04:42:34,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:34,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:34,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305303594] [2019-12-27 04:42:34,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:34,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:34,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:34,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=207, Unknown=1, NotChecked=30, Total=306 [2019-12-27 04:42:34,185 INFO L87 Difference]: Start difference. First operand 218 states and 562 transitions. Second operand 18 states. [2019-12-27 04:42:37,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:37,632 INFO L93 Difference]: Finished difference Result 256 states and 623 transitions. [2019-12-27 04:42:37,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 04:42:37,633 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:37,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:37,634 INFO L225 Difference]: With dead ends: 256 [2019-12-27 04:42:37,634 INFO L226 Difference]: Without dead ends: 252 [2019-12-27 04:42:37,634 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=267, Invalid=604, Unknown=3, NotChecked=56, Total=930 [2019-12-27 04:42:37,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-12-27 04:42:37,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 219. [2019-12-27 04:42:37,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2019-12-27 04:42:37,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 565 transitions. [2019-12-27 04:42:37,638 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 565 transitions. Word has length 14 [2019-12-27 04:42:37,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:37,639 INFO L462 AbstractCegarLoop]: Abstraction has 219 states and 565 transitions. [2019-12-27 04:42:37,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:37,639 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 565 transitions. [2019-12-27 04:42:37,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:37,639 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:37,639 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:37,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:37,843 INFO L410 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:37,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:37,843 INFO L82 PathProgramCache]: Analyzing trace with hash -591203565, now seen corresponding path program 99 times [2019-12-27 04:42:37,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:37,843 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620133611] [2019-12-27 04:42:37,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:37,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:37,933 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 04:42:37,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620133611] [2019-12-27 04:42:37,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855837347] [2019-12-27 04:42:37,934 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 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 04:42:37,974 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:42:37,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:37,975 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 04:42:37,976 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:38,102 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 04:42:38,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:38,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:38,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122173275] [2019-12-27 04:42:38,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:38,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:38,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:38,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:38,104 INFO L87 Difference]: Start difference. First operand 219 states and 565 transitions. Second operand 18 states. [2019-12-27 04:42:38,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:38,397 INFO L93 Difference]: Finished difference Result 264 states and 637 transitions. [2019-12-27 04:42:38,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 04:42:38,398 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:38,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:38,399 INFO L225 Difference]: With dead ends: 264 [2019-12-27 04:42:38,399 INFO L226 Difference]: Without dead ends: 263 [2019-12-27 04:42:38,399 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2019-12-27 04:42:38,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2019-12-27 04:42:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 222. [2019-12-27 04:42:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-12-27 04:42:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 566 transitions. [2019-12-27 04:42:38,403 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 566 transitions. Word has length 14 [2019-12-27 04:42:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:38,403 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 566 transitions. [2019-12-27 04:42:38,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:38,403 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 566 transitions. [2019-12-27 04:42:38,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:38,404 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:38,404 INFO L411 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:38,604 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:38,604 INFO L410 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:38,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:38,605 INFO L82 PathProgramCache]: Analyzing trace with hash -591347560, now seen corresponding path program 100 times [2019-12-27 04:42:38,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:38,605 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464344741] [2019-12-27 04:42:38,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:38,689 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 04:42:38,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464344741] [2019-12-27 04:42:38,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590611256] [2019-12-27 04:42:38,690 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 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 04:42:38,734 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:42:38,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:38,735 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:38,735 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:41,361 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 04:42:41,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:41,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:41,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457062278] [2019-12-27 04:42:41,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:41,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:41,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:41,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=230, Unknown=2, NotChecked=0, Total=306 [2019-12-27 04:42:41,363 INFO L87 Difference]: Start difference. First operand 222 states and 566 transitions. Second operand 18 states. [2019-12-27 04:42:41,830 WARN L192 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2019-12-27 04:42:42,427 WARN L192 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2019-12-27 04:42:43,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:43,251 INFO L93 Difference]: Finished difference Result 250 states and 608 transitions. [2019-12-27 04:42:43,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 04:42:43,252 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:43,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:43,253 INFO L225 Difference]: With dead ends: 250 [2019-12-27 04:42:43,253 INFO L226 Difference]: Without dead ends: 246 [2019-12-27 04:42:43,253 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=312, Invalid=678, Unknown=2, NotChecked=0, Total=992 [2019-12-27 04:42:43,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2019-12-27 04:42:43,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 218. [2019-12-27 04:42:43,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-12-27 04:42:43,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 552 transitions. [2019-12-27 04:42:43,257 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 552 transitions. Word has length 14 [2019-12-27 04:42:43,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:43,257 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 552 transitions. [2019-12-27 04:42:43,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:43,257 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 552 transitions. [2019-12-27 04:42:43,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:43,258 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:43,258 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:43,458 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:43,458 INFO L410 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:43,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:43,459 INFO L82 PathProgramCache]: Analyzing trace with hash -591347715, now seen corresponding path program 101 times [2019-12-27 04:42:43,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:43,460 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703453498] [2019-12-27 04:42:43,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:43,542 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 04:42:43,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703453498] [2019-12-27 04:42:43,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755616919] [2019-12-27 04:42:43,542 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 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 04:42:43,585 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:42:43,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:43,586 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:43,587 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:44,710 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 04:42:44,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:44,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:44,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399666671] [2019-12-27 04:42:44,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:44,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:44,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:44,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:44,711 INFO L87 Difference]: Start difference. First operand 218 states and 552 transitions. Second operand 18 states. [2019-12-27 04:42:45,318 WARN L192 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2019-12-27 04:42:47,924 WARN L192 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2019-12-27 04:42:48,051 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-12-27 04:42:50,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:50,852 INFO L93 Difference]: Finished difference Result 282 states and 667 transitions. [2019-12-27 04:42:50,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:42:50,853 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:50,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:50,854 INFO L225 Difference]: With dead ends: 282 [2019-12-27 04:42:50,854 INFO L226 Difference]: Without dead ends: 281 [2019-12-27 04:42:50,854 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=307, Invalid=685, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:42:50,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-12-27 04:42:50,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 216. [2019-12-27 04:42:50,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 04:42:50,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 546 transitions. [2019-12-27 04:42:50,858 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 546 transitions. Word has length 14 [2019-12-27 04:42:50,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:50,858 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 546 transitions. [2019-12-27 04:42:50,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:50,858 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 546 transitions. [2019-12-27 04:42:50,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:50,859 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:50,859 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:51,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:51,060 INFO L410 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:51,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:51,060 INFO L82 PathProgramCache]: Analyzing trace with hash -591352365, now seen corresponding path program 102 times [2019-12-27 04:42:51,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:51,061 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284432957] [2019-12-27 04:42:51,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:51,160 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 04:42:51,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284432957] [2019-12-27 04:42:51,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596017257] [2019-12-27 04:42:51,161 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 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 04:42:51,202 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-12-27 04:42:51,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:51,202 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:51,203 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:51,365 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 04:42:51,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:51,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:51,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143210131] [2019-12-27 04:42:51,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:51,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:51,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:51,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:51,367 INFO L87 Difference]: Start difference. First operand 216 states and 546 transitions. Second operand 18 states. [2019-12-27 04:42:52,414 WARN L192 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-27 04:42:52,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:52,479 INFO L93 Difference]: Finished difference Result 272 states and 644 transitions. [2019-12-27 04:42:52,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 04:42:52,480 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:52,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:52,481 INFO L225 Difference]: With dead ends: 272 [2019-12-27 04:42:52,481 INFO L226 Difference]: Without dead ends: 271 [2019-12-27 04:42:52,481 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-12-27 04:42:52,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-12-27 04:42:52,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 216. [2019-12-27 04:42:52,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-27 04:42:52,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 546 transitions. [2019-12-27 04:42:52,486 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 546 transitions. Word has length 14 [2019-12-27 04:42:52,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:52,486 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 546 transitions. [2019-12-27 04:42:52,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:52,486 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 546 transitions. [2019-12-27 04:42:52,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:52,486 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:52,487 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:52,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:52,690 INFO L410 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:52,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:52,691 INFO L82 PathProgramCache]: Analyzing trace with hash -595969970, now seen corresponding path program 103 times [2019-12-27 04:42:52,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:52,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654114235] [2019-12-27 04:42:52,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:52,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:52,798 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 04:42:52,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654114235] [2019-12-27 04:42:52,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208764194] [2019-12-27 04:42:52,799 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 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 04:42:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:52,842 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:52,842 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:53,404 WARN L192 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-27 04:42:53,405 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 04:42:53,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:53,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:53,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567550727] [2019-12-27 04:42:53,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:53,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:53,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:53,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:53,406 INFO L87 Difference]: Start difference. First operand 216 states and 546 transitions. Second operand 18 states. [2019-12-27 04:42:54,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:54,314 INFO L93 Difference]: Finished difference Result 295 states and 687 transitions. [2019-12-27 04:42:54,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 04:42:54,315 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:54,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:54,316 INFO L225 Difference]: With dead ends: 295 [2019-12-27 04:42:54,316 INFO L226 Difference]: Without dead ends: 293 [2019-12-27 04:42:54,317 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=353, Invalid=769, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 04:42:54,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2019-12-27 04:42:54,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 212. [2019-12-27 04:42:54,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-12-27 04:42:54,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 531 transitions. [2019-12-27 04:42:54,321 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 531 transitions. Word has length 14 [2019-12-27 04:42:54,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:54,321 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 531 transitions. [2019-12-27 04:42:54,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:54,321 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 531 transitions. [2019-12-27 04:42:54,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:54,322 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:54,322 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:54,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:54,525 INFO L410 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:54,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:54,525 INFO L82 PathProgramCache]: Analyzing trace with hash -734498275, now seen corresponding path program 104 times [2019-12-27 04:42:54,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:54,526 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821070769] [2019-12-27 04:42:54,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:54,613 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 04:42:54,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821070769] [2019-12-27 04:42:54,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956656584] [2019-12-27 04:42:54,614 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 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 04:42:54,653 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:42:54,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:54,660 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:54,661 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:54,891 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 04:42:54,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:54,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:54,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606656035] [2019-12-27 04:42:54,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:54,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:54,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:54,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:42:54,893 INFO L87 Difference]: Start difference. First operand 212 states and 531 transitions. Second operand 18 states. [2019-12-27 04:42:55,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:42:55,979 INFO L93 Difference]: Finished difference Result 286 states and 664 transitions. [2019-12-27 04:42:55,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 04:42:55,980 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:42:55,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:42:55,981 INFO L225 Difference]: With dead ends: 286 [2019-12-27 04:42:55,981 INFO L226 Difference]: Without dead ends: 285 [2019-12-27 04:42:55,981 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 04:42:55,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2019-12-27 04:42:55,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 208. [2019-12-27 04:42:55,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-12-27 04:42:55,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 517 transitions. [2019-12-27 04:42:55,985 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 517 transitions. Word has length 14 [2019-12-27 04:42:55,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:42:55,985 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 517 transitions. [2019-12-27 04:42:55,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:42:55,985 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 517 transitions. [2019-12-27 04:42:55,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:42:55,985 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:42:55,986 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:42:56,186 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:42:56,186 INFO L410 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:42:56,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:42:56,187 INFO L82 PathProgramCache]: Analyzing trace with hash -733754519, now seen corresponding path program 105 times [2019-12-27 04:42:56,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:42:56,187 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765685022] [2019-12-27 04:42:56,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:42:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:42:56,280 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 04:42:56,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765685022] [2019-12-27 04:42:56,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432715639] [2019-12-27 04:42:56,281 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 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 04:42:56,324 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-27 04:42:56,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:42:56,325 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:42:56,326 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:42:57,025 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 04:42:57,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:42:57,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:42:57,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78971100] [2019-12-27 04:42:57,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:42:57,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:42:57,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:42:57,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2019-12-27 04:42:57,026 INFO L87 Difference]: Start difference. First operand 208 states and 517 transitions. Second operand 18 states. [2019-12-27 04:42:59,066 WARN L192 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2019-12-27 04:43:00,107 WARN L192 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-27 04:43:00,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:43:00,172 INFO L93 Difference]: Finished difference Result 305 states and 697 transitions. [2019-12-27 04:43:00,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 04:43:00,173 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:43:00,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:43:00,174 INFO L225 Difference]: With dead ends: 305 [2019-12-27 04:43:00,174 INFO L226 Difference]: Without dead ends: 304 [2019-12-27 04:43:00,174 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=363, Invalid=893, Unknown=4, NotChecked=0, Total=1260 [2019-12-27 04:43:00,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2019-12-27 04:43:00,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 205. [2019-12-27 04:43:00,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-12-27 04:43:00,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 507 transitions. [2019-12-27 04:43:00,178 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 507 transitions. Word has length 14 [2019-12-27 04:43:00,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:43:00,178 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 507 transitions. [2019-12-27 04:43:00,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:43:00,179 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 507 transitions. [2019-12-27 04:43:00,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:43:00,179 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:43:00,179 INFO L411 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:43:00,383 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:43:00,383 INFO L410 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:43:00,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:43:00,384 INFO L82 PathProgramCache]: Analyzing trace with hash -738367319, now seen corresponding path program 106 times [2019-12-27 04:43:00,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:43:00,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530993559] [2019-12-27 04:43:00,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:43:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:43:00,483 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 04:43:00,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530993559] [2019-12-27 04:43:00,484 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252925521] [2019-12-27 04:43:00,484 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 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 04:43:00,526 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 04:43:00,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:43:00,527 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:43:00,527 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:43:00,654 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 04:43:00,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:43:00,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:43:00,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284546196] [2019-12-27 04:43:00,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:43:00,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:43:00,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:43:00,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:43:00,655 INFO L87 Difference]: Start difference. First operand 205 states and 507 transitions. Second operand 18 states. [2019-12-27 04:43:01,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:43:01,141 INFO L93 Difference]: Finished difference Result 294 states and 669 transitions. [2019-12-27 04:43:01,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 04:43:01,141 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:43:01,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:43:01,142 INFO L225 Difference]: With dead ends: 294 [2019-12-27 04:43:01,143 INFO L226 Difference]: Without dead ends: 292 [2019-12-27 04:43:01,143 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 04:43:01,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2019-12-27 04:43:01,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 203. [2019-12-27 04:43:01,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-12-27 04:43:01,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 498 transitions. [2019-12-27 04:43:01,147 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 498 transitions. Word has length 14 [2019-12-27 04:43:01,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:43:01,147 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 498 transitions. [2019-12-27 04:43:01,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:43:01,147 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 498 transitions. [2019-12-27 04:43:01,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:43:01,148 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:43:01,148 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:43:01,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:43:01,351 INFO L410 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:43:01,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:43:01,351 INFO L82 PathProgramCache]: Analyzing trace with hash -738367474, now seen corresponding path program 107 times [2019-12-27 04:43:01,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:43:01,352 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436985036] [2019-12-27 04:43:01,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:43:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:43:01,440 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 04:43:01,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436985036] [2019-12-27 04:43:01,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617450673] [2019-12-27 04:43:01,441 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 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 04:43:01,484 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-27 04:43:01,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:43:01,485 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:43:01,486 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:43:01,614 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 04:43:01,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:43:01,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:43:01,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014552758] [2019-12-27 04:43:01,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:43:01,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:43:01,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:43:01,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:43:01,616 INFO L87 Difference]: Start difference. First operand 203 states and 498 transitions. Second operand 18 states. [2019-12-27 04:43:02,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:43:02,139 INFO L93 Difference]: Finished difference Result 316 states and 713 transitions. [2019-12-27 04:43:02,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 04:43:02,139 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:43:02,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:43:02,141 INFO L225 Difference]: With dead ends: 316 [2019-12-27 04:43:02,141 INFO L226 Difference]: Without dead ends: 315 [2019-12-27 04:43:02,141 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 04:43:02,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2019-12-27 04:43:02,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 202. [2019-12-27 04:43:02,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-12-27 04:43:02,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 494 transitions. [2019-12-27 04:43:02,146 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 494 transitions. Word has length 14 [2019-12-27 04:43:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:43:02,146 INFO L462 AbstractCegarLoop]: Abstraction has 202 states and 494 transitions. [2019-12-27 04:43:02,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:43:02,147 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 494 transitions. [2019-12-27 04:43:02,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:43:02,147 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:43:02,147 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:43:02,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:43:02,350 INFO L410 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:43:02,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:43:02,350 INFO L82 PathProgramCache]: Analyzing trace with hash -738372124, now seen corresponding path program 108 times [2019-12-27 04:43:02,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:43:02,351 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739352885] [2019-12-27 04:43:02,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:43:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:43:02,433 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 04:43:02,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739352885] [2019-12-27 04:43:02,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507791661] [2019-12-27 04:43:02,434 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 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 04:43:02,478 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 04:43:02,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:43:02,479 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:43:02,480 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:43:02,596 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 04:43:02,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:43:02,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:43:02,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224411587] [2019-12-27 04:43:02,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:43:02,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:43:02,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:43:02,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:43:02,598 INFO L87 Difference]: Start difference. First operand 202 states and 494 transitions. Second operand 18 states. [2019-12-27 04:43:02,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:43:02,964 INFO L93 Difference]: Finished difference Result 323 states and 724 transitions. [2019-12-27 04:43:02,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 04:43:02,964 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:43:02,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:43:02,966 INFO L225 Difference]: With dead ends: 323 [2019-12-27 04:43:02,967 INFO L226 Difference]: Without dead ends: 321 [2019-12-27 04:43:02,967 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 04:43:02,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2019-12-27 04:43:02,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 202. [2019-12-27 04:43:02,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-12-27 04:43:02,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 494 transitions. [2019-12-27 04:43:02,971 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 494 transitions. Word has length 14 [2019-12-27 04:43:02,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:43:02,972 INFO L462 AbstractCegarLoop]: Abstraction has 202 states and 494 transitions. [2019-12-27 04:43:02,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:43:02,972 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 494 transitions. [2019-12-27 04:43:02,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:43:02,972 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:43:02,972 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:43:03,176 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:43:03,176 INFO L410 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:43:03,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:43:03,176 INFO L82 PathProgramCache]: Analyzing trace with hash -738372279, now seen corresponding path program 109 times [2019-12-27 04:43:03,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:43:03,176 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043225289] [2019-12-27 04:43:03,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:43:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:43:03,265 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 04:43:03,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043225289] [2019-12-27 04:43:03,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270692827] [2019-12-27 04:43:03,265 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 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 04:43:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:43:03,305 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:43:03,306 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:43:03,443 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 04:43:03,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:43:03,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:43:03,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627488269] [2019-12-27 04:43:03,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:43:03,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:43:03,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:43:03,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:43:03,445 INFO L87 Difference]: Start difference. First operand 202 states and 494 transitions. Second operand 18 states. [2019-12-27 04:43:03,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:43:03,943 INFO L93 Difference]: Finished difference Result 330 states and 737 transitions. [2019-12-27 04:43:03,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 04:43:03,944 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:43:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:43:03,945 INFO L225 Difference]: With dead ends: 330 [2019-12-27 04:43:03,945 INFO L226 Difference]: Without dead ends: 328 [2019-12-27 04:43:03,945 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 04:43:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2019-12-27 04:43:03,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 200. [2019-12-27 04:43:03,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-12-27 04:43:03,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 486 transitions. [2019-12-27 04:43:03,949 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 486 transitions. Word has length 14 [2019-12-27 04:43:03,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:43:03,950 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 486 transitions. [2019-12-27 04:43:03,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:43:03,950 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 486 transitions. [2019-12-27 04:43:03,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:43:03,950 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:43:03,950 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:43:04,151 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:43:04,151 INFO L410 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:43:04,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:43:04,151 INFO L82 PathProgramCache]: Analyzing trace with hash -738516274, now seen corresponding path program 110 times [2019-12-27 04:43:04,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:43:04,152 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574871789] [2019-12-27 04:43:04,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:43:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:43:04,258 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 04:43:04,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574871789] [2019-12-27 04:43:04,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556568663] [2019-12-27 04:43:04,258 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 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 04:43:04,305 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 04:43:04,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:43:04,305 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:43:04,306 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:43:04,434 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 04:43:04,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:43:04,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:43:04,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801979983] [2019-12-27 04:43:04,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:43:04,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:43:04,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:43:04,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:43:04,436 INFO L87 Difference]: Start difference. First operand 200 states and 486 transitions. Second operand 18 states. [2019-12-27 04:43:05,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 04:43:05,068 INFO L93 Difference]: Finished difference Result 314 states and 703 transitions. [2019-12-27 04:43:05,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 04:43:05,069 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-12-27 04:43:05,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 04:43:05,070 INFO L225 Difference]: With dead ends: 314 [2019-12-27 04:43:05,070 INFO L226 Difference]: Without dead ends: 312 [2019-12-27 04:43:05,070 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 04:43:05,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2019-12-27 04:43:05,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 199. [2019-12-27 04:43:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-12-27 04:43:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 482 transitions. [2019-12-27 04:43:05,074 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 482 transitions. Word has length 14 [2019-12-27 04:43:05,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 04:43:05,074 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 482 transitions. [2019-12-27 04:43:05,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 04:43:05,075 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 482 transitions. [2019-12-27 04:43:05,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 04:43:05,075 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 04:43:05,075 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 04:43:05,275 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:43:05,276 INFO L410 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 04:43:05,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 04:43:05,276 INFO L82 PathProgramCache]: Analyzing trace with hash -738516429, now seen corresponding path program 111 times [2019-12-27 04:43:05,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 04:43:05,277 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644627032] [2019-12-27 04:43:05,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 04:43:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 04:43:05,363 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 04:43:05,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644627032] [2019-12-27 04:43:05,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592641340] [2019-12-27 04:43:05,364 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 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 04:43:05,406 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 04:43:05,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 04:43:05,407 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 04:43:05,410 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 04:43:06,799 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 04:43:06,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 04:43:06,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2019-12-27 04:43:06,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2563175] [2019-12-27 04:43:06,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 04:43:06,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 04:43:06,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 04:43:06,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-27 04:43:06,800 INFO L87 Difference]: Start difference. First operand 199 states and 482 transitions. Second operand 18 states. Received shutdown request... [2019-12-27 04:43:06,857 WARN L209 SmtUtils]: Removed 3 from assertion stack [2019-12-27 04:43:06,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 04:43:07,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 04:43:07,058 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-27 04:43:07,064 WARN L227 ceAbstractionStarter]: Timeout [2019-12-27 04:43:07,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 04:43:07 BasicIcfg [2019-12-27 04:43:07,065 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-27 04:43:07,066 INFO L168 Benchmark]: Toolchain (without parser) took 284555.96 ms. Allocated memory was 138.4 MB in the beginning and 191.4 MB in the end (delta: 53.0 MB). Free memory was 100.4 MB in the beginning and 151.7 MB in the end (delta: -51.3 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2019-12-27 04:43:07,066 INFO L168 Benchmark]: CDTParser took 1.40 ms. Allocated memory is still 138.4 MB. Free memory is still 120.0 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-12-27 04:43:07,067 INFO L168 Benchmark]: CACSL2BoogieTranslator took 686.16 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 100.0 MB in the beginning and 161.8 MB in the end (delta: -61.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. [2019-12-27 04:43:07,067 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.39 ms. Allocated memory is still 202.4 MB. Free memory was 161.8 MB in the beginning and 159.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2019-12-27 04:43:07,068 INFO L168 Benchmark]: Boogie Preprocessor took 26.39 ms. Allocated memory is still 202.4 MB. Free memory was 159.8 MB in the beginning and 158.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2019-12-27 04:43:07,068 INFO L168 Benchmark]: RCFGBuilder took 398.30 ms. Allocated memory is still 202.4 MB. Free memory was 158.0 MB in the beginning and 137.9 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2019-12-27 04:43:07,069 INFO L168 Benchmark]: TraceAbstraction took 283391.24 ms. Allocated memory was 202.4 MB in the beginning and 191.4 MB in the end (delta: -11.0 MB). Free memory was 137.9 MB in the beginning and 151.7 MB in the end (delta: -13.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-12-27 04:43:07,072 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.40 ms. Allocated memory is still 138.4 MB. Free memory is still 120.0 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 686.16 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 100.0 MB in the beginning and 161.8 MB in the end (delta: -61.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 48.39 ms. Allocated memory is still 202.4 MB. Free memory was 161.8 MB in the beginning and 159.8 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.39 ms. Allocated memory is still 202.4 MB. Free memory was 159.8 MB in the beginning and 158.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 398.30 ms. Allocated memory is still 202.4 MB. Free memory was 158.0 MB in the beginning and 137.9 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 283391.24 ms. Allocated memory was 202.4 MB in the beginning and 191.4 MB in the end (delta: -11.0 MB). Free memory was 137.9 MB in the beginning and 151.7 MB in the end (delta: -13.8 MB). There was no memory consumed. 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 (199states) and FLOYD_HOARE automaton (currently 3 states, 18 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 22 for 6ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 283.2s, OverallIterations: 126, TraceHistogramMax: 7, AutomataDifference: 152.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1286 SDtfs, 20005 SDslu, 11656 SDs, 0 SdLazy, 6897 SolverSat, 4149 SolverUnsat, 21 SolverUnknown, 0 SolverNotchecked, 36.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3716 GetRequests, 597 SyntacticMatches, 15 SemanticMatches, 3103 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 18540 ImplicationChecksByTransitivity, 207.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=229occurred in iteration=108, 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, 125 MinimizatonAttempts, 7445 StatesRemovedByMinimization, 122 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 97.0s InterpolantComputationTime, 3153 NumberOfCodeBlocks, 3153 NumberOfCodeBlocksAsserted, 409 NumberOfCheckSat, 2906 ConstructedInterpolants, 115 QuantifiedInterpolants, 440847 SizeOfPredicates, 2 NumberOfNonLiveVariables, 11287 ConjunctsInSsa, 1331 ConjunctsInUnsatCore, 247 InterpolantComputations, 7 PerfectInterpolantSequences, 42/1946 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