/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-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-fae578e [2019-12-18 23:31:09,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-18 23:31:09,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-18 23:31:09,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-18 23:31:09,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-18 23:31:09,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-18 23:31:09,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-18 23:31:09,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-18 23:31:09,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-18 23:31:09,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-18 23:31:09,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-18 23:31:09,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-18 23:31:09,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-18 23:31:09,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-18 23:31:09,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-18 23:31:09,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-18 23:31:09,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-18 23:31:09,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-18 23:31:09,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-18 23:31:09,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-18 23:31:09,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-18 23:31:09,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-18 23:31:09,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-18 23:31:09,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-18 23:31:09,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-12-18 23:31:09,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-18 23:31:09,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-18 23:31:09,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-18 23:31:09,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-18 23:31:09,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-18 23:31:09,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-18 23:31:09,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-18 23:31:09,401 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-18 23:31:09,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-18 23:31:09,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-18 23:31:09,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-18 23:31:09,406 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-NoLbe.epf [2019-12-18 23:31:09,425 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-18 23:31:09,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-18 23:31:09,428 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-18 23:31:09,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-18 23:31:09,428 INFO L138 SettingsManager]: * Use SBE=true [2019-12-18 23:31:09,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-18 23:31:09,429 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-18 23:31:09,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-18 23:31:09,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-18 23:31:09,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-18 23:31:09,431 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-18 23:31:09,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-18 23:31:09,431 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-18 23:31:09,431 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-18 23:31:09,432 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-18 23:31:09,432 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-18 23:31:09,432 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-18 23:31:09,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-18 23:31:09,432 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-18 23:31:09,433 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-18 23:31:09,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-18 23:31:09,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 23:31:09,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-18 23:31:09,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-18 23:31:09,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-18 23:31:09,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-18 23:31:09,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-18 23:31:09,434 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2019-12-18 23:31:09,435 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-18 23:31:09,435 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-18 23:31:09,698 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-18 23:31:09,716 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-18 23:31:09,719 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-18 23:31:09,721 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-18 23:31:09,721 INFO L275 PluginConnector]: CDTParser initialized [2019-12-18 23:31:09,722 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2019-12-18 23:31:09,786 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faa0f2e6a/9d4738084f424945a7a408cddff08a1e/FLAG0ae1c7a34 [2019-12-18 23:31:10,330 INFO L306 CDTParser]: Found 1 translation units. [2019-12-18 23:31:10,331 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2019-12-18 23:31:10,343 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faa0f2e6a/9d4738084f424945a7a408cddff08a1e/FLAG0ae1c7a34 [2019-12-18 23:31:10,583 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faa0f2e6a/9d4738084f424945a7a408cddff08a1e [2019-12-18 23:31:10,592 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-18 23:31:10,595 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-18 23:31:10,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-18 23:31:10,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-18 23:31:10,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-18 23:31:10,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:31:10" (1/1) ... [2019-12-18 23:31:10,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f1ddbb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:10, skipping insertion in model container [2019-12-18 23:31:10,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:31:10" (1/1) ... [2019-12-18 23:31:10,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-18 23:31:10,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-18 23:31:11,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 23:31:11,127 INFO L203 MainTranslator]: Completed pre-run [2019-12-18 23:31:11,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 23:31:11,252 INFO L208 MainTranslator]: Completed translation [2019-12-18 23:31:11,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11 WrapperNode [2019-12-18 23:31:11,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-18 23:31:11,254 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-18 23:31:11,254 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-18 23:31:11,254 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-18 23:31:11,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11" (1/1) ... [2019-12-18 23:31:11,278 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11" (1/1) ... [2019-12-18 23:31:11,297 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-18 23:31:11,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-18 23:31:11,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-18 23:31:11,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-18 23:31:11,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11" (1/1) ... [2019-12-18 23:31:11,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11" (1/1) ... [2019-12-18 23:31:11,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11" (1/1) ... [2019-12-18 23:31:11,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11" (1/1) ... [2019-12-18 23:31:11,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11" (1/1) ... [2019-12-18 23:31:11,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11" (1/1) ... [2019-12-18 23:31:11,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11" (1/1) ... [2019-12-18 23:31:11,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-18 23:31:11,324 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-18 23:31:11,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-18 23:31:11,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-18 23:31:11,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11" (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 [2019-12-18 23:31:11,402 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-18 23:31:11,402 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-18 23:31:11,402 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-18 23:31:11,402 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-18 23:31:11,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-18 23:31:11,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-18 23:31:11,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-18 23:31:11,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-18 23:31:11,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-18 23:31:11,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-18 23:31:11,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-18 23:31:11,405 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-18 23:31:11,735 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-18 23:31:11,736 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-18 23:31:11,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:31:11 BoogieIcfgContainer [2019-12-18 23:31:11,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-18 23:31:11,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-18 23:31:11,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-18 23:31:11,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-18 23:31:11,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 11:31:10" (1/3) ... [2019-12-18 23:31:11,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dce80de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:31:11, skipping insertion in model container [2019-12-18 23:31:11,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:31:11" (2/3) ... [2019-12-18 23:31:11,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dce80de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:31:11, skipping insertion in model container [2019-12-18 23:31:11,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:31:11" (3/3) ... [2019-12-18 23:31:11,749 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2019-12-18 23:31:11,758 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-18 23:31:11,758 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-18 23:31:11,765 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-18 23:31:11,766 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-18 23:31:11,792 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,793 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,793 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,793 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,794 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,794 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,794 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,795 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,795 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,795 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,796 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,796 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,796 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,797 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,797 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,797 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,798 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,798 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,798 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,799 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,799 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,799 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,800 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,800 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,800 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,801 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,801 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,801 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,802 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,802 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,806 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,806 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,807 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,807 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,807 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,807 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,814 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,815 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,815 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,815 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,816 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,816 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:31:11,838 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-18 23:31:11,855 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-18 23:31:11,856 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-18 23:31:11,856 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-18 23:31:11,856 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-18 23:31:11,856 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-18 23:31:11,856 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-18 23:31:11,857 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-18 23:31:11,857 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-18 23:31:11,866 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 53 transitions [2019-12-18 23:31:11,949 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1244 states. [2019-12-18 23:31:11,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states. [2019-12-18 23:31:11,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-18 23:31:11,961 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:11,962 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:11,962 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:11,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:11,968 INFO L82 PathProgramCache]: Analyzing trace with hash 978645364, now seen corresponding path program 1 times [2019-12-18 23:31:11,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:11,978 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109378348] [2019-12-18 23:31:11,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:12,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109378348] [2019-12-18 23:31:12,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 23:31:12,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-18 23:31:12,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426951213] [2019-12-18 23:31:12,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 23:31:12,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:12,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 23:31:12,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-18 23:31:12,396 INFO L87 Difference]: Start difference. First operand 1244 states. Second operand 5 states. [2019-12-18 23:31:12,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:12,611 INFO L93 Difference]: Finished difference Result 2093 states and 6041 transitions. [2019-12-18 23:31:12,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 23:31:12,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-12-18 23:31:12,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:12,649 INFO L225 Difference]: With dead ends: 2093 [2019-12-18 23:31:12,649 INFO L226 Difference]: Without dead ends: 572 [2019-12-18 23:31:12,653 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-12-18 23:31:12,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2019-12-18 23:31:12,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 460. [2019-12-18 23:31:12,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2019-12-18 23:31:12,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1179 transitions. [2019-12-18 23:31:12,750 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1179 transitions. Word has length 20 [2019-12-18 23:31:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:12,751 INFO L462 AbstractCegarLoop]: Abstraction has 460 states and 1179 transitions. [2019-12-18 23:31:12,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 23:31:12,751 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1179 transitions. [2019-12-18 23:31:12,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-18 23:31:12,753 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:12,754 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:12,754 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:12,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:12,754 INFO L82 PathProgramCache]: Analyzing trace with hash 2103912560, now seen corresponding path program 1 times [2019-12-18 23:31:12,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:12,755 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688718013] [2019-12-18 23:31:12,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:12,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688718013] [2019-12-18 23:31:12,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 23:31:12,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-18 23:31:12,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805902305] [2019-12-18 23:31:12,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-18 23:31:12,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:12,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-18 23:31:12,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-18 23:31:12,963 INFO L87 Difference]: Start difference. First operand 460 states and 1179 transitions. Second operand 6 states. [2019-12-18 23:31:13,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:13,117 INFO L93 Difference]: Finished difference Result 908 states and 2257 transitions. [2019-12-18 23:31:13,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 23:31:13,118 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-12-18 23:31:13,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:13,124 INFO L225 Difference]: With dead ends: 908 [2019-12-18 23:31:13,124 INFO L226 Difference]: Without dead ends: 673 [2019-12-18 23:31:13,127 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-12-18 23:31:13,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2019-12-18 23:31:13,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 554. [2019-12-18 23:31:13,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-12-18 23:31:13,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1367 transitions. [2019-12-18 23:31:13,172 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1367 transitions. Word has length 24 [2019-12-18 23:31:13,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:13,173 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 1367 transitions. [2019-12-18 23:31:13,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-18 23:31:13,173 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1367 transitions. [2019-12-18 23:31:13,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-18 23:31:13,183 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:13,183 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:13,184 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:13,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:13,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1857069363, now seen corresponding path program 1 times [2019-12-18 23:31:13,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:13,185 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482349145] [2019-12-18 23:31:13,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:13,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482349145] [2019-12-18 23:31:13,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619849847] [2019-12-18 23:31:13,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-12-18 23:31:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:13,477 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 23:31:13,484 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:13,573 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:13,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:13,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:13,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-12-18 23:31:13,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200737979] [2019-12-18 23:31:13,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 23:31:13,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:13,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 23:31:13,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-18 23:31:13,590 INFO L87 Difference]: Start difference. First operand 554 states and 1367 transitions. Second operand 10 states. [2019-12-18 23:31:13,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:13,767 INFO L93 Difference]: Finished difference Result 1051 states and 2564 transitions. [2019-12-18 23:31:13,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 23:31:13,769 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-12-18 23:31:13,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:13,775 INFO L225 Difference]: With dead ends: 1051 [2019-12-18 23:31:13,775 INFO L226 Difference]: Without dead ends: 795 [2019-12-18 23:31:13,776 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-18 23:31:13,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2019-12-18 23:31:13,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 653. [2019-12-18 23:31:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 653 states. [2019-12-18 23:31:13,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1575 transitions. [2019-12-18 23:31:13,827 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1575 transitions. Word has length 28 [2019-12-18 23:31:13,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:13,827 INFO L462 AbstractCegarLoop]: Abstraction has 653 states and 1575 transitions. [2019-12-18 23:31:13,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 23:31:13,828 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1575 transitions. [2019-12-18 23:31:13,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-18 23:31:13,829 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:13,829 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:14,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:14,038 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:14,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:14,038 INFO L82 PathProgramCache]: Analyzing trace with hash 960102518, now seen corresponding path program 2 times [2019-12-18 23:31:14,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:14,040 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466567176] [2019-12-18 23:31:14,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:14,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466567176] [2019-12-18 23:31:14,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287247160] [2019-12-18 23:31:14,227 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 [2019-12-18 23:31:14,298 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:31:14,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:14,299 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 23:31:14,308 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:14,406 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:14,409 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:14,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:14,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-12-18 23:31:14,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063305951] [2019-12-18 23:31:14,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 23:31:14,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:14,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 23:31:14,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-12-18 23:31:14,419 INFO L87 Difference]: Start difference. First operand 653 states and 1575 transitions. Second operand 12 states. [2019-12-18 23:31:14,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:14,651 INFO L93 Difference]: Finished difference Result 1187 states and 2864 transitions. [2019-12-18 23:31:14,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 23:31:14,652 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2019-12-18 23:31:14,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:14,658 INFO L225 Difference]: With dead ends: 1187 [2019-12-18 23:31:14,658 INFO L226 Difference]: Without dead ends: 915 [2019-12-18 23:31:14,659 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:14,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2019-12-18 23:31:14,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 713. [2019-12-18 23:31:14,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2019-12-18 23:31:14,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1693 transitions. [2019-12-18 23:31:14,682 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1693 transitions. Word has length 32 [2019-12-18 23:31:14,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:14,683 INFO L462 AbstractCegarLoop]: Abstraction has 713 states and 1693 transitions. [2019-12-18 23:31:14,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 23:31:14,683 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1693 transitions. [2019-12-18 23:31:14,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-18 23:31:14,685 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:14,685 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:14,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:14,889 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:14,890 INFO L82 PathProgramCache]: Analyzing trace with hash 407146487, now seen corresponding path program 1 times [2019-12-18 23:31:14,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:14,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900621664] [2019-12-18 23:31:14,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:15,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900621664] [2019-12-18 23:31:15,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722547805] [2019-12-18 23:31:15,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-12-18 23:31:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:15,179 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 23:31:15,182 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:15,261 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:15,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:15,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:15,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-12-18 23:31:15,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984253519] [2019-12-18 23:31:15,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 23:31:15,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:15,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 23:31:15,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-12-18 23:31:15,269 INFO L87 Difference]: Start difference. First operand 713 states and 1693 transitions. Second operand 12 states. [2019-12-18 23:31:15,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:15,550 INFO L93 Difference]: Finished difference Result 1303 states and 3068 transitions. [2019-12-18 23:31:15,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 23:31:15,550 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2019-12-18 23:31:15,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:15,556 INFO L225 Difference]: With dead ends: 1303 [2019-12-18 23:31:15,557 INFO L226 Difference]: Without dead ends: 1096 [2019-12-18 23:31:15,557 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2019-12-18 23:31:15,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2019-12-18 23:31:15,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 812. [2019-12-18 23:31:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2019-12-18 23:31:15,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1908 transitions. [2019-12-18 23:31:15,584 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1908 transitions. Word has length 32 [2019-12-18 23:31:15,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:15,585 INFO L462 AbstractCegarLoop]: Abstraction has 812 states and 1908 transitions. [2019-12-18 23:31:15,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 23:31:15,586 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1908 transitions. [2019-12-18 23:31:15,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-18 23:31:15,588 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:15,588 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:15,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:15,797 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:15,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:15,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1263102534, now seen corresponding path program 2 times [2019-12-18 23:31:15,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:15,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642931114] [2019-12-18 23:31:15,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:15,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642931114] [2019-12-18 23:31:15,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439820962] [2019-12-18 23:31:15,937 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 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 [2019-12-18 23:31:15,999 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:31:15,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:16,000 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 23:31:16,011 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:16,185 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:16,185 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:16,190 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:16,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:16,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2019-12-18 23:31:16,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043354949] [2019-12-18 23:31:16,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 23:31:16,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:16,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 23:31:16,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-12-18 23:31:16,202 INFO L87 Difference]: Start difference. First operand 812 states and 1908 transitions. Second operand 14 states. [2019-12-18 23:31:16,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:16,746 INFO L93 Difference]: Finished difference Result 1488 states and 3466 transitions. [2019-12-18 23:31:16,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 23:31:16,747 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-12-18 23:31:16,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:16,752 INFO L225 Difference]: With dead ends: 1488 [2019-12-18 23:31:16,752 INFO L226 Difference]: Without dead ends: 1216 [2019-12-18 23:31:16,753 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2019-12-18 23:31:16,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2019-12-18 23:31:16,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 840. [2019-12-18 23:31:16,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 840 states. [2019-12-18 23:31:16,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1968 transitions. [2019-12-18 23:31:16,781 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1968 transitions. Word has length 36 [2019-12-18 23:31:16,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:16,781 INFO L462 AbstractCegarLoop]: Abstraction has 840 states and 1968 transitions. [2019-12-18 23:31:16,781 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 23:31:16,781 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1968 transitions. [2019-12-18 23:31:16,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-18 23:31:16,783 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:16,783 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:16,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:16,996 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:16,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:16,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1895585236, now seen corresponding path program 1 times [2019-12-18 23:31:16,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:16,997 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126535762] [2019-12-18 23:31:16,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:17,134 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126535762] [2019-12-18 23:31:17,134 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419144847] [2019-12-18 23:31:17,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-12-18 23:31:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:17,207 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 23:31:17,209 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:17,317 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:17,317 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:17,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:17,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:17,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2019-12-18 23:31:17,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166377694] [2019-12-18 23:31:17,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 23:31:17,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:17,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 23:31:17,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-12-18 23:31:17,330 INFO L87 Difference]: Start difference. First operand 840 states and 1968 transitions. Second operand 14 states. [2019-12-18 23:31:17,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:17,709 INFO L93 Difference]: Finished difference Result 1620 states and 3710 transitions. [2019-12-18 23:31:17,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 23:31:17,713 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-12-18 23:31:17,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:17,723 INFO L225 Difference]: With dead ends: 1620 [2019-12-18 23:31:17,723 INFO L226 Difference]: Without dead ends: 1413 [2019-12-18 23:31:17,724 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2019-12-18 23:31:17,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2019-12-18 23:31:17,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 905. [2019-12-18 23:31:17,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 905 states. [2019-12-18 23:31:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 2110 transitions. [2019-12-18 23:31:17,757 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 2110 transitions. Word has length 36 [2019-12-18 23:31:17,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:17,757 INFO L462 AbstractCegarLoop]: Abstraction has 905 states and 2110 transitions. [2019-12-18 23:31:17,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 23:31:17,757 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 2110 transitions. [2019-12-18 23:31:17,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-18 23:31:17,759 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:17,759 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:17,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:17,963 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:17,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:17,963 INFO L82 PathProgramCache]: Analyzing trace with hash 99675450, now seen corresponding path program 3 times [2019-12-18 23:31:17,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:17,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135526557] [2019-12-18 23:31:17,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:18,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135526557] [2019-12-18 23:31:18,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528128115] [2019-12-18 23:31:18,124 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 [2019-12-18 23:31:18,179 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 23:31:18,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:18,180 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 23:31:18,183 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:18,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:18,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:18,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:18,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:18,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2019-12-18 23:31:18,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284756082] [2019-12-18 23:31:18,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 23:31:18,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:18,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 23:31:18,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-12-18 23:31:18,265 INFO L87 Difference]: Start difference. First operand 905 states and 2110 transitions. Second operand 14 states. [2019-12-18 23:31:18,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:18,723 INFO L93 Difference]: Finished difference Result 1713 states and 3928 transitions. [2019-12-18 23:31:18,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-18 23:31:18,724 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-12-18 23:31:18,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:18,734 INFO L225 Difference]: With dead ends: 1713 [2019-12-18 23:31:18,734 INFO L226 Difference]: Without dead ends: 1441 [2019-12-18 23:31:18,735 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2019-12-18 23:31:18,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2019-12-18 23:31:18,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 967. [2019-12-18 23:31:18,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 967 states. [2019-12-18 23:31:18,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 2240 transitions. [2019-12-18 23:31:18,789 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 2240 transitions. Word has length 36 [2019-12-18 23:31:18,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:18,790 INFO L462 AbstractCegarLoop]: Abstraction has 967 states and 2240 transitions. [2019-12-18 23:31:18,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 23:31:18,790 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 2240 transitions. [2019-12-18 23:31:18,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-18 23:31:18,792 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:18,792 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:18,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:18,998 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:18,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:18,998 INFO L82 PathProgramCache]: Analyzing trace with hash 699135054, now seen corresponding path program 2 times [2019-12-18 23:31:18,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:18,999 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953609143] [2019-12-18 23:31:18,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:19,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953609143] [2019-12-18 23:31:19,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082569448] [2019-12-18 23:31:19,140 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 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 [2019-12-18 23:31:19,184 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:31:19,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:19,185 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 23:31:19,186 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:19,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:19,290 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:19,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:19,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:19,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2019-12-18 23:31:19,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611704692] [2019-12-18 23:31:19,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 23:31:19,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:19,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 23:31:19,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-12-18 23:31:19,308 INFO L87 Difference]: Start difference. First operand 967 states and 2240 transitions. Second operand 14 states. [2019-12-18 23:31:19,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:19,639 INFO L93 Difference]: Finished difference Result 1656 states and 3775 transitions. [2019-12-18 23:31:19,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 23:31:19,639 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-12-18 23:31:19,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:19,648 INFO L225 Difference]: With dead ends: 1656 [2019-12-18 23:31:19,648 INFO L226 Difference]: Without dead ends: 1491 [2019-12-18 23:31:19,649 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2019-12-18 23:31:19,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2019-12-18 23:31:19,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 967. [2019-12-18 23:31:19,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 967 states. [2019-12-18 23:31:19,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 2240 transitions. [2019-12-18 23:31:19,677 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 2240 transitions. Word has length 36 [2019-12-18 23:31:19,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:19,678 INFO L462 AbstractCegarLoop]: Abstraction has 967 states and 2240 transitions. [2019-12-18 23:31:19,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 23:31:19,678 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 2240 transitions. [2019-12-18 23:31:19,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-18 23:31:19,680 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:19,680 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:19,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:19,889 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:19,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:19,890 INFO L82 PathProgramCache]: Analyzing trace with hash 425329149, now seen corresponding path program 4 times [2019-12-18 23:31:19,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:19,890 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628819254] [2019-12-18 23:31:19,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:20,030 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628819254] [2019-12-18 23:31:20,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086340017] [2019-12-18 23:31:20,031 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 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 [2019-12-18 23:31:20,090 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:31:20,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:20,092 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 23:31:20,100 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:21,036 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:21,036 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:21,040 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:21,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:21,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-18 23:31:21,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410764268] [2019-12-18 23:31:21,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 23:31:21,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:21,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 23:31:21,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=183, Unknown=1, NotChecked=0, Total=240 [2019-12-18 23:31:21,068 INFO L87 Difference]: Start difference. First operand 967 states and 2240 transitions. Second operand 16 states. [2019-12-18 23:31:22,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:22,510 INFO L93 Difference]: Finished difference Result 1707 states and 3867 transitions. [2019-12-18 23:31:22,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 23:31:22,511 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2019-12-18 23:31:22,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:22,518 INFO L225 Difference]: With dead ends: 1707 [2019-12-18 23:31:22,519 INFO L226 Difference]: Without dead ends: 1542 [2019-12-18 23:31:22,519 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=170, Invalid=584, Unknown=2, NotChecked=0, Total=756 [2019-12-18 23:31:22,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-12-18 23:31:22,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 967. [2019-12-18 23:31:22,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 967 states. [2019-12-18 23:31:22,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 2240 transitions. [2019-12-18 23:31:22,544 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 2240 transitions. Word has length 40 [2019-12-18 23:31:22,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:22,545 INFO L462 AbstractCegarLoop]: Abstraction has 967 states and 2240 transitions. [2019-12-18 23:31:22,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 23:31:22,545 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 2240 transitions. [2019-12-18 23:31:22,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-18 23:31:22,547 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:22,547 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:22,750 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:22,751 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:22,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:22,751 INFO L82 PathProgramCache]: Analyzing trace with hash -710950377, now seen corresponding path program 3 times [2019-12-18 23:31:22,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:22,752 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825683202] [2019-12-18 23:31:22,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:22,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825683202] [2019-12-18 23:31:22,880 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855581383] [2019-12-18 23:31:22,880 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 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 [2019-12-18 23:31:22,942 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 23:31:22,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:22,942 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 23:31:22,944 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:23,100 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:23,101 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:23,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:23,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:23,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-18 23:31:23,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849314258] [2019-12-18 23:31:23,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 23:31:23,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:23,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 23:31:23,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2019-12-18 23:31:23,123 INFO L87 Difference]: Start difference. First operand 967 states and 2240 transitions. Second operand 16 states. [2019-12-18 23:31:24,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:24,033 INFO L93 Difference]: Finished difference Result 1835 states and 4140 transitions. [2019-12-18 23:31:24,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 23:31:24,033 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2019-12-18 23:31:24,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:24,042 INFO L225 Difference]: With dead ends: 1835 [2019-12-18 23:31:24,042 INFO L226 Difference]: Without dead ends: 1670 [2019-12-18 23:31:24,043 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2019-12-18 23:31:24,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2019-12-18 23:31:24,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1011. [2019-12-18 23:31:24,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1011 states. [2019-12-18 23:31:24,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 2347 transitions. [2019-12-18 23:31:24,069 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 2347 transitions. Word has length 40 [2019-12-18 23:31:24,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:24,069 INFO L462 AbstractCegarLoop]: Abstraction has 1011 states and 2347 transitions. [2019-12-18 23:31:24,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 23:31:24,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 2347 transitions. [2019-12-18 23:31:24,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-18 23:31:24,071 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:24,072 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:24,281 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:24,281 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:24,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:24,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1907400559, now seen corresponding path program 4 times [2019-12-18 23:31:24,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:24,282 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463014215] [2019-12-18 23:31:24,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:24,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463014215] [2019-12-18 23:31:24,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435862603] [2019-12-18 23:31:24,413 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 [2019-12-18 23:31:24,459 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:31:24,459 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:24,459 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 23:31:24,460 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:24,579 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:24,580 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:24,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:24,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-18 23:31:24,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279595885] [2019-12-18 23:31:24,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 23:31:24,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:24,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 23:31:24,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-12-18 23:31:24,586 INFO L87 Difference]: Start difference. First operand 1011 states and 2347 transitions. Second operand 16 states. [2019-12-18 23:31:25,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:25,059 INFO L93 Difference]: Finished difference Result 1967 states and 4400 transitions. [2019-12-18 23:31:25,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-18 23:31:25,062 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2019-12-18 23:31:25,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:25,069 INFO L225 Difference]: With dead ends: 1967 [2019-12-18 23:31:25,069 INFO L226 Difference]: Without dead ends: 1802 [2019-12-18 23:31:25,070 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2019-12-18 23:31:25,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2019-12-18 23:31:25,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 989. [2019-12-18 23:31:25,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 989 states. [2019-12-18 23:31:25,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 2316 transitions. [2019-12-18 23:31:25,094 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 2316 transitions. Word has length 40 [2019-12-18 23:31:25,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:25,094 INFO L462 AbstractCegarLoop]: Abstraction has 989 states and 2316 transitions. [2019-12-18 23:31:25,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 23:31:25,095 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 2316 transitions. [2019-12-18 23:31:25,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-18 23:31:25,096 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:25,096 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:25,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:25,300 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:25,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:25,300 INFO L82 PathProgramCache]: Analyzing trace with hash -2081625269, now seen corresponding path program 1 times [2019-12-18 23:31:25,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:25,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952226992] [2019-12-18 23:31:25,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:25,459 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:25,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952226992] [2019-12-18 23:31:25,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998515720] [2019-12-18 23:31:25,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-12-18 23:31:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:25,510 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 23:31:25,513 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:25,617 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:25,618 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:25,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:25,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:25,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-18 23:31:25,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361337009] [2019-12-18 23:31:25,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 23:31:25,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:25,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 23:31:25,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-12-18 23:31:25,634 INFO L87 Difference]: Start difference. First operand 989 states and 2316 transitions. Second operand 16 states. [2019-12-18 23:31:25,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:25,973 INFO L93 Difference]: Finished difference Result 1797 states and 4092 transitions. [2019-12-18 23:31:25,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 23:31:25,974 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2019-12-18 23:31:25,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:25,980 INFO L225 Difference]: With dead ends: 1797 [2019-12-18 23:31:25,980 INFO L226 Difference]: Without dead ends: 1590 [2019-12-18 23:31:25,981 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2019-12-18 23:31:25,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2019-12-18 23:31:26,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1071. [2019-12-18 23:31:26,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1071 states. [2019-12-18 23:31:26,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 2484 transitions. [2019-12-18 23:31:26,004 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 2484 transitions. Word has length 40 [2019-12-18 23:31:26,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:26,004 INFO L462 AbstractCegarLoop]: Abstraction has 1071 states and 2484 transitions. [2019-12-18 23:31:26,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 23:31:26,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 2484 transitions. [2019-12-18 23:31:26,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-18 23:31:26,006 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:26,006 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:26,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:26,209 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:26,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:26,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1295353087, now seen corresponding path program 5 times [2019-12-18 23:31:26,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:26,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920965331] [2019-12-18 23:31:26,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:26,344 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920965331] [2019-12-18 23:31:26,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425858424] [2019-12-18 23:31:26,345 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 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 [2019-12-18 23:31:26,392 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 23:31:26,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:26,393 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 23:31:26,394 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:26,526 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:26,526 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:26,536 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:26,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:26,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2019-12-18 23:31:26,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588177163] [2019-12-18 23:31:26,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 23:31:26,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:26,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 23:31:26,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2019-12-18 23:31:26,545 INFO L87 Difference]: Start difference. First operand 1071 states and 2484 transitions. Second operand 16 states. [2019-12-18 23:31:27,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:27,605 INFO L93 Difference]: Finished difference Result 1976 states and 4422 transitions. [2019-12-18 23:31:27,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-18 23:31:27,605 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2019-12-18 23:31:27,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:27,614 INFO L225 Difference]: With dead ends: 1976 [2019-12-18 23:31:27,615 INFO L226 Difference]: Without dead ends: 1811 [2019-12-18 23:31:27,615 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2019-12-18 23:31:27,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2019-12-18 23:31:27,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1105. [2019-12-18 23:31:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1105 states. [2019-12-18 23:31:27,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 2554 transitions. [2019-12-18 23:31:27,640 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 2554 transitions. Word has length 40 [2019-12-18 23:31:27,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:27,641 INFO L462 AbstractCegarLoop]: Abstraction has 1105 states and 2554 transitions. [2019-12-18 23:31:27,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 23:31:27,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 2554 transitions. [2019-12-18 23:31:27,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:27,643 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:27,643 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:27,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:27,847 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:27,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:27,848 INFO L82 PathProgramCache]: Analyzing trace with hash 643650778, now seen corresponding path program 6 times [2019-12-18 23:31:27,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:27,848 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763249310] [2019-12-18 23:31:27,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:28,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:28,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763249310] [2019-12-18 23:31:28,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980061362] [2019-12-18 23:31:28,041 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 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 [2019-12-18 23:31:28,106 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 23:31:28,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:28,107 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:28,108 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:28,639 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:28,640 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:28,644 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:28,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:28,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:28,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770971451] [2019-12-18 23:31:28,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:28,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:28,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:28,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:28,651 INFO L87 Difference]: Start difference. First operand 1105 states and 2554 transitions. Second operand 18 states. [2019-12-18 23:31:29,724 WARN L192 SmtUtils]: Spent 748.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2019-12-18 23:31:30,315 WARN L192 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2019-12-18 23:31:31,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:31,002 INFO L93 Difference]: Finished difference Result 2231 states and 4985 transitions. [2019-12-18 23:31:31,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 23:31:31,003 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:31,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:31,010 INFO L225 Difference]: With dead ends: 2231 [2019-12-18 23:31:31,010 INFO L226 Difference]: Without dead ends: 1959 [2019-12-18 23:31:31,011 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 23:31:31,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2019-12-18 23:31:31,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1154. [2019-12-18 23:31:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1154 states. [2019-12-18 23:31:31,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 2659 transitions. [2019-12-18 23:31:31,057 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 2659 transitions. Word has length 44 [2019-12-18 23:31:31,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:31,057 INFO L462 AbstractCegarLoop]: Abstraction has 1154 states and 2659 transitions. [2019-12-18 23:31:31,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:31,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 2659 transitions. [2019-12-18 23:31:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:31,060 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:31,060 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:31,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:31,269 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:31,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:31,270 INFO L82 PathProgramCache]: Analyzing trace with hash -885950476, now seen corresponding path program 7 times [2019-12-18 23:31:31,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:31,270 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957817152] [2019-12-18 23:31:31,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:31,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957817152] [2019-12-18 23:31:31,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053960261] [2019-12-18 23:31:31,424 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 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 [2019-12-18 23:31:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:31,475 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:31,476 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:31,664 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:31,664 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:31,667 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:31,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:31,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:31,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482469587] [2019-12-18 23:31:31,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:31,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:31,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:31,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:31,675 INFO L87 Difference]: Start difference. First operand 1154 states and 2659 transitions. Second operand 18 states. [2019-12-18 23:31:32,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:32,331 INFO L93 Difference]: Finished difference Result 2268 states and 5009 transitions. [2019-12-18 23:31:32,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 23:31:32,332 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:32,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:32,337 INFO L225 Difference]: With dead ends: 2268 [2019-12-18 23:31:32,338 INFO L226 Difference]: Without dead ends: 2103 [2019-12-18 23:31:32,338 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=242, Invalid=880, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 23:31:32,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2019-12-18 23:31:32,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 1202. [2019-12-18 23:31:32,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1202 states. [2019-12-18 23:31:32,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 2779 transitions. [2019-12-18 23:31:32,366 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 2779 transitions. Word has length 44 [2019-12-18 23:31:32,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:32,366 INFO L462 AbstractCegarLoop]: Abstraction has 1202 states and 2779 transitions. [2019-12-18 23:31:32,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:32,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 2779 transitions. [2019-12-18 23:31:32,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:32,368 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:32,369 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:32,572 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:32,572 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:32,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:32,573 INFO L82 PathProgramCache]: Analyzing trace with hash -552799404, now seen corresponding path program 8 times [2019-12-18 23:31:32,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:32,573 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444974026] [2019-12-18 23:31:32,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:32,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444974026] [2019-12-18 23:31:32,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664358968] [2019-12-18 23:31:32,726 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 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 [2019-12-18 23:31:32,800 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:31:32,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:32,801 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:32,802 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:33,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:33,570 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:33,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:33,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:33,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:33,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590183652] [2019-12-18 23:31:33,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:33,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:33,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:33,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=235, Unknown=1, NotChecked=0, Total=306 [2019-12-18 23:31:33,582 INFO L87 Difference]: Start difference. First operand 1202 states and 2779 transitions. Second operand 18 states. [2019-12-18 23:31:34,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:34,481 INFO L93 Difference]: Finished difference Result 2280 states and 5062 transitions. [2019-12-18 23:31:34,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 23:31:34,481 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:34,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:34,485 INFO L225 Difference]: With dead ends: 2280 [2019-12-18 23:31:34,485 INFO L226 Difference]: Without dead ends: 2115 [2019-12-18 23:31:34,486 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=238, Invalid=817, Unknown=1, NotChecked=0, Total=1056 [2019-12-18 23:31:34,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2019-12-18 23:31:34,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1202. [2019-12-18 23:31:34,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1202 states. [2019-12-18 23:31:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 2779 transitions. [2019-12-18 23:31:34,511 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 2779 transitions. Word has length 44 [2019-12-18 23:31:34,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:34,511 INFO L462 AbstractCegarLoop]: Abstraction has 1202 states and 2779 transitions. [2019-12-18 23:31:34,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:34,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 2779 transitions. [2019-12-18 23:31:34,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:34,513 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:34,513 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:34,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:34,718 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:34,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:34,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1772033396, now seen corresponding path program 9 times [2019-12-18 23:31:34,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:34,719 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430323850] [2019-12-18 23:31:34,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:34,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430323850] [2019-12-18 23:31:34,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294730894] [2019-12-18 23:31:34,892 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 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 [2019-12-18 23:31:34,963 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-18 23:31:34,963 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:34,964 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:34,965 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:35,166 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:35,167 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:35,171 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:35,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:35,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:35,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949166518] [2019-12-18 23:31:35,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:35,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:35,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:35,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:35,182 INFO L87 Difference]: Start difference. First operand 1202 states and 2779 transitions. Second operand 18 states. [2019-12-18 23:31:35,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:35,775 INFO L93 Difference]: Finished difference Result 2271 states and 5047 transitions. [2019-12-18 23:31:35,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 23:31:35,776 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:35,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:35,780 INFO L225 Difference]: With dead ends: 2271 [2019-12-18 23:31:35,780 INFO L226 Difference]: Without dead ends: 2106 [2019-12-18 23:31:35,781 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 23:31:35,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-12-18 23:31:35,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1184. [2019-12-18 23:31:35,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1184 states. [2019-12-18 23:31:35,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 2749 transitions. [2019-12-18 23:31:35,808 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 2749 transitions. Word has length 44 [2019-12-18 23:31:35,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:35,808 INFO L462 AbstractCegarLoop]: Abstraction has 1184 states and 2749 transitions. [2019-12-18 23:31:35,808 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:35,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 2749 transitions. [2019-12-18 23:31:35,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:35,810 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:35,810 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:36,020 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:36,020 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:36,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:36,021 INFO L82 PathProgramCache]: Analyzing trace with hash -393873042, now seen corresponding path program 10 times [2019-12-18 23:31:36,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:36,022 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926484847] [2019-12-18 23:31:36,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:36,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926484847] [2019-12-18 23:31:36,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846963094] [2019-12-18 23:31:36,166 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 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 [2019-12-18 23:31:36,215 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:31:36,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:36,216 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:36,217 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:36,761 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:36,762 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:36,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:36,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:36,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:36,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295018899] [2019-12-18 23:31:36,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:36,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:36,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:36,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:36,796 INFO L87 Difference]: Start difference. First operand 1184 states and 2749 transitions. Second operand 18 states. [2019-12-18 23:31:37,930 WARN L192 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 20 [2019-12-18 23:31:39,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:39,341 INFO L93 Difference]: Finished difference Result 2392 states and 5309 transitions. [2019-12-18 23:31:39,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 23:31:39,343 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:39,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:39,348 INFO L225 Difference]: With dead ends: 2392 [2019-12-18 23:31:39,348 INFO L226 Difference]: Without dead ends: 2227 [2019-12-18 23:31:39,349 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=247, Invalid=873, Unknown=2, NotChecked=0, Total=1122 [2019-12-18 23:31:39,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2227 states. [2019-12-18 23:31:39,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2227 to 1200. [2019-12-18 23:31:39,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1200 states. [2019-12-18 23:31:39,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 2789 transitions. [2019-12-18 23:31:39,368 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 2789 transitions. Word has length 44 [2019-12-18 23:31:39,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:39,368 INFO L462 AbstractCegarLoop]: Abstraction has 1200 states and 2789 transitions. [2019-12-18 23:31:39,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:39,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 2789 transitions. [2019-12-18 23:31:39,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:39,370 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:39,370 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:39,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:39,573 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:39,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:39,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1301891438, now seen corresponding path program 11 times [2019-12-18 23:31:39,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:39,575 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591015754] [2019-12-18 23:31:39,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:39,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591015754] [2019-12-18 23:31:39,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741559758] [2019-12-18 23:31:39,756 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 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 [2019-12-18 23:31:39,806 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 23:31:39,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:39,807 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:39,809 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:39,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:39,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:39,958 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:39,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:39,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:39,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161277579] [2019-12-18 23:31:39,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:39,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:39,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:39,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:39,968 INFO L87 Difference]: Start difference. First operand 1200 states and 2789 transitions. Second operand 18 states. [2019-12-18 23:31:40,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:40,703 INFO L93 Difference]: Finished difference Result 2670 states and 5930 transitions. [2019-12-18 23:31:40,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-18 23:31:40,708 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:40,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:40,713 INFO L225 Difference]: With dead ends: 2670 [2019-12-18 23:31:40,713 INFO L226 Difference]: Without dead ends: 2398 [2019-12-18 23:31:40,714 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=342, Invalid=1298, Unknown=0, NotChecked=0, Total=1640 [2019-12-18 23:31:40,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2019-12-18 23:31:40,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 1248. [2019-12-18 23:31:40,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1248 states. [2019-12-18 23:31:40,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 2902 transitions. [2019-12-18 23:31:40,744 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 2902 transitions. Word has length 44 [2019-12-18 23:31:40,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:40,744 INFO L462 AbstractCegarLoop]: Abstraction has 1248 states and 2902 transitions. [2019-12-18 23:31:40,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:40,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 2902 transitions. [2019-12-18 23:31:40,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:40,746 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:40,746 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:40,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:40,950 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:40,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:40,950 INFO L82 PathProgramCache]: Analyzing trace with hash 2093415172, now seen corresponding path program 12 times [2019-12-18 23:31:40,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:40,950 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648755483] [2019-12-18 23:31:40,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:41,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648755483] [2019-12-18 23:31:41,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138241491] [2019-12-18 23:31:41,093 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 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 [2019-12-18 23:31:41,164 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 23:31:41,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:41,165 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-18 23:31:41,166 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:41,292 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:41,293 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:41,294 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:41,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:41,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2019-12-18 23:31:41,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226520601] [2019-12-18 23:31:41,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-18 23:31:41,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:41,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-18 23:31:41,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2019-12-18 23:31:41,320 INFO L87 Difference]: Start difference. First operand 1248 states and 2902 transitions. Second operand 19 states. [2019-12-18 23:31:41,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:41,854 INFO L93 Difference]: Finished difference Result 2365 states and 5257 transitions. [2019-12-18 23:31:41,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 23:31:41,855 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2019-12-18 23:31:41,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:41,861 INFO L225 Difference]: With dead ends: 2365 [2019-12-18 23:31:41,861 INFO L226 Difference]: Without dead ends: 2200 [2019-12-18 23:31:41,861 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2019-12-18 23:31:41,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2019-12-18 23:31:41,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1262. [2019-12-18 23:31:41,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1262 states. [2019-12-18 23:31:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 2952 transitions. [2019-12-18 23:31:41,889 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 2952 transitions. Word has length 44 [2019-12-18 23:31:41,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:41,889 INFO L462 AbstractCegarLoop]: Abstraction has 1262 states and 2952 transitions. [2019-12-18 23:31:41,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-18 23:31:41,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 2952 transitions. [2019-12-18 23:31:41,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:41,891 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:41,892 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:42,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:42,095 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:42,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:42,095 INFO L82 PathProgramCache]: Analyzing trace with hash -811669720, now seen corresponding path program 2 times [2019-12-18 23:31:42,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:42,095 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685864239] [2019-12-18 23:31:42,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:42,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685864239] [2019-12-18 23:31:42,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762254453] [2019-12-18 23:31:42,254 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 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 [2019-12-18 23:31:42,296 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:31:42,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:42,297 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:42,298 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:42,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:42,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:42,412 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:42,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:42,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:42,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516420129] [2019-12-18 23:31:42,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:42,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:42,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:42,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:42,419 INFO L87 Difference]: Start difference. First operand 1262 states and 2952 transitions. Second operand 18 states. [2019-12-18 23:31:42,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:42,848 INFO L93 Difference]: Finished difference Result 2190 states and 4954 transitions. [2019-12-18 23:31:42,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 23:31:42,849 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:42,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:42,852 INFO L225 Difference]: With dead ends: 2190 [2019-12-18 23:31:42,852 INFO L226 Difference]: Without dead ends: 1983 [2019-12-18 23:31:42,853 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2019-12-18 23:31:42,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2019-12-18 23:31:42,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1321. [2019-12-18 23:31:42,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1321 states. [2019-12-18 23:31:42,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 3058 transitions. [2019-12-18 23:31:42,877 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 3058 transitions. Word has length 44 [2019-12-18 23:31:42,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:42,878 INFO L462 AbstractCegarLoop]: Abstraction has 1321 states and 3058 transitions. [2019-12-18 23:31:42,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:42,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 3058 transitions. [2019-12-18 23:31:42,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:42,880 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:42,880 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:43,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:43,083 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:43,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:43,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1258163468, now seen corresponding path program 13 times [2019-12-18 23:31:43,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:43,085 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302512546] [2019-12-18 23:31:43,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:43,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302512546] [2019-12-18 23:31:43,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869695348] [2019-12-18 23:31:43,276 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 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 [2019-12-18 23:31:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:43,319 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:43,320 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:43,457 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:43,458 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:43,461 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:43,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:43,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:43,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530292780] [2019-12-18 23:31:43,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:43,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:43,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:43,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:43,469 INFO L87 Difference]: Start difference. First operand 1321 states and 3058 transitions. Second operand 18 states. [2019-12-18 23:31:44,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:44,064 INFO L93 Difference]: Finished difference Result 2365 states and 5271 transitions. [2019-12-18 23:31:44,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 23:31:44,064 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:44,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:44,068 INFO L225 Difference]: With dead ends: 2365 [2019-12-18 23:31:44,068 INFO L226 Difference]: Without dead ends: 2200 [2019-12-18 23:31:44,069 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2019-12-18 23:31:44,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2019-12-18 23:31:44,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1339. [2019-12-18 23:31:44,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1339 states. [2019-12-18 23:31:44,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 3088 transitions. [2019-12-18 23:31:44,091 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 3088 transitions. Word has length 44 [2019-12-18 23:31:44,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:44,092 INFO L462 AbstractCegarLoop]: Abstraction has 1339 states and 3088 transitions. [2019-12-18 23:31:44,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:44,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 3088 transitions. [2019-12-18 23:31:44,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:44,094 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:44,094 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:44,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:44,296 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:44,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:44,296 INFO L82 PathProgramCache]: Analyzing trace with hash -578663954, now seen corresponding path program 14 times [2019-12-18 23:31:44,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:44,297 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268098643] [2019-12-18 23:31:44,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:44,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268098643] [2019-12-18 23:31:44,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649163235] [2019-12-18 23:31:44,475 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 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 [2019-12-18 23:31:44,537 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:31:44,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:44,538 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:44,539 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:44,763 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:44,764 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:44,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:44,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:44,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:44,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685189624] [2019-12-18 23:31:44,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:44,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:44,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:44,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:44,779 INFO L87 Difference]: Start difference. First operand 1339 states and 3088 transitions. Second operand 18 states. [2019-12-18 23:31:46,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:46,232 INFO L93 Difference]: Finished difference Result 2582 states and 5693 transitions. [2019-12-18 23:31:46,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-18 23:31:46,233 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:46,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:46,236 INFO L225 Difference]: With dead ends: 2582 [2019-12-18 23:31:46,236 INFO L226 Difference]: Without dead ends: 2417 [2019-12-18 23:31:46,237 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=259, Invalid=931, Unknown=0, NotChecked=0, Total=1190 [2019-12-18 23:31:46,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2019-12-18 23:31:46,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1339. [2019-12-18 23:31:46,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1339 states. [2019-12-18 23:31:46,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 3088 transitions. [2019-12-18 23:31:46,258 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 3088 transitions. Word has length 44 [2019-12-18 23:31:46,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:46,258 INFO L462 AbstractCegarLoop]: Abstraction has 1339 states and 3088 transitions. [2019-12-18 23:31:46,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:46,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 3088 transitions. [2019-12-18 23:31:46,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:46,260 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:46,260 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:46,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:46,463 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:46,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:46,463 INFO L82 PathProgramCache]: Analyzing trace with hash -395470354, now seen corresponding path program 15 times [2019-12-18 23:31:46,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:46,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800591983] [2019-12-18 23:31:46,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:46,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800591983] [2019-12-18 23:31:46,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018901017] [2019-12-18 23:31:46,640 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 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 [2019-12-18 23:31:46,684 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 23:31:46,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:46,685 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:46,686 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:46,806 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:46,806 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:46,809 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:46,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:46,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:46,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675295248] [2019-12-18 23:31:46,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:46,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:46,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:46,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:46,815 INFO L87 Difference]: Start difference. First operand 1339 states and 3088 transitions. Second operand 18 states. [2019-12-18 23:31:47,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:47,436 INFO L93 Difference]: Finished difference Result 2715 states and 6008 transitions. [2019-12-18 23:31:47,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-18 23:31:47,437 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:47,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:47,441 INFO L225 Difference]: With dead ends: 2715 [2019-12-18 23:31:47,441 INFO L226 Difference]: Without dead ends: 2550 [2019-12-18 23:31:47,442 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=287, Invalid=1045, Unknown=0, NotChecked=0, Total=1332 [2019-12-18 23:31:47,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2019-12-18 23:31:47,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 1339. [2019-12-18 23:31:47,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1339 states. [2019-12-18 23:31:47,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 3088 transitions. [2019-12-18 23:31:47,470 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 3088 transitions. Word has length 44 [2019-12-18 23:31:47,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:47,470 INFO L462 AbstractCegarLoop]: Abstraction has 1339 states and 3088 transitions. [2019-12-18 23:31:47,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:47,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 3088 transitions. [2019-12-18 23:31:47,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:47,472 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:47,472 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:47,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:47,676 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:47,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:47,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1733590504, now seen corresponding path program 16 times [2019-12-18 23:31:47,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:47,677 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277640550] [2019-12-18 23:31:47,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:47,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277640550] [2019-12-18 23:31:47,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901671883] [2019-12-18 23:31:47,861 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 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 [2019-12-18 23:31:47,928 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:31:47,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:47,930 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:47,932 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:48,120 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:48,121 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:48,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:48,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:48,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282781815] [2019-12-18 23:31:48,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:48,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:48,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:48,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:48,132 INFO L87 Difference]: Start difference. First operand 1339 states and 3088 transitions. Second operand 18 states. [2019-12-18 23:31:48,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:48,727 INFO L93 Difference]: Finished difference Result 2608 states and 5803 transitions. [2019-12-18 23:31:48,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-18 23:31:48,727 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:48,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:48,730 INFO L225 Difference]: With dead ends: 2608 [2019-12-18 23:31:48,730 INFO L226 Difference]: Without dead ends: 2443 [2019-12-18 23:31:48,731 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2019-12-18 23:31:48,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2019-12-18 23:31:48,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 1307. [2019-12-18 23:31:48,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1307 states. [2019-12-18 23:31:48,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 3008 transitions. [2019-12-18 23:31:48,754 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 3008 transitions. Word has length 44 [2019-12-18 23:31:48,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:48,754 INFO L462 AbstractCegarLoop]: Abstraction has 1307 states and 3008 transitions. [2019-12-18 23:31:48,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:48,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 3008 transitions. [2019-12-18 23:31:48,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-18 23:31:48,755 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:48,756 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:48,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:48,957 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:48,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:48,957 INFO L82 PathProgramCache]: Analyzing trace with hash 826388830, now seen corresponding path program 17 times [2019-12-18 23:31:48,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:48,958 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540732547] [2019-12-18 23:31:48,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:49,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540732547] [2019-12-18 23:31:49,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693797692] [2019-12-18 23:31:49,112 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 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 [2019-12-18 23:31:49,154 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-18 23:31:49,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:49,155 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:31:49,156 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:49,261 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:49,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:49,267 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:49,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:49,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2019-12-18 23:31:49,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489900630] [2019-12-18 23:31:49,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:31:49,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:49,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:31:49,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:31:49,274 INFO L87 Difference]: Start difference. First operand 1307 states and 3008 transitions. Second operand 18 states. [2019-12-18 23:31:49,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:49,945 INFO L93 Difference]: Finished difference Result 2483 states and 5546 transitions. [2019-12-18 23:31:49,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-18 23:31:49,946 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2019-12-18 23:31:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:49,949 INFO L225 Difference]: With dead ends: 2483 [2019-12-18 23:31:49,949 INFO L226 Difference]: Without dead ends: 2211 [2019-12-18 23:31:49,950 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=1054, Unknown=0, NotChecked=0, Total=1332 [2019-12-18 23:31:49,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2019-12-18 23:31:49,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1366. [2019-12-18 23:31:49,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1366 states. [2019-12-18 23:31:49,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 3126 transitions. [2019-12-18 23:31:49,968 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 3126 transitions. Word has length 44 [2019-12-18 23:31:49,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:49,968 INFO L462 AbstractCegarLoop]: Abstraction has 1366 states and 3126 transitions. [2019-12-18 23:31:49,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:31:49,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 3126 transitions. [2019-12-18 23:31:49,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:31:49,970 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:49,970 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:50,171 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:50,171 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:50,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:50,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1986924233, now seen corresponding path program 18 times [2019-12-18 23:31:50,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:50,173 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296689457] [2019-12-18 23:31:50,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:50,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296689457] [2019-12-18 23:31:50,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606322200] [2019-12-18 23:31:50,652 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 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 [2019-12-18 23:31:50,736 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 23:31:50,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:31:50,738 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:31:50,740 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:52,248 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:52,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:52,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:52,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:52,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:31:52,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957904864] [2019-12-18 23:31:52,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:31:52,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:52,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:31:52,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=300, Unknown=1, NotChecked=0, Total=380 [2019-12-18 23:31:52,259 INFO L87 Difference]: Start difference. First operand 1366 states and 3126 transitions. Second operand 20 states. [2019-12-18 23:31:53,120 WARN L192 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 20 [2019-12-18 23:31:53,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:53,408 INFO L93 Difference]: Finished difference Result 2765 states and 6071 transitions. [2019-12-18 23:31:53,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-18 23:31:53,408 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:31:53,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:53,412 INFO L225 Difference]: With dead ends: 2765 [2019-12-18 23:31:53,412 INFO L226 Difference]: Without dead ends: 2600 [2019-12-18 23:31:53,413 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=302, Invalid=1103, Unknown=1, NotChecked=0, Total=1406 [2019-12-18 23:31:53,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2019-12-18 23:31:53,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 1414. [2019-12-18 23:31:53,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1414 states. [2019-12-18 23:31:53,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 3246 transitions. [2019-12-18 23:31:53,438 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 3246 transitions. Word has length 48 [2019-12-18 23:31:53,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:53,439 INFO L462 AbstractCegarLoop]: Abstraction has 1414 states and 3246 transitions. [2019-12-18 23:31:53,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:31:53,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 3246 transitions. [2019-12-18 23:31:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:31:53,441 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:53,441 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:31:53,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:31:53,644 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:31:53,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:31:53,644 INFO L82 PathProgramCache]: Analyzing trace with hash 512133277, now seen corresponding path program 19 times [2019-12-18 23:31:53,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:31:53,645 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867910170] [2019-12-18 23:31:53,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:31:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:53,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867910170] [2019-12-18 23:31:53,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158359139] [2019-12-18 23:31:53,852 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 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 [2019-12-18 23:31:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:31:53,909 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:31:53,910 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:31:54,296 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:54,296 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:54,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:31:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:31:54,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:31:54,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:31:54,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430484490] [2019-12-18 23:31:54,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:31:54,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:31:54,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:31:54,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:31:54,309 INFO L87 Difference]: Start difference. First operand 1414 states and 3246 transitions. Second operand 20 states. [2019-12-18 23:31:55,611 WARN L192 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2019-12-18 23:31:56,921 WARN L192 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-18 23:31:57,448 WARN L192 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2019-12-18 23:31:59,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:31:59,818 INFO L93 Difference]: Finished difference Result 2870 states and 6293 transitions. [2019-12-18 23:31:59,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-18 23:31:59,819 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:31:59,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:31:59,823 INFO L225 Difference]: With dead ends: 2870 [2019-12-18 23:31:59,823 INFO L226 Difference]: Without dead ends: 2705 [2019-12-18 23:31:59,824 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=302, Invalid=1103, Unknown=1, NotChecked=0, Total=1406 [2019-12-18 23:31:59,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2019-12-18 23:31:59,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 1426. [2019-12-18 23:31:59,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1426 states. [2019-12-18 23:31:59,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 3273 transitions. [2019-12-18 23:31:59,850 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 3273 transitions. Word has length 48 [2019-12-18 23:31:59,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:31:59,850 INFO L462 AbstractCegarLoop]: Abstraction has 1426 states and 3273 transitions. [2019-12-18 23:31:59,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:31:59,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 3273 transitions. [2019-12-18 23:31:59,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:31:59,852 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:31:59,853 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:32:00,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:32:00,056 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:32:00,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:32:00,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1653773161, now seen corresponding path program 20 times [2019-12-18 23:32:00,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:32:00,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020158756] [2019-12-18 23:32:00,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:32:00,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:32:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:00,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020158756] [2019-12-18 23:32:00,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120140040] [2019-12-18 23:32:00,269 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 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 [2019-12-18 23:32:00,336 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:32:00,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:32:00,338 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:32:00,340 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:32:02,758 WARN L192 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 23:32:03,146 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~j~0_89 Int)) (and (<= (div (+ (* v_~j~0_89 (- 1)) 1) (- 3)) 1) (<= c_~j~0 (+ (* 2 v_~j~0_89) c_~i~0 1)) (<= c_~i~0 (+ (* 3 v_~j~0_89) 2)))) is different from true [2019-12-18 23:32:03,147 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:03,147 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:03,151 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:03,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:32:03,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:32:03,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124615916] [2019-12-18 23:32:03,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:32:03,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:32:03,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:32:03,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=4, NotChecked=34, Total=380 [2019-12-18 23:32:03,162 INFO L87 Difference]: Start difference. First operand 1426 states and 3273 transitions. Second operand 20 states. [2019-12-18 23:32:04,121 WARN L192 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2019-12-18 23:32:05,955 WARN L192 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2019-12-18 23:32:06,716 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-12-18 23:32:13,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:32:13,913 INFO L93 Difference]: Finished difference Result 2528 states and 5577 transitions. [2019-12-18 23:32:13,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-18 23:32:13,914 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:32:13,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:32:13,918 INFO L225 Difference]: With dead ends: 2528 [2019-12-18 23:32:13,918 INFO L226 Difference]: Without dead ends: 2421 [2019-12-18 23:32:13,919 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=310, Invalid=1017, Unknown=9, NotChecked=70, Total=1406 [2019-12-18 23:32:13,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2019-12-18 23:32:13,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 1459. [2019-12-18 23:32:13,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1459 states. [2019-12-18 23:32:13,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 3356 transitions. [2019-12-18 23:32:13,944 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 3356 transitions. Word has length 48 [2019-12-18 23:32:13,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:32:13,944 INFO L462 AbstractCegarLoop]: Abstraction has 1459 states and 3356 transitions. [2019-12-18 23:32:13,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:32:13,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 3356 transitions. [2019-12-18 23:32:13,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:32:13,946 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:32:13,947 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:32:14,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:32:14,151 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:32:14,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:32:14,151 INFO L82 PathProgramCache]: Analyzing trace with hash 671059639, now seen corresponding path program 21 times [2019-12-18 23:32:14,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:32:14,151 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300674737] [2019-12-18 23:32:14,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:32:14,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:32:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:14,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300674737] [2019-12-18 23:32:14,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164803805] [2019-12-18 23:32:14,338 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 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 [2019-12-18 23:32:14,389 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-18 23:32:14,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:32:14,391 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:32:14,392 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:32:14,604 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:14,605 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:14,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:14,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:32:14,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:32:14,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630161381] [2019-12-18 23:32:14,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:32:14,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:32:14,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:32:14,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:32:14,622 INFO L87 Difference]: Start difference. First operand 1459 states and 3356 transitions. Second operand 20 states. [2019-12-18 23:32:15,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:32:15,454 INFO L93 Difference]: Finished difference Result 2899 states and 6356 transitions. [2019-12-18 23:32:15,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-18 23:32:15,455 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:32:15,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:32:15,458 INFO L225 Difference]: With dead ends: 2899 [2019-12-18 23:32:15,458 INFO L226 Difference]: Without dead ends: 2734 [2019-12-18 23:32:15,459 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=332, Invalid=1228, Unknown=0, NotChecked=0, Total=1560 [2019-12-18 23:32:15,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2019-12-18 23:32:15,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 1475. [2019-12-18 23:32:15,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1475 states. [2019-12-18 23:32:15,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 3396 transitions. [2019-12-18 23:32:15,478 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 3396 transitions. Word has length 48 [2019-12-18 23:32:15,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:32:15,478 INFO L462 AbstractCegarLoop]: Abstraction has 1475 states and 3396 transitions. [2019-12-18 23:32:15,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:32:15,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 3396 transitions. [2019-12-18 23:32:15,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:32:15,479 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:32:15,479 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:32:15,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:32:15,681 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:32:15,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:32:15,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1494846799, now seen corresponding path program 22 times [2019-12-18 23:32:15,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:32:15,683 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132425865] [2019-12-18 23:32:15,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:32:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:32:15,859 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:15,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132425865] [2019-12-18 23:32:15,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704157124] [2019-12-18 23:32:15,860 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 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 [2019-12-18 23:32:15,920 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:32:15,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:32:15,922 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:32:15,924 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:32:16,345 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:16,346 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:16,350 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:16,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:32:16,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:32:16,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009022393] [2019-12-18 23:32:16,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:32:16,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:32:16,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:32:16,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:32:16,369 INFO L87 Difference]: Start difference. First operand 1475 states and 3396 transitions. Second operand 20 states. [2019-12-18 23:32:17,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:32:17,421 INFO L93 Difference]: Finished difference Result 3076 states and 6731 transitions. [2019-12-18 23:32:17,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-18 23:32:17,422 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:32:17,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:32:17,424 INFO L225 Difference]: With dead ends: 3076 [2019-12-18 23:32:17,425 INFO L226 Difference]: Without dead ends: 2911 [2019-12-18 23:32:17,426 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=304, Invalid=1102, Unknown=0, NotChecked=0, Total=1406 [2019-12-18 23:32:17,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2019-12-18 23:32:17,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 1491. [2019-12-18 23:32:17,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1491 states. [2019-12-18 23:32:17,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 3436 transitions. [2019-12-18 23:32:17,446 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 3436 transitions. Word has length 48 [2019-12-18 23:32:17,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:32:17,446 INFO L462 AbstractCegarLoop]: Abstraction has 1491 states and 3436 transitions. [2019-12-18 23:32:17,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:32:17,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 3436 transitions. [2019-12-18 23:32:17,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:32:17,448 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:32:17,448 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:32:17,648 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:32:17,648 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:32:17,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:32:17,649 INFO L82 PathProgramCache]: Analyzing trace with hash 200917681, now seen corresponding path program 23 times [2019-12-18 23:32:17,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:32:17,649 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866119293] [2019-12-18 23:32:17,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:32:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:32:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:17,809 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866119293] [2019-12-18 23:32:17,809 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835381054] [2019-12-18 23:32:17,809 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 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 [2019-12-18 23:32:17,864 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-18 23:32:17,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:32:17,866 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:32:17,867 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:32:18,442 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:18,443 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:18,448 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:18,468 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:18,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:32:18,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:32:18,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294406174] [2019-12-18 23:32:18,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:32:18,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:32:18,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:32:18,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:32:18,472 INFO L87 Difference]: Start difference. First operand 1491 states and 3436 transitions. Second operand 20 states. [2019-12-18 23:32:30,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:32:30,037 INFO L93 Difference]: Finished difference Result 2879 states and 6369 transitions. [2019-12-18 23:32:30,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-18 23:32:30,038 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:32:30,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:32:30,041 INFO L225 Difference]: With dead ends: 2879 [2019-12-18 23:32:30,042 INFO L226 Difference]: Without dead ends: 2714 [2019-12-18 23:32:30,042 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=325, Invalid=1155, Unknown=2, NotChecked=0, Total=1482 [2019-12-18 23:32:30,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2019-12-18 23:32:30,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 1507. [2019-12-18 23:32:30,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1507 states. [2019-12-18 23:32:30,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 3476 transitions. [2019-12-18 23:32:30,062 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 3476 transitions. Word has length 48 [2019-12-18 23:32:30,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:32:30,062 INFO L462 AbstractCegarLoop]: Abstraction has 1507 states and 3476 transitions. [2019-12-18 23:32:30,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:32:30,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 3476 transitions. [2019-12-18 23:32:30,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:32:30,063 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:32:30,064 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:32:30,264 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:32:30,264 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:32:30,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:32:30,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1594992105, now seen corresponding path program 24 times [2019-12-18 23:32:30,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:32:30,265 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971515076] [2019-12-18 23:32:30,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:32:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:32:30,467 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:30,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971515076] [2019-12-18 23:32:30,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288789065] [2019-12-18 23:32:30,468 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 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 [2019-12-18 23:32:30,521 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-18 23:32:30,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:32:30,522 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:32:30,523 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:32:30,804 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:30,805 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:30,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:30,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:32:30,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:32:30,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618415341] [2019-12-18 23:32:30,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:32:30,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:32:30,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:32:30,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:32:30,825 INFO L87 Difference]: Start difference. First operand 1507 states and 3476 transitions. Second operand 20 states. [2019-12-18 23:32:31,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:32:31,949 INFO L93 Difference]: Finished difference Result 2891 states and 6382 transitions. [2019-12-18 23:32:31,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-18 23:32:31,950 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:32:31,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:32:31,954 INFO L225 Difference]: With dead ends: 2891 [2019-12-18 23:32:31,954 INFO L226 Difference]: Without dead ends: 2726 [2019-12-18 23:32:31,955 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=339, Invalid=1221, Unknown=0, NotChecked=0, Total=1560 [2019-12-18 23:32:31,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2019-12-18 23:32:31,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 1491. [2019-12-18 23:32:31,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1491 states. [2019-12-18 23:32:31,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 3436 transitions. [2019-12-18 23:32:31,975 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 3436 transitions. Word has length 48 [2019-12-18 23:32:31,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:32:31,975 INFO L462 AbstractCegarLoop]: Abstraction has 1491 states and 3436 transitions. [2019-12-18 23:32:31,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:32:31,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 3436 transitions. [2019-12-18 23:32:31,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:32:31,977 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:32:31,977 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:32:32,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:32:32,179 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:32:32,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:32:32,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1912643477, now seen corresponding path program 25 times [2019-12-18 23:32:32,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:32:32,180 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768276404] [2019-12-18 23:32:32,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:32:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:32:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:32,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768276404] [2019-12-18 23:32:32,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208861430] [2019-12-18 23:32:32,354 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 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 [2019-12-18 23:32:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:32:32,405 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:32:32,406 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:32:32,555 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:32,555 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:32,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:32,578 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:32,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:32:32,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:32:32,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029967574] [2019-12-18 23:32:32,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:32:32,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:32:32,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:32:32,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:32:32,579 INFO L87 Difference]: Start difference. First operand 1491 states and 3436 transitions. Second operand 20 states. [2019-12-18 23:32:33,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:32:33,354 INFO L93 Difference]: Finished difference Result 2688 states and 5979 transitions. [2019-12-18 23:32:33,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-18 23:32:33,354 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:32:33,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:32:33,358 INFO L225 Difference]: With dead ends: 2688 [2019-12-18 23:32:33,358 INFO L226 Difference]: Without dead ends: 2481 [2019-12-18 23:32:33,359 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=317, Invalid=1165, Unknown=0, NotChecked=0, Total=1482 [2019-12-18 23:32:33,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2019-12-18 23:32:33,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 1528. [2019-12-18 23:32:33,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1528 states. [2019-12-18 23:32:33,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 3511 transitions. [2019-12-18 23:32:33,377 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 3511 transitions. Word has length 48 [2019-12-18 23:32:33,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:32:33,378 INFO L462 AbstractCegarLoop]: Abstraction has 1528 states and 3511 transitions. [2019-12-18 23:32:33,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:32:33,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 3511 transitions. [2019-12-18 23:32:33,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:32:33,379 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:32:33,379 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:32:33,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:32:33,580 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:32:33,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:32:33,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1935830071, now seen corresponding path program 26 times [2019-12-18 23:32:33,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:32:33,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540257026] [2019-12-18 23:32:33,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:32:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:32:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:33,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540257026] [2019-12-18 23:32:33,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305806718] [2019-12-18 23:32:33,767 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 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 [2019-12-18 23:32:33,814 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:32:33,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:32:33,815 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:32:33,816 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:32:34,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:34,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:34,058 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:34,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:32:34,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:32:34,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970817046] [2019-12-18 23:32:34,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:32:34,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:32:34,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:32:34,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:32:34,069 INFO L87 Difference]: Start difference. First operand 1528 states and 3511 transitions. Second operand 20 states. [2019-12-18 23:32:34,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:32:34,885 INFO L93 Difference]: Finished difference Result 3057 states and 6726 transitions. [2019-12-18 23:32:34,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-18 23:32:34,885 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:32:34,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:32:34,888 INFO L225 Difference]: With dead ends: 3057 [2019-12-18 23:32:34,889 INFO L226 Difference]: Without dead ends: 2892 [2019-12-18 23:32:34,889 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=326, Invalid=1234, Unknown=0, NotChecked=0, Total=1560 [2019-12-18 23:32:34,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2019-12-18 23:32:34,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 1538. [2019-12-18 23:32:34,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1538 states. [2019-12-18 23:32:34,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 3548 transitions. [2019-12-18 23:32:34,921 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 3548 transitions. Word has length 48 [2019-12-18 23:32:34,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:32:34,921 INFO L462 AbstractCegarLoop]: Abstraction has 1538 states and 3548 transitions. [2019-12-18 23:32:34,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:32:34,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 3548 transitions. [2019-12-18 23:32:34,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:32:34,927 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:32:34,928 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:32:35,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:32:35,132 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:32:35,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:32:35,133 INFO L82 PathProgramCache]: Analyzing trace with hash 116272075, now seen corresponding path program 27 times [2019-12-18 23:32:35,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:32:35,133 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047995168] [2019-12-18 23:32:35,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:32:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:32:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:35,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047995168] [2019-12-18 23:32:35,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227490729] [2019-12-18 23:32:35,325 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 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 [2019-12-18 23:32:35,397 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 23:32:35,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:32:35,398 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:32:35,400 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:32:42,930 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:42,930 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:42,933 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:42,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:32:42,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:32:42,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569640660] [2019-12-18 23:32:42,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:32:42,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:32:42,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:32:42,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=297, Unknown=2, NotChecked=0, Total=380 [2019-12-18 23:32:42,943 INFO L87 Difference]: Start difference. First operand 1538 states and 3548 transitions. Second operand 20 states. [2019-12-18 23:32:46,001 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2019-12-18 23:32:47,278 WARN L192 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 23:32:47,539 WARN L192 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2019-12-18 23:32:53,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:32:53,043 INFO L93 Difference]: Finished difference Result 3229 states and 7106 transitions. [2019-12-18 23:32:53,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-18 23:32:53,043 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:32:53,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:32:53,047 INFO L225 Difference]: With dead ends: 3229 [2019-12-18 23:32:53,047 INFO L226 Difference]: Without dead ends: 3064 [2019-12-18 23:32:53,048 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=376, Invalid=1344, Unknown=2, NotChecked=0, Total=1722 [2019-12-18 23:32:53,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2019-12-18 23:32:53,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 1558. [2019-12-18 23:32:53,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1558 states. [2019-12-18 23:32:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 3601 transitions. [2019-12-18 23:32:53,069 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 3601 transitions. Word has length 48 [2019-12-18 23:32:53,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:32:53,069 INFO L462 AbstractCegarLoop]: Abstraction has 1558 states and 3601 transitions. [2019-12-18 23:32:53,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:32:53,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 3601 transitions. [2019-12-18 23:32:53,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:32:53,071 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:32:53,071 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:32:53,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:32:53,272 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:32:53,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:32:53,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1679637711, now seen corresponding path program 28 times [2019-12-18 23:32:53,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:32:53,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575475233] [2019-12-18 23:32:53,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:32:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:32:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:53,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575475233] [2019-12-18 23:32:53,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910584519] [2019-12-18 23:32:53,496 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:32:53,541 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:32:53,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:32:53,542 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:32:53,543 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:32:54,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:54,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:54,647 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:32:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:32:54,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:32:54,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:32:54,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971867722] [2019-12-18 23:32:54,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:32:54,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:32:54,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:32:54,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=298, Unknown=2, NotChecked=0, Total=380 [2019-12-18 23:32:54,659 INFO L87 Difference]: Start difference. First operand 1558 states and 3601 transitions. Second operand 20 states. [2019-12-18 23:32:59,273 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-12-18 23:33:01,672 WARN L192 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-18 23:33:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:01,914 INFO L93 Difference]: Finished difference Result 3158 states and 6961 transitions. [2019-12-18 23:33:01,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-18 23:33:01,914 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:01,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:01,917 INFO L225 Difference]: With dead ends: 3158 [2019-12-18 23:33:01,917 INFO L226 Difference]: Without dead ends: 2993 [2019-12-18 23:33:01,918 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=346, Invalid=1290, Unknown=4, NotChecked=0, Total=1640 [2019-12-18 23:33:01,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2019-12-18 23:33:01,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 1590. [2019-12-18 23:33:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1590 states. [2019-12-18 23:33:01,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 3681 transitions. [2019-12-18 23:33:01,938 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 3681 transitions. Word has length 48 [2019-12-18 23:33:01,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:01,938 INFO L462 AbstractCegarLoop]: Abstraction has 1590 states and 3681 transitions. [2019-12-18 23:33:01,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:01,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 3681 transitions. [2019-12-18 23:33:01,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:01,940 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:01,940 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:02,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:02,141 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:02,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:02,142 INFO L82 PathProgramCache]: Analyzing trace with hash 454674699, now seen corresponding path program 29 times [2019-12-18 23:33:02,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:02,142 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202827483] [2019-12-18 23:33:02,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:02,301 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:02,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202827483] [2019-12-18 23:33:02,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765564608] [2019-12-18 23:33:02,301 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:02,350 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-18 23:33:02,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:02,351 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:02,352 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:02,606 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:02,606 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:02,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:02,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:02,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:02,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981898025] [2019-12-18 23:33:02,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:02,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:02,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:02,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:02,630 INFO L87 Difference]: Start difference. First operand 1590 states and 3681 transitions. Second operand 20 states. [2019-12-18 23:33:04,223 WARN L192 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-12-18 23:33:04,792 WARN L192 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-12-18 23:33:05,441 WARN L192 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 22 [2019-12-18 23:33:05,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:05,901 INFO L93 Difference]: Finished difference Result 3170 states and 6981 transitions. [2019-12-18 23:33:05,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-18 23:33:05,902 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:05,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:05,906 INFO L225 Difference]: With dead ends: 3170 [2019-12-18 23:33:05,906 INFO L226 Difference]: Without dead ends: 3005 [2019-12-18 23:33:05,907 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=379, Invalid=1342, Unknown=1, NotChecked=0, Total=1722 [2019-12-18 23:33:05,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2019-12-18 23:33:05,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 1558. [2019-12-18 23:33:05,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1558 states. [2019-12-18 23:33:05,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 3601 transitions. [2019-12-18 23:33:05,930 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 3601 transitions. Word has length 48 [2019-12-18 23:33:05,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:05,930 INFO L462 AbstractCegarLoop]: Abstraction has 1558 states and 3601 transitions. [2019-12-18 23:33:05,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:05,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 3601 transitions. [2019-12-18 23:33:05,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:05,932 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:05,932 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:06,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:06,133 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:06,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:06,134 INFO L82 PathProgramCache]: Analyzing trace with hash 299465675, now seen corresponding path program 30 times [2019-12-18 23:33:06,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:06,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742247374] [2019-12-18 23:33:06,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:06,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742247374] [2019-12-18 23:33:06,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241830951] [2019-12-18 23:33:06,313 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:06,359 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-18 23:33:06,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:06,360 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:06,361 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:06,503 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:06,503 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:06,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:06,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:06,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:06,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262027919] [2019-12-18 23:33:06,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:06,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:06,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:06,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:06,519 INFO L87 Difference]: Start difference. First operand 1558 states and 3601 transitions. Second operand 20 states. [2019-12-18 23:33:07,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:07,537 INFO L93 Difference]: Finished difference Result 3420 states and 7491 transitions. [2019-12-18 23:33:07,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-18 23:33:07,538 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:07,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:07,542 INFO L225 Difference]: With dead ends: 3420 [2019-12-18 23:33:07,542 INFO L226 Difference]: Without dead ends: 3255 [2019-12-18 23:33:07,543 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=467, Invalid=1695, Unknown=0, NotChecked=0, Total=2162 [2019-12-18 23:33:07,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2019-12-18 23:33:07,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 1657. [2019-12-18 23:33:07,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1657 states. [2019-12-18 23:33:07,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 3853 transitions. [2019-12-18 23:33:07,564 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 3853 transitions. Word has length 48 [2019-12-18 23:33:07,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:07,565 INFO L462 AbstractCegarLoop]: Abstraction has 1657 states and 3853 transitions. [2019-12-18 23:33:07,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:07,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 3853 transitions. [2019-12-18 23:33:07,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:07,567 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:07,567 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:07,767 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:07,767 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:07,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:07,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1496444111, now seen corresponding path program 31 times [2019-12-18 23:33:07,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:07,769 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380378407] [2019-12-18 23:33:07,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:07,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380378407] [2019-12-18 23:33:07,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527149267] [2019-12-18 23:33:07,918 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:07,964 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:07,965 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:08,106 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:08,107 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:08,109 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:08,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:08,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:08,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827517813] [2019-12-18 23:33:08,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:08,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:08,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:08,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:08,116 INFO L87 Difference]: Start difference. First operand 1657 states and 3853 transitions. Second operand 20 states. [2019-12-18 23:33:09,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:09,204 INFO L93 Difference]: Finished difference Result 3539 states and 7814 transitions. [2019-12-18 23:33:09,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-18 23:33:09,204 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:09,208 INFO L225 Difference]: With dead ends: 3539 [2019-12-18 23:33:09,208 INFO L226 Difference]: Without dead ends: 3267 [2019-12-18 23:33:09,209 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=497, Invalid=1953, Unknown=0, NotChecked=0, Total=2450 [2019-12-18 23:33:09,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2019-12-18 23:33:09,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 1661. [2019-12-18 23:33:09,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1661 states. [2019-12-18 23:33:09,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 3859 transitions. [2019-12-18 23:33:09,239 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 3859 transitions. Word has length 48 [2019-12-18 23:33:09,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:09,240 INFO L462 AbstractCegarLoop]: Abstraction has 1661 states and 3859 transitions. [2019-12-18 23:33:09,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:09,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 3859 transitions. [2019-12-18 23:33:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:09,242 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:09,242 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:09,445 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:09,445 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:09,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:09,446 INFO L82 PathProgramCache]: Analyzing trace with hash 632616747, now seen corresponding path program 32 times [2019-12-18 23:33:09,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:09,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261337776] [2019-12-18 23:33:09,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:09,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261337776] [2019-12-18 23:33:09,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031209751] [2019-12-18 23:33:09,604 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:09,658 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:33:09,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:09,659 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:09,659 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:09,822 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:09,822 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:09,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:09,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:09,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234906281] [2019-12-18 23:33:09,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:09,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:09,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:09,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:09,829 INFO L87 Difference]: Start difference. First operand 1661 states and 3859 transitions. Second operand 20 states. [2019-12-18 23:33:10,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:10,569 INFO L93 Difference]: Finished difference Result 3292 states and 7291 transitions. [2019-12-18 23:33:10,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-18 23:33:10,570 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:10,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:10,574 INFO L225 Difference]: With dead ends: 3292 [2019-12-18 23:33:10,574 INFO L226 Difference]: Without dead ends: 3127 [2019-12-18 23:33:10,575 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=385, Invalid=1337, Unknown=0, NotChecked=0, Total=1722 [2019-12-18 23:33:10,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3127 states. [2019-12-18 23:33:10,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3127 to 1592. [2019-12-18 23:33:10,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1592 states. [2019-12-18 23:33:10,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 3683 transitions. [2019-12-18 23:33:10,596 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 3683 transitions. Word has length 48 [2019-12-18 23:33:10,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:10,596 INFO L462 AbstractCegarLoop]: Abstraction has 1592 states and 3683 transitions. [2019-12-18 23:33:10,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:10,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 3683 transitions. [2019-12-18 23:33:10,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:10,597 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:10,597 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:10,798 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:10,798 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:10,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:10,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1066108661, now seen corresponding path program 33 times [2019-12-18 23:33:10,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:10,799 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123209689] [2019-12-18 23:33:10,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:10,979 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123209689] [2019-12-18 23:33:10,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674315047] [2019-12-18 23:33:10,980 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:11,024 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 23:33:11,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:11,025 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:11,026 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:13,005 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:13,005 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:13,007 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:13,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:13,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:13,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118941354] [2019-12-18 23:33:13,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:13,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:13,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:13,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:13,015 INFO L87 Difference]: Start difference. First operand 1592 states and 3683 transitions. Second operand 20 states. [2019-12-18 23:33:13,801 WARN L192 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2019-12-18 23:33:16,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:16,596 INFO L93 Difference]: Finished difference Result 3407 states and 7435 transitions. [2019-12-18 23:33:16,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-18 23:33:16,596 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:16,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:16,601 INFO L225 Difference]: With dead ends: 3407 [2019-12-18 23:33:16,601 INFO L226 Difference]: Without dead ends: 3242 [2019-12-18 23:33:16,602 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=471, Invalid=1689, Unknown=2, NotChecked=0, Total=2162 [2019-12-18 23:33:16,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2019-12-18 23:33:16,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 1588. [2019-12-18 23:33:16,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1588 states. [2019-12-18 23:33:16,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 3670 transitions. [2019-12-18 23:33:16,634 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 3670 transitions. Word has length 48 [2019-12-18 23:33:16,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:16,635 INFO L462 AbstractCegarLoop]: Abstraction has 1588 states and 3670 transitions. [2019-12-18 23:33:16,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:16,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 3670 transitions. [2019-12-18 23:33:16,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:16,637 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:16,638 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:16,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:16,841 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:16,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:16,842 INFO L82 PathProgramCache]: Analyzing trace with hash -274584927, now seen corresponding path program 34 times [2019-12-18 23:33:16,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:16,843 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769539658] [2019-12-18 23:33:16,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:17,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769539658] [2019-12-18 23:33:17,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776596828] [2019-12-18 23:33:17,011 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:17,068 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:33:17,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:17,069 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:17,070 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:17,218 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:17,219 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:17,221 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:17,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:17,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:17,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881044245] [2019-12-18 23:33:17,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:17,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:17,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:17,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:17,228 INFO L87 Difference]: Start difference. First operand 1588 states and 3670 transitions. Second operand 20 states. [2019-12-18 23:33:18,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:18,203 INFO L93 Difference]: Finished difference Result 3086 states and 6780 transitions. [2019-12-18 23:33:18,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-18 23:33:18,204 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:18,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:18,207 INFO L225 Difference]: With dead ends: 3086 [2019-12-18 23:33:18,208 INFO L226 Difference]: Without dead ends: 2921 [2019-12-18 23:33:18,208 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=431, Invalid=1549, Unknown=0, NotChecked=0, Total=1980 [2019-12-18 23:33:18,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2019-12-18 23:33:18,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 1619. [2019-12-18 23:33:18,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1619 states. [2019-12-18 23:33:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 3761 transitions. [2019-12-18 23:33:18,230 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 3761 transitions. Word has length 48 [2019-12-18 23:33:18,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:18,230 INFO L462 AbstractCegarLoop]: Abstraction has 1619 states and 3761 transitions. [2019-12-18 23:33:18,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:18,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 3761 transitions. [2019-12-18 23:33:18,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:18,232 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:18,232 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:18,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:18,434 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:18,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:18,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1561521155, now seen corresponding path program 5 times [2019-12-18 23:33:18,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:18,435 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901593213] [2019-12-18 23:33:18,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:18,679 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901593213] [2019-12-18 23:33:18,679 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110298862] [2019-12-18 23:33:18,680 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:18,753 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-12-18 23:33:18,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:18,755 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:18,757 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:19,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:19,066 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:19,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:19,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:19,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176581125] [2019-12-18 23:33:19,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:19,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:19,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:19,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:19,078 INFO L87 Difference]: Start difference. First operand 1619 states and 3761 transitions. Second operand 20 states. [2019-12-18 23:33:20,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:20,148 INFO L93 Difference]: Finished difference Result 3171 states and 7048 transitions. [2019-12-18 23:33:20,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-18 23:33:20,148 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:20,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:20,151 INFO L225 Difference]: With dead ends: 3171 [2019-12-18 23:33:20,151 INFO L226 Difference]: Without dead ends: 2841 [2019-12-18 23:33:20,152 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=466, Invalid=1790, Unknown=0, NotChecked=0, Total=2256 [2019-12-18 23:33:20,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2019-12-18 23:33:20,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 1703. [2019-12-18 23:33:20,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1703 states. [2019-12-18 23:33:20,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 3915 transitions. [2019-12-18 23:33:20,174 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 3915 transitions. Word has length 48 [2019-12-18 23:33:20,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:20,174 INFO L462 AbstractCegarLoop]: Abstraction has 1703 states and 3915 transitions. [2019-12-18 23:33:20,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:20,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 3915 transitions. [2019-12-18 23:33:20,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:20,176 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:20,176 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:20,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:20,377 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:20,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:20,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1291469803, now seen corresponding path program 35 times [2019-12-18 23:33:20,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:20,378 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277875901] [2019-12-18 23:33:20,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:20,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277875901] [2019-12-18 23:33:20,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077887326] [2019-12-18 23:33:20,625 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 [2019-12-18 23:33:20,700 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-18 23:33:20,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:20,702 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:20,703 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:21,005 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:21,005 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:21,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:21,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:21,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:21,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997825731] [2019-12-18 23:33:21,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:21,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:21,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:21,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:21,026 INFO L87 Difference]: Start difference. First operand 1703 states and 3915 transitions. Second operand 20 states. [2019-12-18 23:33:21,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:21,738 INFO L93 Difference]: Finished difference Result 2917 states and 6471 transitions. [2019-12-18 23:33:21,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 23:33:21,739 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:21,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:21,743 INFO L225 Difference]: With dead ends: 2917 [2019-12-18 23:33:21,743 INFO L226 Difference]: Without dead ends: 2752 [2019-12-18 23:33:21,744 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2019-12-18 23:33:21,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2019-12-18 23:33:21,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 1721. [2019-12-18 23:33:21,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1721 states. [2019-12-18 23:33:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 3945 transitions. [2019-12-18 23:33:21,765 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 3945 transitions. Word has length 48 [2019-12-18 23:33:21,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:21,765 INFO L462 AbstractCegarLoop]: Abstraction has 1721 states and 3945 transitions. [2019-12-18 23:33:21,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:21,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 3945 transitions. [2019-12-18 23:33:21,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:21,767 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:21,767 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:21,967 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:21,968 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:21,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:21,969 INFO L82 PathProgramCache]: Analyzing trace with hash -874436635, now seen corresponding path program 36 times [2019-12-18 23:33:21,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:21,969 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039995394] [2019-12-18 23:33:21,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:22,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039995394] [2019-12-18 23:33:22,133 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736074498] [2019-12-18 23:33:22,133 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 [2019-12-18 23:33:22,186 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-18 23:33:22,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:22,187 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:22,188 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:23,076 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:23,076 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:23,079 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:23,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:23,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:23,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141247715] [2019-12-18 23:33:23,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:23,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:23,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:23,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=300, Unknown=1, NotChecked=0, Total=380 [2019-12-18 23:33:23,087 INFO L87 Difference]: Start difference. First operand 1721 states and 3945 transitions. Second operand 20 states. [2019-12-18 23:33:24,816 WARN L192 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2019-12-18 23:33:25,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:25,543 INFO L93 Difference]: Finished difference Result 3134 states and 6886 transitions. [2019-12-18 23:33:25,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-18 23:33:25,543 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:25,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:25,547 INFO L225 Difference]: With dead ends: 3134 [2019-12-18 23:33:25,547 INFO L226 Difference]: Without dead ends: 2969 [2019-12-18 23:33:25,547 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=280, Invalid=1051, Unknown=1, NotChecked=0, Total=1332 [2019-12-18 23:33:25,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2969 states. [2019-12-18 23:33:25,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2969 to 1717. [2019-12-18 23:33:25,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1717 states. [2019-12-18 23:33:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 3932 transitions. [2019-12-18 23:33:25,569 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 3932 transitions. Word has length 48 [2019-12-18 23:33:25,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:25,569 INFO L462 AbstractCegarLoop]: Abstraction has 1717 states and 3932 transitions. [2019-12-18 23:33:25,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:25,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 3932 transitions. [2019-12-18 23:33:25,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:25,572 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:25,572 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:25,775 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:25,775 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:25,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:25,775 INFO L82 PathProgramCache]: Analyzing trace with hash 558027697, now seen corresponding path program 37 times [2019-12-18 23:33:25,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:25,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438551246] [2019-12-18 23:33:25,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:26,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438551246] [2019-12-18 23:33:26,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315691705] [2019-12-18 23:33:26,048 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 [2019-12-18 23:33:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:26,132 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:26,135 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:26,685 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:26,685 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:26,689 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:26,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:26,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:26,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62682803] [2019-12-18 23:33:26,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:26,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:26,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:26,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:26,712 INFO L87 Difference]: Start difference. First operand 1717 states and 3932 transitions. Second operand 20 states. [2019-12-18 23:33:28,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:28,881 INFO L93 Difference]: Finished difference Result 3420 states and 7430 transitions. [2019-12-18 23:33:28,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-18 23:33:28,881 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:28,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:28,886 INFO L225 Difference]: With dead ends: 3420 [2019-12-18 23:33:28,886 INFO L226 Difference]: Without dead ends: 3255 [2019-12-18 23:33:28,887 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=364, Invalid=1358, Unknown=0, NotChecked=0, Total=1722 [2019-12-18 23:33:28,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2019-12-18 23:33:28,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 1701. [2019-12-18 23:33:28,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1701 states. [2019-12-18 23:33:28,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 3892 transitions. [2019-12-18 23:33:28,919 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 3892 transitions. Word has length 48 [2019-12-18 23:33:28,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:28,919 INFO L462 AbstractCegarLoop]: Abstraction has 1701 states and 3892 transitions. [2019-12-18 23:33:28,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:28,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 3892 transitions. [2019-12-18 23:33:28,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:28,922 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:28,922 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:29,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:29,126 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:29,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:29,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1181621435, now seen corresponding path program 38 times [2019-12-18 23:33:29,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:29,127 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436282674] [2019-12-18 23:33:29,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:29,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436282674] [2019-12-18 23:33:29,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300061200] [2019-12-18 23:33:29,323 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 [2019-12-18 23:33:29,369 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:33:29,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:29,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:29,370 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:29,578 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:29,579 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:29,582 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:29,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:29,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:29,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603553470] [2019-12-18 23:33:29,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:29,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:29,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:29,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:29,592 INFO L87 Difference]: Start difference. First operand 1701 states and 3892 transitions. Second operand 20 states. [2019-12-18 23:33:30,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:30,444 INFO L93 Difference]: Finished difference Result 3417 states and 7498 transitions. [2019-12-18 23:33:30,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-18 23:33:30,445 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:30,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:30,450 INFO L225 Difference]: With dead ends: 3417 [2019-12-18 23:33:30,450 INFO L226 Difference]: Without dead ends: 3252 [2019-12-18 23:33:30,450 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=396, Invalid=1410, Unknown=0, NotChecked=0, Total=1806 [2019-12-18 23:33:30,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3252 states. [2019-12-18 23:33:30,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3252 to 1733. [2019-12-18 23:33:30,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1733 states. [2019-12-18 23:33:30,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 3972 transitions. [2019-12-18 23:33:30,479 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 3972 transitions. Word has length 48 [2019-12-18 23:33:30,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:30,479 INFO L462 AbstractCegarLoop]: Abstraction has 1733 states and 3972 transitions. [2019-12-18 23:33:30,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:30,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 3972 transitions. [2019-12-18 23:33:30,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:30,481 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:30,481 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:30,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:30,684 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:30,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:30,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1317436075, now seen corresponding path program 39 times [2019-12-18 23:33:30,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:30,685 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081808347] [2019-12-18 23:33:30,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:30,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081808347] [2019-12-18 23:33:30,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040348766] [2019-12-18 23:33:30,898 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 [2019-12-18 23:33:30,966 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-18 23:33:30,966 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:30,967 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:30,969 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:31,159 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:31,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:31,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:31,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:31,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255808744] [2019-12-18 23:33:31,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:31,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:31,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:31,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:31,171 INFO L87 Difference]: Start difference. First operand 1733 states and 3972 transitions. Second operand 20 states. [2019-12-18 23:33:31,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:31,982 INFO L93 Difference]: Finished difference Result 3541 states and 7798 transitions. [2019-12-18 23:33:31,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-18 23:33:31,983 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:31,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:31,988 INFO L225 Difference]: With dead ends: 3541 [2019-12-18 23:33:31,988 INFO L226 Difference]: Without dead ends: 3376 [2019-12-18 23:33:31,988 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=392, Invalid=1414, Unknown=0, NotChecked=0, Total=1806 [2019-12-18 23:33:31,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2019-12-18 23:33:32,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 1701. [2019-12-18 23:33:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1701 states. [2019-12-18 23:33:32,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 3892 transitions. [2019-12-18 23:33:32,011 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 3892 transitions. Word has length 48 [2019-12-18 23:33:32,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:32,011 INFO L462 AbstractCegarLoop]: Abstraction has 1701 states and 3892 transitions. [2019-12-18 23:33:32,011 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:32,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 3892 transitions. [2019-12-18 23:33:32,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:32,014 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:32,014 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:32,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:32,217 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:32,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:32,217 INFO L82 PathProgramCache]: Analyzing trace with hash -843218811, now seen corresponding path program 40 times [2019-12-18 23:33:32,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:32,218 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668462857] [2019-12-18 23:33:32,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:32,371 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668462857] [2019-12-18 23:33:32,371 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2517231] [2019-12-18 23:33:32,371 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 [2019-12-18 23:33:32,418 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:33:32,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:32,419 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:32,420 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:32,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:32,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:32,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:32,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:32,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:32,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334134931] [2019-12-18 23:33:32,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:32,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:32,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:32,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:32,619 INFO L87 Difference]: Start difference. First operand 1701 states and 3892 transitions. Second operand 20 states. [2019-12-18 23:33:33,274 WARN L192 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2019-12-18 23:33:33,911 WARN L192 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2019-12-18 23:33:34,797 WARN L192 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 20 [2019-12-18 23:33:35,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:35,055 INFO L93 Difference]: Finished difference Result 3385 states and 7458 transitions. [2019-12-18 23:33:35,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-18 23:33:35,056 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:35,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:35,060 INFO L225 Difference]: With dead ends: 3385 [2019-12-18 23:33:35,061 INFO L226 Difference]: Without dead ends: 3220 [2019-12-18 23:33:35,061 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=424, Invalid=1468, Unknown=0, NotChecked=0, Total=1892 [2019-12-18 23:33:35,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2019-12-18 23:33:35,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 1685. [2019-12-18 23:33:35,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1685 states. [2019-12-18 23:33:35,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 3852 transitions. [2019-12-18 23:33:35,083 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 3852 transitions. Word has length 48 [2019-12-18 23:33:35,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:35,083 INFO L462 AbstractCegarLoop]: Abstraction has 1685 states and 3852 transitions. [2019-12-18 23:33:35,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:35,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 3852 transitions. [2019-12-18 23:33:35,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-18 23:33:35,085 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:35,086 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:35,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:35,286 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:35,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:35,287 INFO L82 PathProgramCache]: Analyzing trace with hash -396328719, now seen corresponding path program 41 times [2019-12-18 23:33:35,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:35,287 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124837269] [2019-12-18 23:33:35,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:35,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124837269] [2019-12-18 23:33:35,493 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275864773] [2019-12-18 23:33:35,494 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 [2019-12-18 23:33:35,542 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-12-18 23:33:35,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:35,543 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:33:35,544 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:35,837 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:35,838 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:35,840 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:35,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:35,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-12-18 23:33:35,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318285574] [2019-12-18 23:33:35,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:33:35,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:35,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:33:35,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:33:35,851 INFO L87 Difference]: Start difference. First operand 1685 states and 3852 transitions. Second operand 20 states. [2019-12-18 23:33:36,440 WARN L192 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2019-12-18 23:33:36,897 WARN L192 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2019-12-18 23:33:37,740 WARN L192 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2019-12-18 23:33:38,372 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-12-18 23:33:38,992 WARN L192 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2019-12-18 23:33:40,317 WARN L192 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2019-12-18 23:33:42,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:42,241 INFO L93 Difference]: Finished difference Result 3517 states and 7645 transitions. [2019-12-18 23:33:42,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-18 23:33:42,242 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2019-12-18 23:33:42,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:42,247 INFO L225 Difference]: With dead ends: 3517 [2019-12-18 23:33:42,247 INFO L226 Difference]: Without dead ends: 3352 [2019-12-18 23:33:42,247 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=469, Invalid=1693, Unknown=0, NotChecked=0, Total=2162 [2019-12-18 23:33:42,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2019-12-18 23:33:42,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 1653. [2019-12-18 23:33:42,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1653 states. [2019-12-18 23:33:42,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 3772 transitions. [2019-12-18 23:33:42,270 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 3772 transitions. Word has length 48 [2019-12-18 23:33:42,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:42,270 INFO L462 AbstractCegarLoop]: Abstraction has 1653 states and 3772 transitions. [2019-12-18 23:33:42,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:33:42,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 3772 transitions. [2019-12-18 23:33:42,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-18 23:33:42,272 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:42,272 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:42,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:42,473 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:42,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:42,473 INFO L82 PathProgramCache]: Analyzing trace with hash -835250412, now seen corresponding path program 42 times [2019-12-18 23:33:42,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:42,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947002986] [2019-12-18 23:33:42,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:42,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947002986] [2019-12-18 23:33:42,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369264953] [2019-12-18 23:33:42,668 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 [2019-12-18 23:33:42,734 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-18 23:33:42,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:33:42,736 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 23:33:42,737 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:43,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:43,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:43,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:43,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:43,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2019-12-18 23:33:43,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242474031] [2019-12-18 23:33:43,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 23:33:43,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:43,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 23:33:43,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2019-12-18 23:33:43,674 INFO L87 Difference]: Start difference. First operand 1653 states and 3772 transitions. Second operand 22 states. [2019-12-18 23:33:44,662 WARN L192 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2019-12-18 23:33:46,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:33:46,780 INFO L93 Difference]: Finished difference Result 3563 states and 7768 transitions. [2019-12-18 23:33:46,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-18 23:33:46,781 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2019-12-18 23:33:46,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:33:46,786 INFO L225 Difference]: With dead ends: 3563 [2019-12-18 23:33:46,786 INFO L226 Difference]: Without dead ends: 3398 [2019-12-18 23:33:46,786 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=397, Invalid=1493, Unknown=2, NotChecked=0, Total=1892 [2019-12-18 23:33:46,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3398 states. [2019-12-18 23:33:46,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3398 to 1705. [2019-12-18 23:33:46,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1705 states. [2019-12-18 23:33:46,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 3905 transitions. [2019-12-18 23:33:46,809 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 3905 transitions. Word has length 52 [2019-12-18 23:33:46,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:33:46,809 INFO L462 AbstractCegarLoop]: Abstraction has 1705 states and 3905 transitions. [2019-12-18 23:33:46,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 23:33:46,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 3905 transitions. [2019-12-18 23:33:46,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-18 23:33:46,811 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:33:46,811 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:33:47,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:33:47,015 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:33:47,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:33:47,015 INFO L82 PathProgramCache]: Analyzing trace with hash -502099340, now seen corresponding path program 43 times [2019-12-18 23:33:47,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:33:47,016 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257495076] [2019-12-18 23:33:47,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:33:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:47,241 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257495076] [2019-12-18 23:33:47,241 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471132993] [2019-12-18 23:33:47,241 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 [2019-12-18 23:33:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:33:47,290 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 23:33:47,290 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:33:54,382 WARN L192 SmtUtils]: Spent 607.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-12-18 23:33:54,383 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:54,384 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:54,385 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:33:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:33:54,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:33:54,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2019-12-18 23:33:54,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397048691] [2019-12-18 23:33:54,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 23:33:54,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:33:54,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 23:33:54,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=362, Unknown=1, NotChecked=0, Total=462 [2019-12-18 23:33:54,397 INFO L87 Difference]: Start difference. First operand 1705 states and 3905 transitions. Second operand 22 states. [2019-12-18 23:33:55,974 WARN L192 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2019-12-18 23:33:57,671 WARN L192 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2019-12-18 23:33:58,293 WARN L192 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2019-12-18 23:33:59,764 WARN L192 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 20 [2019-12-18 23:34:00,732 WARN L192 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2019-12-18 23:34:03,212 WARN L192 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-12-18 23:34:04,665 WARN L192 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2019-12-18 23:34:05,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:34:05,902 INFO L93 Difference]: Finished difference Result 3747 states and 8088 transitions. [2019-12-18 23:34:05,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-18 23:34:05,902 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2019-12-18 23:34:05,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:34:05,908 INFO L225 Difference]: With dead ends: 3747 [2019-12-18 23:34:05,908 INFO L226 Difference]: Without dead ends: 3582 [2019-12-18 23:34:05,908 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=439, Invalid=1537, Unknown=4, NotChecked=0, Total=1980 [2019-12-18 23:34:05,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3582 states. [2019-12-18 23:34:05,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3582 to 1769. [2019-12-18 23:34:05,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1769 states. [2019-12-18 23:34:05,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 4065 transitions. [2019-12-18 23:34:05,931 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 4065 transitions. Word has length 52 [2019-12-18 23:34:05,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:34:05,932 INFO L462 AbstractCegarLoop]: Abstraction has 1769 states and 4065 transitions. [2019-12-18 23:34:05,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 23:34:05,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 4065 transitions. [2019-12-18 23:34:05,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-18 23:34:05,934 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:34:05,934 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:34:06,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:34:06,137 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:34:06,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:34:06,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1193665140, now seen corresponding path program 44 times [2019-12-18 23:34:06,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:34:06,138 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296276012] [2019-12-18 23:34:06,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:34:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:34:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:06,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296276012] [2019-12-18 23:34:06,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184286685] [2019-12-18 23:34:06,318 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 [2019-12-18 23:34:06,363 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:34:06,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:34:06,365 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 23:34:06,366 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:34:07,929 WARN L192 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2019-12-18 23:34:09,551 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-12-18 23:34:16,011 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:16,011 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:16,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:16,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:34:16,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2019-12-18 23:34:16,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233319136] [2019-12-18 23:34:16,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 23:34:16,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:34:16,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 23:34:16,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=363, Unknown=2, NotChecked=0, Total=462 [2019-12-18 23:34:16,024 INFO L87 Difference]: Start difference. First operand 1769 states and 4065 transitions. Second operand 22 states. [2019-12-18 23:34:16,522 WARN L192 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2019-12-18 23:34:20,118 WARN L192 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2019-12-18 23:34:21,349 WARN L192 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2019-12-18 23:34:25,761 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-12-18 23:34:26,032 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2019-12-18 23:34:30,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:34:30,966 INFO L93 Difference]: Finished difference Result 3627 states and 7895 transitions. [2019-12-18 23:34:30,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-18 23:34:30,966 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2019-12-18 23:34:30,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:34:30,971 INFO L225 Difference]: With dead ends: 3627 [2019-12-18 23:34:30,971 INFO L226 Difference]: Without dead ends: 3462 [2019-12-18 23:34:30,972 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=424, Invalid=1553, Unknown=3, NotChecked=0, Total=1980 [2019-12-18 23:34:30,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3462 states. [2019-12-18 23:34:30,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3462 to 1801. [2019-12-18 23:34:30,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1801 states. [2019-12-18 23:34:30,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 4145 transitions. [2019-12-18 23:34:30,993 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 4145 transitions. Word has length 52 [2019-12-18 23:34:30,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:34:30,994 INFO L462 AbstractCegarLoop]: Abstraction has 1801 states and 4145 transitions. [2019-12-18 23:34:30,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 23:34:30,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 4145 transitions. [2019-12-18 23:34:30,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-18 23:34:30,995 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:34:30,996 INFO L411 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:34:31,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:34:31,196 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:34:31,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:34:31,197 INFO L82 PathProgramCache]: Analyzing trace with hash -2058619834, now seen corresponding path program 6 times [2019-12-18 23:34:31,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:34:31,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566419142] [2019-12-18 23:34:31,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:34:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:34:31,341 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:31,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566419142] [2019-12-18 23:34:31,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475453982] [2019-12-18 23:34:31,342 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 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 [2019-12-18 23:34:31,398 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-12-18 23:34:31,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:34:31,399 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:34:31,401 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:34:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:31,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-18 23:34:31,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [15] total 17 [2019-12-18 23:34:31,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369074487] [2019-12-18 23:34:31,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-18 23:34:31,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:34:31,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-18 23:34:31,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2019-12-18 23:34:31,434 INFO L87 Difference]: Start difference. First operand 1801 states and 4145 transitions. Second operand 15 states. [2019-12-18 23:34:31,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:34:31,710 INFO L93 Difference]: Finished difference Result 3051 states and 7299 transitions. [2019-12-18 23:34:31,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 23:34:31,710 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2019-12-18 23:34:31,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:34:31,712 INFO L225 Difference]: With dead ends: 3051 [2019-12-18 23:34:31,712 INFO L226 Difference]: Without dead ends: 2781 [2019-12-18 23:34:31,713 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=249, Invalid=563, Unknown=0, NotChecked=0, Total=812 [2019-12-18 23:34:31,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2019-12-18 23:34:31,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 2701. [2019-12-18 23:34:31,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2701 states. [2019-12-18 23:34:31,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 6531 transitions. [2019-12-18 23:34:31,735 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 6531 transitions. Word has length 52 [2019-12-18 23:34:31,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:34:31,735 INFO L462 AbstractCegarLoop]: Abstraction has 2701 states and 6531 transitions. [2019-12-18 23:34:31,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-18 23:34:31,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 6531 transitions. [2019-12-18 23:34:31,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-18 23:34:31,738 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:34:31,738 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:34:31,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:34:31,939 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:34:31,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:34:31,940 INFO L82 PathProgramCache]: Analyzing trace with hash -586744946, now seen corresponding path program 45 times [2019-12-18 23:34:31,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:34:31,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860034904] [2019-12-18 23:34:31,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:34:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:34:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:32,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860034904] [2019-12-18 23:34:32,211 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165650165] [2019-12-18 23:34:32,211 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 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 [2019-12-18 23:34:32,288 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-18 23:34:32,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:34:32,290 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 23:34:32,292 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:34:32,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:32,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:32,698 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:32,714 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:32,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:34:32,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2019-12-18 23:34:32,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677993378] [2019-12-18 23:34:32,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 23:34:32,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:34:32,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 23:34:32,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2019-12-18 23:34:32,716 INFO L87 Difference]: Start difference. First operand 2701 states and 6531 transitions. Second operand 22 states. [2019-12-18 23:34:33,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:34:33,920 INFO L93 Difference]: Finished difference Result 5186 states and 11782 transitions. [2019-12-18 23:34:33,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-18 23:34:33,920 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2019-12-18 23:34:33,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:34:33,925 INFO L225 Difference]: With dead ends: 5186 [2019-12-18 23:34:33,925 INFO L226 Difference]: Without dead ends: 4825 [2019-12-18 23:34:33,926 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=371, Invalid=1351, Unknown=0, NotChecked=0, Total=1722 [2019-12-18 23:34:33,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4825 states. [2019-12-18 23:34:33,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4825 to 2765. [2019-12-18 23:34:33,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2765 states. [2019-12-18 23:34:33,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2765 states to 2765 states and 6691 transitions. [2019-12-18 23:34:33,980 INFO L78 Accepts]: Start accepts. Automaton has 2765 states and 6691 transitions. Word has length 52 [2019-12-18 23:34:33,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:34:33,980 INFO L462 AbstractCegarLoop]: Abstraction has 2765 states and 6691 transitions. [2019-12-18 23:34:33,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 23:34:33,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2765 states and 6691 transitions. [2019-12-18 23:34:33,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-18 23:34:33,983 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:34:33,983 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:34:34,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:34:34,183 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:34:34,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:34:34,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1109019534, now seen corresponding path program 46 times [2019-12-18 23:34:34,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:34:34,185 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736443108] [2019-12-18 23:34:34,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:34:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:34:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:34,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736443108] [2019-12-18 23:34:34,373 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454240614] [2019-12-18 23:34:34,373 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 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 [2019-12-18 23:34:34,420 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:34:34,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:34:34,421 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 23:34:34,422 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:34:38,855 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:38,855 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:38,858 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:34:38,869 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:38,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:34:38,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2019-12-18 23:34:38,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467710838] [2019-12-18 23:34:38,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 23:34:38,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:34:38,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 23:34:38,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=364, Unknown=1, NotChecked=0, Total=462 [2019-12-18 23:34:38,870 INFO L87 Difference]: Start difference. First operand 2765 states and 6691 transitions. Second operand 22 states. [2019-12-18 23:34:49,784 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2019-12-18 23:34:56,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:34:56,886 INFO L93 Difference]: Finished difference Result 5310 states and 12054 transitions. [2019-12-18 23:34:56,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-18 23:34:56,887 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2019-12-18 23:34:56,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:34:56,891 INFO L225 Difference]: With dead ends: 5310 [2019-12-18 23:34:56,891 INFO L226 Difference]: Without dead ends: 4949 [2019-12-18 23:34:56,891 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=377, Invalid=1338, Unknown=7, NotChecked=0, Total=1722 [2019-12-18 23:34:56,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4949 states. [2019-12-18 23:34:56,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4949 to 2829. [2019-12-18 23:34:56,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2829 states. [2019-12-18 23:34:56,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2829 states to 2829 states and 6851 transitions. [2019-12-18 23:34:56,925 INFO L78 Accepts]: Start accepts. Automaton has 2829 states and 6851 transitions. Word has length 52 [2019-12-18 23:34:56,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:34:56,925 INFO L462 AbstractCegarLoop]: Abstraction has 2829 states and 6851 transitions. [2019-12-18 23:34:56,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 23:34:56,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2829 states and 6851 transitions. [2019-12-18 23:34:56,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-18 23:34:56,928 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:34:56,928 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:34:57,128 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:34:57,129 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:34:57,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:34:57,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1447422158, now seen corresponding path program 47 times [2019-12-18 23:34:57,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:34:57,130 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428250792] [2019-12-18 23:34:57,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:34:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:34:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:34:57,357 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428250792] [2019-12-18 23:34:57,357 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594660465] [2019-12-18 23:34:57,357 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 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 [2019-12-18 23:34:57,407 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-18 23:34:57,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:34:57,409 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 23:34:57,410 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:35:02,011 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:35:02,012 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:35:02,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:35:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:35:02,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:35:02,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2019-12-18 23:35:02,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606124455] [2019-12-18 23:35:02,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 23:35:02,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:35:02,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 23:35:02,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2019-12-18 23:35:02,026 INFO L87 Difference]: Start difference. First operand 2829 states and 6851 transitions. Second operand 22 states. [2019-12-18 23:35:07,493 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2019-12-18 23:35:11,050 WARN L192 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2019-12-18 23:35:17,848 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-12-18 23:35:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:35:22,536 INFO L93 Difference]: Finished difference Result 5426 states and 12265 transitions. [2019-12-18 23:35:22,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-18 23:35:22,536 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2019-12-18 23:35:22,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:35:22,541 INFO L225 Difference]: With dead ends: 5426 [2019-12-18 23:35:22,542 INFO L226 Difference]: Without dead ends: 4973 [2019-12-18 23:35:22,542 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=383, Invalid=1338, Unknown=1, NotChecked=0, Total=1722 [2019-12-18 23:35:22,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4973 states. [2019-12-18 23:35:22,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4973 to 2877. [2019-12-18 23:35:22,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2877 states. [2019-12-18 23:35:22,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 6959 transitions. [2019-12-18 23:35:22,576 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 6959 transitions. Word has length 52 [2019-12-18 23:35:22,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:35:22,576 INFO L462 AbstractCegarLoop]: Abstraction has 2877 states and 6959 transitions. [2019-12-18 23:35:22,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 23:35:22,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 6959 transitions. [2019-12-18 23:35:22,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-18 23:35:22,580 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:35:22,580 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:35:22,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:35:22,780 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:35:22,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:35:22,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1625364206, now seen corresponding path program 48 times [2019-12-18 23:35:22,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:35:22,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434744545] [2019-12-18 23:35:22,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:35:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:35:23,038 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:35:23,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434744545] [2019-12-18 23:35:23,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616829284] [2019-12-18 23:35:23,039 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 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 [2019-12-18 23:35:23,115 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-18 23:35:23,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:35:23,117 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 23:35:23,119 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:35:23,701 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:35:23,702 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:35:23,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:35:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:35:23,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:35:23,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2019-12-18 23:35:23,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637137013] [2019-12-18 23:35:23,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 23:35:23,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:35:23,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 23:35:23,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2019-12-18 23:35:23,716 INFO L87 Difference]: Start difference. First operand 2877 states and 6959 transitions. Second operand 22 states. [2019-12-18 23:35:25,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:35:25,490 INFO L93 Difference]: Finished difference Result 4902 states and 11252 transitions. [2019-12-18 23:35:25,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-18 23:35:25,490 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2019-12-18 23:35:25,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:35:25,495 INFO L225 Difference]: With dead ends: 4902 [2019-12-18 23:35:25,495 INFO L226 Difference]: Without dead ends: 4553 [2019-12-18 23:35:25,496 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=354, Invalid=1206, Unknown=0, NotChecked=0, Total=1560 [2019-12-18 23:35:25,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4553 states. [2019-12-18 23:35:25,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4553 to 2877. [2019-12-18 23:35:25,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2877 states. [2019-12-18 23:35:25,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 6959 transitions. [2019-12-18 23:35:25,531 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 6959 transitions. Word has length 52 [2019-12-18 23:35:25,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:35:25,531 INFO L462 AbstractCegarLoop]: Abstraction has 2877 states and 6959 transitions. [2019-12-18 23:35:25,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 23:35:25,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 6959 transitions. [2019-12-18 23:35:25,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-12-18 23:35:25,534 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:35:25,535 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:35:25,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:35:25,737 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:35:25,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:35:25,738 INFO L82 PathProgramCache]: Analyzing trace with hash 718162532, now seen corresponding path program 49 times [2019-12-18 23:35:25,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:35:25,738 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141106724] [2019-12-18 23:35:25,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:35:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:35:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:35:25,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141106724] [2019-12-18 23:35:25,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818510018] [2019-12-18 23:35:25,920 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 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 [2019-12-18 23:35:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:35:25,968 INFO L264 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 23:35:25,969 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:35:30,426 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:35:30,427 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:35:30,429 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-18 23:35:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:35:30,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:35:30,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2019-12-18 23:35:30,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572299125] [2019-12-18 23:35:30,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 23:35:30,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:35:30,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 23:35:30,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2019-12-18 23:35:30,441 INFO L87 Difference]: Start difference. First operand 2877 states and 6959 transitions. Second operand 22 states. [2019-12-18 23:35:32,709 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 47 DAG size of output: 26 Received shutdown request... [2019-12-18 23:35:42,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 23:35:42,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:35:42,856 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-18 23:35:42,862 WARN L227 ceAbstractionStarter]: Timeout [2019-12-18 23:35:42,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 11:35:42 BasicIcfg [2019-12-18 23:35:42,863 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-18 23:35:42,864 INFO L168 Benchmark]: Toolchain (without parser) took 272270.48 ms. Allocated memory was 146.8 MB in the beginning and 342.9 MB in the end (delta: 196.1 MB). Free memory was 101.9 MB in the beginning and 228.5 MB in the end (delta: -126.5 MB). Peak memory consumption was 69.5 MB. Max. memory is 7.1 GB. [2019-12-18 23:35:42,864 INFO L168 Benchmark]: CDTParser took 0.45 ms. Allocated memory is still 146.8 MB. Free memory is still 121.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-12-18 23:35:42,865 INFO L168 Benchmark]: CACSL2BoogieTranslator took 658.17 ms. Allocated memory was 146.8 MB in the beginning and 205.5 MB in the end (delta: 58.7 MB). Free memory was 101.9 MB in the beginning and 165.0 MB in the end (delta: -63.1 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2019-12-18 23:35:42,865 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.01 ms. Allocated memory is still 205.5 MB. Free memory was 165.0 MB in the beginning and 162.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2019-12-18 23:35:42,865 INFO L168 Benchmark]: Boogie Preprocessor took 26.49 ms. Allocated memory is still 205.5 MB. Free memory was 162.2 MB in the beginning and 161.3 MB in the end (delta: 933.9 kB). Peak memory consumption was 933.9 kB. Max. memory is 7.1 GB. [2019-12-18 23:35:42,866 INFO L168 Benchmark]: RCFGBuilder took 413.53 ms. Allocated memory is still 205.5 MB. Free memory was 161.3 MB in the beginning and 141.3 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2019-12-18 23:35:42,866 INFO L168 Benchmark]: TraceAbstraction took 271123.96 ms. Allocated memory was 205.5 MB in the beginning and 342.9 MB in the end (delta: 137.4 MB). Free memory was 141.3 MB in the beginning and 228.5 MB in the end (delta: -87.2 MB). Peak memory consumption was 50.2 MB. Max. memory is 7.1 GB. [2019-12-18 23:35:42,868 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45 ms. Allocated memory is still 146.8 MB. Free memory is still 121.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 658.17 ms. Allocated memory was 146.8 MB in the beginning and 205.5 MB in the end (delta: 58.7 MB). Free memory was 101.9 MB in the beginning and 165.0 MB in the end (delta: -63.1 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.01 ms. Allocated memory is still 205.5 MB. Free memory was 165.0 MB in the beginning and 162.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.49 ms. Allocated memory is still 205.5 MB. Free memory was 162.2 MB in the beginning and 161.3 MB in the end (delta: 933.9 kB). Peak memory consumption was 933.9 kB. Max. memory is 7.1 GB. * RCFGBuilder took 413.53 ms. Allocated memory is still 205.5 MB. Free memory was 161.3 MB in the beginning and 141.3 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 271123.96 ms. Allocated memory was 205.5 MB in the beginning and 342.9 MB in the end (delta: 137.4 MB). Free memory was 141.3 MB in the beginning and 228.5 MB in the end (delta: -87.2 MB). Peak memory consumption was 50.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (2877states) and FLOYD_HOARE automaton (currently 22 states, 22 states before enhancement),while ReachableStatesComputation was computing reachable states (391 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 49 locations, 1 error locations. Result: TIMEOUT, OverallTime: 271.0s, OverallIterations: 61, TraceHistogramMax: 7, AutomataDifference: 182.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 5325 SDtfs, 53960 SDslu, 56640 SDs, 0 SdLazy, 10178 SolverSat, 3820 SolverUnsat, 52 SolverUnknown, 0 SolverNotchecked, 67.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4379 GetRequests, 2312 SyntacticMatches, 4 SemanticMatches, 2063 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 16969 ImplicationChecksByTransitivity, 176.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2877occurred in iteration=59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.6s AutomataMinimizationTime, 60 MinimizatonAttempts, 65970 StatesRemovedByMinimization, 60 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 69.8s InterpolantComputationTime, 5396 NumberOfCodeBlocks, 5396 NumberOfCodeBlocksAsserted, 230 NumberOfCheckSat, 5276 ConstructedInterpolants, 178 QuantifiedInterpolants, 2782646 SizeOfPredicates, 245 NumberOfNonLiveVariables, 7057 ConjunctsInSsa, 791 ConjunctsInUnsatCore, 120 InterpolantComputations, 3 PerfectInterpolantSequences, 116/2428 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