/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe-McrStrategy.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 07:31:42,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 07:31:42,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 07:31:42,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 07:31:42,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 07:31:42,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 07:31:43,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 07:31:43,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 07:31:43,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 07:31:43,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 07:31:43,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 07:31:43,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 07:31:43,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 07:31:43,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 07:31:43,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 07:31:43,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 07:31:43,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 07:31:43,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 07:31:43,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 07:31:43,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 07:31:43,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 07:31:43,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 07:31:43,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 07:31:43,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 07:31:43,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 07:31:43,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 07:31:43,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 07:31:43,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 07:31:43,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 07:31:43,028 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 07:31:43,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 07:31:43,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 07:31:43,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 07:31:43,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 07:31:43,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 07:31:43,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 07:31:43,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 07:31:43,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 07:31:43,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 07:31:43,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 07:31:43,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 07:31:43,036 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe-McrStrategy.epf [2020-04-18 07:31:43,051 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 07:31:43,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 07:31:43,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 07:31:43,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 07:31:43,052 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 07:31:43,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 07:31:43,053 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 07:31:43,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 07:31:43,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 07:31:43,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 07:31:43,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 07:31:43,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 07:31:43,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 07:31:43,054 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 07:31:43,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 07:31:43,054 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 07:31:43,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 07:31:43,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 07:31:43,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 07:31:43,055 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 07:31:43,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 07:31:43,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 07:31:43,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 07:31:43,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 07:31:43,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 07:31:43,057 INFO L138 SettingsManager]: * Trace refinement strategy=MCR [2020-04-18 07:31:43,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 07:31:43,057 INFO L138 SettingsManager]: * Trace refinement strategy used in MCR=CAMEL [2020-04-18 07:31:43,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 07:31:43,057 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 07:31:43,357 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 07:31:43,371 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 07:31:43,375 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 07:31:43,376 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 07:31:43,377 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 07:31:43,378 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-04-18 07:31:43,442 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/744a93a14/c716fc61a98e40148c86c4210613f52b/FLAG5340ec78c [2020-04-18 07:31:43,990 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 07:31:43,991 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-04-18 07:31:44,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/744a93a14/c716fc61a98e40148c86c4210613f52b/FLAG5340ec78c [2020-04-18 07:31:44,276 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/744a93a14/c716fc61a98e40148c86c4210613f52b [2020-04-18 07:31:44,285 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 07:31:44,304 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 07:31:44,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 07:31:44,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 07:31:44,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 07:31:44,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 07:31:44" (1/1) ... [2020-04-18 07:31:44,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f3e1045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:44, skipping insertion in model container [2020-04-18 07:31:44,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 07:31:44" (1/1) ... [2020-04-18 07:31:44,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 07:31:44,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 07:31:44,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 07:31:44,910 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 07:31:44,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 07:31:45,039 INFO L208 MainTranslator]: Completed translation [2020-04-18 07:31:45,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45 WrapperNode [2020-04-18 07:31:45,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 07:31:45,041 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 07:31:45,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 07:31:45,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 07:31:45,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 07:31:45,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 07:31:45,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 07:31:45,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 07:31:45,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... [2020-04-18 07:31:45,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 07:31:45,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 07:31:45,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 07:31:45,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 07:31:45,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 07:31:45,207 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-18 07:31:45,208 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-18 07:31:45,208 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-18 07:31:45,208 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-18 07:31:45,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 07:31:45,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-18 07:31:45,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 07:31:45,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 07:31:45,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-18 07:31:45,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 07:31:45,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 07:31:45,212 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-18 07:31:45,587 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 07:31:45,588 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-18 07:31:45,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 07:31:45 BoogieIcfgContainer [2020-04-18 07:31:45,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 07:31:45,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 07:31:45,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 07:31:45,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 07:31:45,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 07:31:44" (1/3) ... [2020-04-18 07:31:45,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5e63e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 07:31:45, skipping insertion in model container [2020-04-18 07:31:45,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:31:45" (2/3) ... [2020-04-18 07:31:45,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5e63e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 07:31:45, skipping insertion in model container [2020-04-18 07:31:45,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 07:31:45" (3/3) ... [2020-04-18 07:31:45,600 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2020-04-18 07:31:45,609 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 07:31:45,610 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 07:31:45,616 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 07:31:45,616 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 07:31:45,641 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,642 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,642 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,642 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,643 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,643 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,643 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,644 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,647 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,648 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,648 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,648 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,649 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,649 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,649 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,650 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,650 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,653 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,654 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,654 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,654 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,655 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,655 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,655 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,656 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,656 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,656 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,657 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,657 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,657 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,661 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,661 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,662 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,662 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,662 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,663 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,669 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,669 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,670 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,670 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,670 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,670 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:31:45,687 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 07:31:45,708 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 07:31:45,709 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 07:31:45,709 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 07:31:45,709 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 07:31:45,709 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 07:31:45,710 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 07:31:45,710 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 07:31:45,710 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 07:31:45,726 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-04-18 07:31:45,728 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-18 07:31:45,769 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-18 07:31:45,770 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 07:31:45,776 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-18 07:31:45,779 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-18 07:31:45,796 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-18 07:31:45,797 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-18 07:31:45,798 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-18 07:31:45,799 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-04-18 07:31:45,800 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-18 07:31:47,018 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-04-18 07:31:47,122 INFO L206 etLargeBlockEncoding]: Checked pairs total: 879 [2020-04-18 07:31:47,123 INFO L214 etLargeBlockEncoding]: Total number of compositions: 48 [2020-04-18 07:31:47,130 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-04-18 07:31:47,142 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-18 07:31:47,144 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 07:31:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 07:31:47,153 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:47,154 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-18 07:31:47,155 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:47,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:47,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-04-18 07:31:47,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:47,166 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1470808130] [2020-04-18 07:31:47,179 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:47,190 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 07:31:47,191 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-04-18 07:31:47,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-18 07:31:47,192 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:47,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:47,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 2 times [2020-04-18 07:31:47,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:47,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324426297] [2020-04-18 07:31:47,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:47,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324426297] [2020-04-18 07:31:47,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:47,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 07:31:47,445 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:47,446 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:47,450 INFO L259 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-04-18 07:31:47,450 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:47,469 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 0 times. [2020-04-18 07:31:47,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 07:31:47,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-18 07:31:47,476 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2020-04-18 07:31:47,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:47,500 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-04-18 07:31:47,501 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-04-18 07:31:47,501 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:47,502 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1470808130] [2020-04-18 07:31:47,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:47,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2] total 2 [2020-04-18 07:31:47,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1470808130] [2020-04-18 07:31:47,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-18 07:31:47,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:47,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-18 07:31:47,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 07:31:47,510 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-18 07:31:47,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:47,556 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-04-18 07:31:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-18 07:31:47,558 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-18 07:31:47,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:47,570 INFO L225 Difference]: With dead ends: 83 [2020-04-18 07:31:47,571 INFO L226 Difference]: Without dead ends: 54 [2020-04-18 07:31:47,572 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-18 07:31:47,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-18 07:31:47,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-04-18 07:31:47,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-18 07:31:47,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-04-18 07:31:47,616 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-04-18 07:31:47,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:47,616 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-04-18 07:31:47,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-18 07:31:47,617 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-04-18 07:31:47,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:31:47,618 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:47,618 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:47,618 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:47,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:47,619 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-04-18 07:31:47,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:47,619 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1610537730] [2020-04-18 07:31:47,620 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:47,620 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 24 transitions. [2020-04-18 07:31:47,621 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-04-18 07:31:47,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:31:47,622 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:47,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:47,622 INFO L82 PathProgramCache]: Analyzing trace with hash 235305767, now seen corresponding path program 2 times [2020-04-18 07:31:47,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:47,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942000900] [2020-04-18 07:31:47,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:47,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942000900] [2020-04-18 07:31:47,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:47,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 07:31:47,776 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:47,777 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:47,779 INFO L259 McrAutomatonBuilder]: Finished intersection with 14 states and 18 transitions. [2020-04-18 07:31:47,780 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:47,820 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:31:47,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 07:31:47,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-04-18 07:31:47,821 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-04-18 07:31:47,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:47,856 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2020-04-18 07:31:47,857 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-04-18 07:31:47,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:31:47,857 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:31:47,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:47,858 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 3 times [2020-04-18 07:31:47,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:47,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036744271] [2020-04-18 07:31:47,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:48,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036744271] [2020-04-18 07:31:48,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:48,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 07:31:48,002 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:48,003 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,006 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-04-18 07:31:48,007 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:48,022 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:31:48,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-18 07:31:48,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:31:48,023 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 5 states. [2020-04-18 07:31:48,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:48,053 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2020-04-18 07:31:48,053 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-04-18 07:31:48,053 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:48,054 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1610537730] [2020-04-18 07:31:48,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:48,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 07:31:48,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1610537730] [2020-04-18 07:31:48,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 07:31:48,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:48,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:48,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-04-18 07:31:48,057 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 6 states. [2020-04-18 07:31:48,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:48,214 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-04-18 07:31:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-18 07:31:48,215 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-04-18 07:31:48,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:48,217 INFO L225 Difference]: With dead ends: 80 [2020-04-18 07:31:48,217 INFO L226 Difference]: Without dead ends: 75 [2020-04-18 07:31:48,218 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:31:48,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-18 07:31:48,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-04-18 07:31:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-18 07:31:48,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-04-18 07:31:48,228 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-04-18 07:31:48,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:48,229 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-04-18 07:31:48,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 07:31:48,229 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-04-18 07:31:48,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:31:48,230 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:48,231 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:48,231 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:48,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:48,231 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-04-18 07:31:48,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:48,232 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2101913275] [2020-04-18 07:31:48,232 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,233 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-04-18 07:31:48,233 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-04-18 07:31:48,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-18 07:31:48,234 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:48,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:48,234 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 2 times [2020-04-18 07:31:48,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:48,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605109970] [2020-04-18 07:31:48,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:48,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605109970] [2020-04-18 07:31:48,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:48,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 07:31:48,290 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:48,290 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,291 INFO L259 McrAutomatonBuilder]: Finished intersection with 11 states and 12 transitions. [2020-04-18 07:31:48,292 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:48,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:48,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:48,337 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:31:48,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:48,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-18 07:31:48,338 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 6 states. [2020-04-18 07:31:48,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:48,360 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2020-04-18 07:31:48,360 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-04-18 07:31:48,361 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:48,361 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [2101913275] [2020-04-18 07:31:48,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:48,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-04-18 07:31:48,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [2101913275] [2020-04-18 07:31:48,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 07:31:48,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:48,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:48,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:31:48,363 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 6 states. [2020-04-18 07:31:48,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:48,395 INFO L93 Difference]: Finished difference Result 83 states and 196 transitions. [2020-04-18 07:31:48,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-18 07:31:48,396 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-04-18 07:31:48,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:48,397 INFO L225 Difference]: With dead ends: 83 [2020-04-18 07:31:48,397 INFO L226 Difference]: Without dead ends: 77 [2020-04-18 07:31:48,398 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-18 07:31:48,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-18 07:31:48,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2020-04-18 07:31:48,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-18 07:31:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-04-18 07:31:48,407 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-04-18 07:31:48,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:48,407 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-04-18 07:31:48,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 07:31:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-04-18 07:31:48,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:48,408 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:48,408 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:48,409 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:48,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:48,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 4 times [2020-04-18 07:31:48,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:48,410 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1258631868] [2020-04-18 07:31:48,410 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,410 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 33 transitions. [2020-04-18 07:31:48,411 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-04-18 07:31:48,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:48,411 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:48,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:48,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1295455160, now seen corresponding path program 5 times [2020-04-18 07:31:48,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:48,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314077891] [2020-04-18 07:31:48,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-18 07:31:48,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314077891] [2020-04-18 07:31:48,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:48,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 07:31:48,468 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:48,469 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,470 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 07:31:48,470 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:48,500 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 4 times. [2020-04-18 07:31:48,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:48,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-18 07:31:48,500 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-04-18 07:31:48,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:48,559 INFO L93 Difference]: Finished difference Result 26 states and 37 transitions. [2020-04-18 07:31:48,559 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2020-04-18 07:31:48,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:48,560 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:31:48,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:48,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1294792070, now seen corresponding path program 6 times [2020-04-18 07:31:48,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:48,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963834520] [2020-04-18 07:31:48,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:48,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:48,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963834520] [2020-04-18 07:31:48,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833619686] [2020-04-18 07:31:48,616 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:48,674 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:31:48,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:48,676 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-18 07:31:48,681 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:48,755 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:48,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:48,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2020-04-18 07:31:48,782 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:48,783 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:48,784 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 19 transitions. [2020-04-18 07:31:48,784 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:48,834 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 07:31:48,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:31:48,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-04-18 07:31:48,835 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2020-04-18 07:31:48,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:48,895 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2020-04-18 07:31:48,895 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-04-18 07:31:48,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:48,895 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:31:48,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:48,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 7 times [2020-04-18 07:31:48,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:48,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704472411] [2020-04-18 07:31:48,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:48,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704472411] [2020-04-18 07:31:48,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141883647] [2020-04-18 07:31:48,958 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:49,004 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 07:31:49,005 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:49,047 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:49,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:49,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-04-18 07:31:49,070 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:49,072 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:49,073 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 07:31:49,073 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:49,112 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:31:49,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 07:31:49,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-04-18 07:31:49,115 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 10 states. [2020-04-18 07:31:49,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:49,183 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2020-04-18 07:31:49,183 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-04-18 07:31:49,183 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:49,184 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1258631868] [2020-04-18 07:31:49,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:49,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 07:31:49,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1258631868] [2020-04-18 07:31:49,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 07:31:49,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:49,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:31:49,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:31:49,186 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 12 states. [2020-04-18 07:31:49,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:49,432 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-04-18 07:31:49,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 07:31:49,433 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 9 [2020-04-18 07:31:49,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:49,434 INFO L225 Difference]: With dead ends: 101 [2020-04-18 07:31:49,434 INFO L226 Difference]: Without dead ends: 96 [2020-04-18 07:31:49,435 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-04-18 07:31:49,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-18 07:31:49,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-04-18 07:31:49,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-18 07:31:49,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-04-18 07:31:49,445 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-04-18 07:31:49,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:49,445 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-04-18 07:31:49,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 07:31:49,445 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-04-18 07:31:49,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:49,446 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:49,446 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:49,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:49,851 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:49,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:49,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-04-18 07:31:49,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:49,853 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1131941357] [2020-04-18 07:31:49,853 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:49,854 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-04-18 07:31:49,854 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-04-18 07:31:49,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-18 07:31:49,854 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:49,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:49,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 4 times [2020-04-18 07:31:49,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:49,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88191240] [2020-04-18 07:31:49,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:49,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:49,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88191240] [2020-04-18 07:31:49,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528087093] [2020-04-18 07:31:49,935 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:49,984 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:31:49,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:49,985 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-18 07:31:49,987 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:50,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:50,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-18 07:31:50,070 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:50,071 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:50,072 INFO L259 McrAutomatonBuilder]: Finished intersection with 13 states and 15 transitions. [2020-04-18 07:31:50,072 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:50,112 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:50,113 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:50,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:50,178 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:50,233 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 07:31:50,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:31:50,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-04-18 07:31:50,234 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 12 states. [2020-04-18 07:31:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:50,316 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2020-04-18 07:31:50,316 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2020-04-18 07:31:50,316 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:50,317 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1131941357] [2020-04-18 07:31:50,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:50,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 07:31:50,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1131941357] [2020-04-18 07:31:50,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 07:31:50,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:50,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:31:50,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:31:50,319 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 12 states. [2020-04-18 07:31:50,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:50,364 INFO L93 Difference]: Finished difference Result 104 states and 245 transitions. [2020-04-18 07:31:50,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-18 07:31:50,365 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 9 [2020-04-18 07:31:50,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:50,366 INFO L225 Difference]: With dead ends: 104 [2020-04-18 07:31:50,366 INFO L226 Difference]: Without dead ends: 98 [2020-04-18 07:31:50,366 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:31:50,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-18 07:31:50,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-04-18 07:31:50,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-18 07:31:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-04-18 07:31:50,375 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 9 [2020-04-18 07:31:50,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:50,375 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-04-18 07:31:50,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 07:31:50,375 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-04-18 07:31:50,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:50,376 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:50,376 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:50,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:50,580 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:50,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:50,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-04-18 07:31:50,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:50,581 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [937629554] [2020-04-18 07:31:50,582 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:50,584 INFO L259 McrAutomatonBuilder]: Finished intersection with 35 states and 66 transitions. [2020-04-18 07:31:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-04-18 07:31:50,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:50,585 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:50,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:50,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 2 times [2020-04-18 07:31:50,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:50,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575147364] [2020-04-18 07:31:50,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:50,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:50,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:50,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575147364] [2020-04-18 07:31:50,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:50,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:31:50,658 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:50,659 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:50,662 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 25 transitions. [2020-04-18 07:31:50,662 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:50,701 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:31:50,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:50,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-18 07:31:50,705 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 6 states. [2020-04-18 07:31:50,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:50,761 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2020-04-18 07:31:50,762 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 79 transitions. [2020-04-18 07:31:50,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:50,762 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:31:50,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:50,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 3 times [2020-04-18 07:31:50,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:50,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086085108] [2020-04-18 07:31:50,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:50,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086085108] [2020-04-18 07:31:50,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:50,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:31:50,875 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:50,876 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:50,879 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 07:31:50,879 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:50,898 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:50,920 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 5 times. [2020-04-18 07:31:50,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 07:31:50,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-04-18 07:31:50,922 INFO L87 Difference]: Start difference. First operand 45 states and 79 transitions. Second operand 7 states. [2020-04-18 07:31:50,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:50,993 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2020-04-18 07:31:50,993 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 83 transitions. [2020-04-18 07:31:50,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:50,993 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:31:50,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:50,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-04-18 07:31:50,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:50,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009475754] [2020-04-18 07:31:50,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:51,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009475754] [2020-04-18 07:31:51,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:31:51,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-18 07:31:51,092 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:51,093 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:51,095 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 18 transitions. [2020-04-18 07:31:51,096 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:51,129 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 1 times. [2020-04-18 07:31:51,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 07:31:51,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-04-18 07:31:51,130 INFO L87 Difference]: Start difference. First operand 50 states and 83 transitions. Second operand 6 states. [2020-04-18 07:31:51,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:51,204 INFO L93 Difference]: Finished difference Result 52 states and 83 transitions. [2020-04-18 07:31:51,204 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 83 transitions. [2020-04-18 07:31:51,204 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:51,205 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [937629554] [2020-04-18 07:31:51,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:51,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-04-18 07:31:51,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [937629554] [2020-04-18 07:31:51,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-18 07:31:51,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:51,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:51,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2020-04-18 07:31:51,207 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 11 states. [2020-04-18 07:31:51,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:51,305 INFO L93 Difference]: Finished difference Result 124 states and 288 transitions. [2020-04-18 07:31:51,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 07:31:51,305 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-18 07:31:51,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:51,307 INFO L225 Difference]: With dead ends: 124 [2020-04-18 07:31:51,307 INFO L226 Difference]: Without dead ends: 119 [2020-04-18 07:31:51,307 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:31:51,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-18 07:31:51,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 87. [2020-04-18 07:31:51,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-18 07:31:51,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 210 transitions. [2020-04-18 07:31:51,321 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 210 transitions. Word has length 10 [2020-04-18 07:31:51,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:51,321 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 210 transitions. [2020-04-18 07:31:51,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-18 07:31:51,321 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 210 transitions. [2020-04-18 07:31:51,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:51,322 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:51,322 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:51,322 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:51,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:51,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 5 times [2020-04-18 07:31:51,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:51,323 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1725421637] [2020-04-18 07:31:51,324 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:51,324 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 07:31:51,324 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-04-18 07:31:51,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-18 07:31:51,325 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:51,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:51,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-04-18 07:31:51,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:51,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041927170] [2020-04-18 07:31:51,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:51,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:51,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041927170] [2020-04-18 07:31:51,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098703715] [2020-04-18 07:31:51,445 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:51,491 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:31:51,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:51,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:51,494 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:51,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:51,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:51,612 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:51,613 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:51,615 INFO L259 McrAutomatonBuilder]: Finished intersection with 15 states and 18 transitions. [2020-04-18 07:31:51,615 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:51,666 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,691 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:51,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:51,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:51,842 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 07:31:51,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:31:51,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-04-18 07:31:51,843 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 16 states. [2020-04-18 07:31:51,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:51,954 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2020-04-18 07:31:51,954 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2020-04-18 07:31:51,954 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:51,955 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1725421637] [2020-04-18 07:31:51,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:51,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 07:31:51,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1725421637] [2020-04-18 07:31:51,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 07:31:51,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:51,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:31:51,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-04-18 07:31:51,956 INFO L87 Difference]: Start difference. First operand 87 states and 210 transitions. Second operand 16 states. [2020-04-18 07:31:52,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:52,047 INFO L93 Difference]: Finished difference Result 122 states and 292 transitions. [2020-04-18 07:31:52,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-18 07:31:52,048 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 10 [2020-04-18 07:31:52,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:52,049 INFO L225 Difference]: With dead ends: 122 [2020-04-18 07:31:52,049 INFO L226 Difference]: Without dead ends: 116 [2020-04-18 07:31:52,050 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-04-18 07:31:52,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-18 07:31:52,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 95. [2020-04-18 07:31:52,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-04-18 07:31:52,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 233 transitions. [2020-04-18 07:31:52,057 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 233 transitions. Word has length 10 [2020-04-18 07:31:52,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:52,058 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 233 transitions. [2020-04-18 07:31:52,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 07:31:52,058 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 233 transitions. [2020-04-18 07:31:52,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:52,058 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:52,059 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:52,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:52,269 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:52,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:52,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-04-18 07:31:52,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:52,269 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [877707339] [2020-04-18 07:31:52,270 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:52,271 INFO L259 McrAutomatonBuilder]: Finished intersection with 46 states and 91 transitions. [2020-04-18 07:31:52,272 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-04-18 07:31:52,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:52,273 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:52,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:52,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 6 times [2020-04-18 07:31:52,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:52,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262118963] [2020-04-18 07:31:52,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:52,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262118963] [2020-04-18 07:31:52,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648698861] [2020-04-18 07:31:52,403 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:52,465 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:31:52,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:52,466 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:52,476 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:52,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:52,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:52,573 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:52,574 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:52,576 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 28 transitions. [2020-04-18 07:31:52,576 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:52,667 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:31:52,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:52,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-18 07:31:52,668 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 11 states. [2020-04-18 07:31:52,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:52,785 INFO L93 Difference]: Finished difference Result 62 states and 117 transitions. [2020-04-18 07:31:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 117 transitions. [2020-04-18 07:31:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:52,786 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:31:52,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:52,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 7 times [2020-04-18 07:31:52,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:52,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266497130] [2020-04-18 07:31:52,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:52,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266497130] [2020-04-18 07:31:52,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309092699] [2020-04-18 07:31:52,882 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:52,926 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:52,927 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:53,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:53,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:53,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:53,008 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:53,009 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:53,011 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-04-18 07:31:53,011 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:53,071 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:31:53,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:53,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:31:53,072 INFO L87 Difference]: Start difference. First operand 62 states and 117 transitions. Second operand 11 states. [2020-04-18 07:31:53,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:53,225 INFO L93 Difference]: Finished difference Result 70 states and 127 transitions. [2020-04-18 07:31:53,225 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 127 transitions. [2020-04-18 07:31:53,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:53,226 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:31:53,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:53,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 8 times [2020-04-18 07:31:53,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:53,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955673092] [2020-04-18 07:31:53,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:53,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955673092] [2020-04-18 07:31:53,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423996237] [2020-04-18 07:31:53,299 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 [2020-04-18 07:31:53,352 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:31:53,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:53,354 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:31:53,355 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:53,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:53,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:53,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-18 07:31:53,388 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:53,390 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:53,394 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 07:31:53,394 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:53,428 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:53,429 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:53,477 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:31:53,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-18 07:31:53,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-04-18 07:31:53,478 INFO L87 Difference]: Start difference. First operand 70 states and 127 transitions. Second operand 9 states. [2020-04-18 07:31:53,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:53,625 INFO L93 Difference]: Finished difference Result 81 states and 141 transitions. [2020-04-18 07:31:53,626 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 141 transitions. [2020-04-18 07:31:53,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:53,626 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:31:53,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:53,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 9 times [2020-04-18 07:31:53,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:53,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111917448] [2020-04-18 07:31:53,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:53,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111917448] [2020-04-18 07:31:53,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099965820] [2020-04-18 07:31:53,712 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:53,772 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:31:53,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:53,773 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:53,774 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:53,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:53,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:53,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:53,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:53,857 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:53,858 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:53,859 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 23 transitions. [2020-04-18 07:31:53,860 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:53,958 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:31:53,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:53,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-04-18 07:31:53,958 INFO L87 Difference]: Start difference. First operand 81 states and 141 transitions. Second operand 11 states. [2020-04-18 07:31:54,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:54,259 INFO L93 Difference]: Finished difference Result 90 states and 146 transitions. [2020-04-18 07:31:54,259 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 146 transitions. [2020-04-18 07:31:54,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:54,259 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:31:54,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:54,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 10 times [2020-04-18 07:31:54,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:54,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833977235] [2020-04-18 07:31:54,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:54,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833977235] [2020-04-18 07:31:54,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665623086] [2020-04-18 07:31:54,315 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:54,374 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:31:54,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:54,375 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:54,376 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:54,436 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:54,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:54,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:54,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:54,451 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:54,452 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:54,477 INFO L259 McrAutomatonBuilder]: Finished intersection with 16 states and 19 transitions. [2020-04-18 07:31:54,478 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:54,601 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:31:54,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:54,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=904, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:31:54,603 INFO L87 Difference]: Start difference. First operand 90 states and 146 transitions. Second operand 11 states. [2020-04-18 07:31:54,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:54,838 INFO L93 Difference]: Finished difference Result 97 states and 149 transitions. [2020-04-18 07:31:54,838 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 149 transitions. [2020-04-18 07:31:54,838 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:54,839 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [877707339] [2020-04-18 07:31:54,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:54,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 07:31:54,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [877707339] [2020-04-18 07:31:54,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-04-18 07:31:54,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:54,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-04-18 07:31:54,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1184, Unknown=0, NotChecked=0, Total=1640 [2020-04-18 07:31:54,840 INFO L87 Difference]: Start difference. First operand 95 states and 233 transitions. Second operand 28 states. [2020-04-18 07:31:55,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:55,199 INFO L93 Difference]: Finished difference Result 217 states and 499 transitions. [2020-04-18 07:31:55,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-18 07:31:55,202 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 11 [2020-04-18 07:31:55,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:55,204 INFO L225 Difference]: With dead ends: 217 [2020-04-18 07:31:55,204 INFO L226 Difference]: Without dead ends: 198 [2020-04-18 07:31:55,205 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 116 SyntacticMatches, 10 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=1573, Unknown=0, NotChecked=0, Total=2162 [2020-04-18 07:31:55,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-04-18 07:31:55,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 107. [2020-04-18 07:31:55,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-04-18 07:31:55,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 271 transitions. [2020-04-18 07:31:55,213 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 271 transitions. Word has length 11 [2020-04-18 07:31:55,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:55,213 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 271 transitions. [2020-04-18 07:31:55,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-04-18 07:31:55,213 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 271 transitions. [2020-04-18 07:31:55,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:55,214 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:55,214 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:56,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:56,220 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:56,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:56,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 11 times [2020-04-18 07:31:56,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:56,221 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [870432680] [2020-04-18 07:31:56,222 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:56,223 INFO L259 McrAutomatonBuilder]: Finished intersection with 44 states and 87 transitions. [2020-04-18 07:31:56,223 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-18 07:31:56,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:56,224 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:56,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:56,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 12 times [2020-04-18 07:31:56,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:56,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987440381] [2020-04-18 07:31:56,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:56,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987440381] [2020-04-18 07:31:56,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799384818] [2020-04-18 07:31:56,305 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:56,347 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:31:56,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:56,348 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:56,349 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:56,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:56,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:56,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:56,421 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:56,422 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:56,423 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-04-18 07:31:56,424 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:56,511 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:31:56,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:31:56,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-18 07:31:56,512 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 11 states. [2020-04-18 07:31:56,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:56,650 INFO L93 Difference]: Finished difference Result 61 states and 115 transitions. [2020-04-18 07:31:56,650 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 115 transitions. [2020-04-18 07:31:56,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:56,651 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:31:56,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:56,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 13 times [2020-04-18 07:31:56,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:56,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722456736] [2020-04-18 07:31:56,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:56,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722456736] [2020-04-18 07:31:56,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062888046] [2020-04-18 07:31:56,753 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:56,800 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:56,802 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:56,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:56,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:56,869 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:56,869 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:56,872 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 31 transitions. [2020-04-18 07:31:56,872 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:56,887 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:56,959 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:56,959 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:56,990 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:31:56,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:31:56,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-18 07:31:56,991 INFO L87 Difference]: Start difference. First operand 61 states and 115 transitions. Second operand 13 states. [2020-04-18 07:31:57,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:57,216 INFO L93 Difference]: Finished difference Result 71 states and 126 transitions. [2020-04-18 07:31:57,216 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 126 transitions. [2020-04-18 07:31:57,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:57,217 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:31:57,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:57,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 14 times [2020-04-18 07:31:57,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:57,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406443733] [2020-04-18 07:31:57,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:57,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:57,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406443733] [2020-04-18 07:31:57,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966001025] [2020-04-18 07:31:57,315 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:57,359 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:31:57,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:57,360 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:57,363 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:57,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:57,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:57,434 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:57,434 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:57,436 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 29 transitions. [2020-04-18 07:31:57,436 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:57,464 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:57,487 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:57,488 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:57,526 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:57,555 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 11 times. [2020-04-18 07:31:57,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 07:31:57,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2020-04-18 07:31:57,556 INFO L87 Difference]: Start difference. First operand 71 states and 126 transitions. Second operand 14 states. [2020-04-18 07:31:57,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:57,794 INFO L93 Difference]: Finished difference Result 79 states and 134 transitions. [2020-04-18 07:31:57,794 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 134 transitions. [2020-04-18 07:31:57,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:57,795 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:31:57,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:57,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 15 times [2020-04-18 07:31:57,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:57,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217584842] [2020-04-18 07:31:57,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:57,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217584842] [2020-04-18 07:31:57,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816309171] [2020-04-18 07:31:57,858 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:57,910 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:31:57,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:57,911 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:31:57,912 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:57,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:57,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-18 07:31:57,977 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:57,978 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:57,979 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-04-18 07:31:57,979 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:58,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:58,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:58,028 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:31:58,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:31:58,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-04-18 07:31:58,029 INFO L87 Difference]: Start difference. First operand 79 states and 134 transitions. Second operand 12 states. [2020-04-18 07:31:58,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:58,313 INFO L93 Difference]: Finished difference Result 80 states and 134 transitions. [2020-04-18 07:31:58,313 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 134 transitions. [2020-04-18 07:31:58,314 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:58,314 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [870432680] [2020-04-18 07:31:58,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:58,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-04-18 07:31:58,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [870432680] [2020-04-18 07:31:58,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-18 07:31:58,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:58,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-18 07:31:58,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=646, Unknown=0, NotChecked=0, Total=930 [2020-04-18 07:31:58,317 INFO L87 Difference]: Start difference. First operand 107 states and 271 transitions. Second operand 23 states. [2020-04-18 07:31:58,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:58,476 INFO L93 Difference]: Finished difference Result 153 states and 367 transitions. [2020-04-18 07:31:58,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-18 07:31:58,476 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 11 [2020-04-18 07:31:58,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:31:58,478 INFO L225 Difference]: With dead ends: 153 [2020-04-18 07:31:58,479 INFO L226 Difference]: Without dead ends: 148 [2020-04-18 07:31:58,479 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=284, Invalid=646, Unknown=0, NotChecked=0, Total=930 [2020-04-18 07:31:58,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-04-18 07:31:58,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 110. [2020-04-18 07:31:58,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-18 07:31:58,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 273 transitions. [2020-04-18 07:31:58,485 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 273 transitions. Word has length 11 [2020-04-18 07:31:58,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:31:58,486 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 273 transitions. [2020-04-18 07:31:58,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-18 07:31:58,486 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 273 transitions. [2020-04-18 07:31:58,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:58,487 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:31:58,487 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:31:59,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:59,296 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:31:59,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:59,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 7 times [2020-04-18 07:31:59,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:31:59,296 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1024095553] [2020-04-18 07:31:59,297 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:59,297 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 31 transitions. [2020-04-18 07:31:59,297 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-04-18 07:31:59,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-18 07:31:59,298 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:31:59,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:31:59,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 8 times [2020-04-18 07:31:59,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:31:59,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223472540] [2020-04-18 07:31:59,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:31:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:31:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:59,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223472540] [2020-04-18 07:31:59,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095998292] [2020-04-18 07:31:59,391 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:31:59,442 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:31:59,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:31:59,443 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:31:59,444 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:31:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:31:59,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:31:59,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:31:59,539 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:31:59,539 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:31:59,541 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-04-18 07:31:59,541 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:31:59,589 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:59,589 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,642 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:59,643 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,660 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,741 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:59,742 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,759 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,789 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:31:59,789 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:31:59,810 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 9 times. [2020-04-18 07:31:59,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 07:31:59,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-04-18 07:31:59,811 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 20 states. [2020-04-18 07:31:59,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:31:59,983 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2020-04-18 07:31:59,983 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2020-04-18 07:31:59,983 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:31:59,983 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1024095553] [2020-04-18 07:31:59,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:31:59,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 07:31:59,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1024095553] [2020-04-18 07:31:59,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 07:31:59,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:31:59,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 07:31:59,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-18 07:31:59,985 INFO L87 Difference]: Start difference. First operand 110 states and 273 transitions. Second operand 20 states. [2020-04-18 07:32:00,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:00,094 INFO L93 Difference]: Finished difference Result 158 states and 382 transitions. [2020-04-18 07:32:00,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-18 07:32:00,095 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 11 [2020-04-18 07:32:00,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:32:00,096 INFO L225 Difference]: With dead ends: 158 [2020-04-18 07:32:00,097 INFO L226 Difference]: Without dead ends: 152 [2020-04-18 07:32:00,097 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-18 07:32:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-04-18 07:32:00,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 119. [2020-04-18 07:32:00,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-18 07:32:00,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 299 transitions. [2020-04-18 07:32:00,104 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 299 transitions. Word has length 11 [2020-04-18 07:32:00,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:32:00,104 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 299 transitions. [2020-04-18 07:32:00,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 07:32:00,104 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 299 transitions. [2020-04-18 07:32:00,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:00,105 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:32:00,105 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:32:00,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:00,309 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:32:00,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:00,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 16 times [2020-04-18 07:32:00,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:32:00,310 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [270191798] [2020-04-18 07:32:00,311 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:00,312 INFO L259 McrAutomatonBuilder]: Finished intersection with 57 states and 116 transitions. [2020-04-18 07:32:00,312 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-04-18 07:32:00,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:00,313 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:32:00,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:00,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 17 times [2020-04-18 07:32:00,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:00,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239070331] [2020-04-18 07:32:00,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:00,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239070331] [2020-04-18 07:32:00,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864489869] [2020-04-18 07:32:00,387 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:00,435 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:00,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:00,436 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:00,437 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:00,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:00,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:00,531 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:00,532 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:00,534 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 31 transitions. [2020-04-18 07:32:00,535 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:00,650 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:00,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:00,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:32:00,651 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 13 states. [2020-04-18 07:32:00,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:00,849 INFO L93 Difference]: Finished difference Result 79 states and 155 transitions. [2020-04-18 07:32:00,849 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 155 transitions. [2020-04-18 07:32:00,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:00,850 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:32:00,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:00,850 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 18 times [2020-04-18 07:32:00,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:00,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623718969] [2020-04-18 07:32:00,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:00,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623718969] [2020-04-18 07:32:00,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930587230] [2020-04-18 07:32:00,947 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:00,995 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:32:00,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:00,996 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:00,998 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:01,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:01,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:01,089 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:01,090 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:01,092 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 07:32:01,092 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:01,133 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:32:01,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:01,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:32:01,134 INFO L87 Difference]: Start difference. First operand 79 states and 155 transitions. Second operand 13 states. [2020-04-18 07:32:01,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:01,326 INFO L93 Difference]: Finished difference Result 93 states and 178 transitions. [2020-04-18 07:32:01,327 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 178 transitions. [2020-04-18 07:32:01,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:01,327 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:32:01,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:01,328 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 19 times [2020-04-18 07:32:01,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:01,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672845875] [2020-04-18 07:32:01,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:01,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672845875] [2020-04-18 07:32:01,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637049097] [2020-04-18 07:32:01,402 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:01,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:01,454 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:01,455 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:01,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:01,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:01,553 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:01,554 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:01,555 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 34 transitions. [2020-04-18 07:32:01,555 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:01,628 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 07:32:01,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:01,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-18 07:32:01,629 INFO L87 Difference]: Start difference. First operand 93 states and 178 transitions. Second operand 13 states. [2020-04-18 07:32:01,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:01,825 INFO L93 Difference]: Finished difference Result 101 states and 188 transitions. [2020-04-18 07:32:01,825 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 188 transitions. [2020-04-18 07:32:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:01,826 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:32:01,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:01,826 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 20 times [2020-04-18 07:32:01,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:01,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039533125] [2020-04-18 07:32:01,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:01,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039533125] [2020-04-18 07:32:01,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115207081] [2020-04-18 07:32:01,904 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:01,953 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:01,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:01,954 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:32:01,955 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:01,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:01,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-18 07:32:01,986 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:01,987 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:01,989 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 40 transitions. [2020-04-18 07:32:01,989 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:02,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:02,067 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 11 times. [2020-04-18 07:32:02,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-18 07:32:02,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2020-04-18 07:32:02,068 INFO L87 Difference]: Start difference. First operand 101 states and 188 transitions. Second operand 10 states. [2020-04-18 07:32:02,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:02,260 INFO L93 Difference]: Finished difference Result 119 states and 214 transitions. [2020-04-18 07:32:02,260 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 214 transitions. [2020-04-18 07:32:02,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:02,261 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:32:02,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:02,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 21 times [2020-04-18 07:32:02,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:02,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143129741] [2020-04-18 07:32:02,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:02,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143129741] [2020-04-18 07:32:02,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306228745] [2020-04-18 07:32:02,332 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:02,394 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:32:02,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:02,395 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:02,396 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:02,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:02,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:02,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:02,507 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:02,507 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:02,509 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 07:32:02,509 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:02,641 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:32:02,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:02,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2020-04-18 07:32:02,642 INFO L87 Difference]: Start difference. First operand 119 states and 214 transitions. Second operand 13 states. [2020-04-18 07:32:03,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:03,254 INFO L93 Difference]: Finished difference Result 136 states and 231 transitions. [2020-04-18 07:32:03,254 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 231 transitions. [2020-04-18 07:32:03,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:03,255 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:32:03,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:03,256 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 22 times [2020-04-18 07:32:03,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:03,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67550682] [2020-04-18 07:32:03,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:03,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:03,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67550682] [2020-04-18 07:32:03,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016486141] [2020-04-18 07:32:03,317 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:03,379 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:03,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:03,381 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:03,382 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:03,463 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:03,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:03,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:03,472 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:03,473 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:03,475 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2020-04-18 07:32:03,475 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:03,661 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:32:03,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:03,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1222, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 07:32:03,663 INFO L87 Difference]: Start difference. First operand 136 states and 231 transitions. Second operand 13 states. [2020-04-18 07:32:04,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:04,160 INFO L93 Difference]: Finished difference Result 152 states and 241 transitions. [2020-04-18 07:32:04,160 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 241 transitions. [2020-04-18 07:32:04,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:04,161 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:32:04,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:04,161 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 23 times [2020-04-18 07:32:04,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:04,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674932948] [2020-04-18 07:32:04,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:04,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674932948] [2020-04-18 07:32:04,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662193580] [2020-04-18 07:32:04,239 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:04,297 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:04,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:04,298 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:04,306 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:04,378 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:04,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:04,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:04,386 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:04,387 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:04,390 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 07:32:04,390 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:04,642 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:32:04,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:04,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=906, Invalid=2634, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 07:32:04,644 INFO L87 Difference]: Start difference. First operand 152 states and 241 transitions. Second operand 13 states. [2020-04-18 07:32:05,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:05,068 INFO L93 Difference]: Finished difference Result 164 states and 248 transitions. [2020-04-18 07:32:05,068 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 248 transitions. [2020-04-18 07:32:05,069 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:32:05,069 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [270191798] [2020-04-18 07:32:05,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:05,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 07:32:05,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [270191798] [2020-04-18 07:32:05,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-04-18 07:32:05,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:32:05,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-04-18 07:32:05,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=3294, Unknown=0, NotChecked=0, Total=4422 [2020-04-18 07:32:05,072 INFO L87 Difference]: Start difference. First operand 119 states and 299 transitions. Second operand 41 states. [2020-04-18 07:32:05,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:05,879 INFO L93 Difference]: Finished difference Result 287 states and 662 transitions. [2020-04-18 07:32:05,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-04-18 07:32:05,880 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 12 [2020-04-18 07:32:05,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:32:05,881 INFO L225 Difference]: With dead ends: 287 [2020-04-18 07:32:05,882 INFO L226 Difference]: Without dead ends: 268 [2020-04-18 07:32:05,883 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 192 SyntacticMatches, 25 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1498, Invalid=4508, Unknown=0, NotChecked=0, Total=6006 [2020-04-18 07:32:05,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-04-18 07:32:05,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 131. [2020-04-18 07:32:05,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-04-18 07:32:05,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 337 transitions. [2020-04-18 07:32:05,890 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 337 transitions. Word has length 12 [2020-04-18 07:32:05,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:32:05,890 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 337 transitions. [2020-04-18 07:32:05,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-04-18 07:32:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 337 transitions. [2020-04-18 07:32:05,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:05,891 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:32:05,891 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:32:07,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:07,297 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:32:07,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:07,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 24 times [2020-04-18 07:32:07,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:32:07,298 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [2131845230] [2020-04-18 07:32:07,299 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:07,299 INFO L259 McrAutomatonBuilder]: Finished intersection with 58 states and 120 transitions. [2020-04-18 07:32:07,300 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-04-18 07:32:07,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:07,300 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:32:07,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:07,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 25 times [2020-04-18 07:32:07,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:07,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100747296] [2020-04-18 07:32:07,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:07,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:07,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100747296] [2020-04-18 07:32:07,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822441906] [2020-04-18 07:32:07,375 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:07,448 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:07,449 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:07,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:07,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:07,573 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:07,573 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:07,576 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 29 transitions. [2020-04-18 07:32:07,577 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:07,733 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:32:07,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:07,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-18 07:32:07,734 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 13 states. [2020-04-18 07:32:07,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:07,979 INFO L93 Difference]: Finished difference Result 84 states and 169 transitions. [2020-04-18 07:32:07,979 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 169 transitions. [2020-04-18 07:32:07,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:07,979 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:32:07,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:07,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 26 times [2020-04-18 07:32:07,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:07,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748150250] [2020-04-18 07:32:07,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:07,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:08,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748150250] [2020-04-18 07:32:08,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819045898] [2020-04-18 07:32:08,096 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:08,143 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:08,144 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:08,144 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:08,145 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:08,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:08,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:08,237 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:08,237 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:08,239 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-04-18 07:32:08,240 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:08,323 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:32:08,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:08,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2020-04-18 07:32:08,324 INFO L87 Difference]: Start difference. First operand 84 states and 169 transitions. Second operand 13 states. [2020-04-18 07:32:08,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:08,582 INFO L93 Difference]: Finished difference Result 92 states and 178 transitions. [2020-04-18 07:32:08,582 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 178 transitions. [2020-04-18 07:32:08,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:08,583 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:32:08,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:08,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 27 times [2020-04-18 07:32:08,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:08,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165899325] [2020-04-18 07:32:08,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:08,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165899325] [2020-04-18 07:32:08,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540228100] [2020-04-18 07:32:08,689 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:08,734 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:32:08,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:08,735 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:08,736 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:08,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:08,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:08,823 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:08,823 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:08,826 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 32 transitions. [2020-04-18 07:32:08,826 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:08,863 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:08,967 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:08,968 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:08,991 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:08,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:08,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=623, Unknown=0, NotChecked=0, Total=870 [2020-04-18 07:32:08,992 INFO L87 Difference]: Start difference. First operand 92 states and 178 transitions. Second operand 15 states. [2020-04-18 07:32:09,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:09,366 INFO L93 Difference]: Finished difference Result 110 states and 201 transitions. [2020-04-18 07:32:09,366 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 201 transitions. [2020-04-18 07:32:09,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:09,367 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:32:09,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:09,367 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 28 times [2020-04-18 07:32:09,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:09,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241570686] [2020-04-18 07:32:09,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:09,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241570686] [2020-04-18 07:32:09,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445428655] [2020-04-18 07:32:09,476 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:09,517 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:09,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:09,518 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:09,519 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:09,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:09,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:09,596 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:09,597 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:09,598 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 07:32:09,598 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:09,642 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:09,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:09,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=913, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:32:09,642 INFO L87 Difference]: Start difference. First operand 110 states and 201 transitions. Second operand 13 states. [2020-04-18 07:32:09,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:09,850 INFO L93 Difference]: Finished difference Result 123 states and 221 transitions. [2020-04-18 07:32:09,850 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 221 transitions. [2020-04-18 07:32:09,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:09,850 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:32:09,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:09,851 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 29 times [2020-04-18 07:32:09,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:09,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982703609] [2020-04-18 07:32:09,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:09,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982703609] [2020-04-18 07:32:09,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688443171] [2020-04-18 07:32:09,933 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:09,978 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:09,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:09,979 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:09,980 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:10,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:10,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:10,064 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:10,064 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:10,066 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 07:32:10,066 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:10,070 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:10,108 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:10,141 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:10,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:10,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1022, Unknown=0, NotChecked=0, Total=1406 [2020-04-18 07:32:10,142 INFO L87 Difference]: Start difference. First operand 123 states and 221 transitions. Second operand 15 states. [2020-04-18 07:32:10,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:10,581 INFO L93 Difference]: Finished difference Result 137 states and 239 transitions. [2020-04-18 07:32:10,581 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 239 transitions. [2020-04-18 07:32:10,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:10,582 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:32:10,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:10,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 30 times [2020-04-18 07:32:10,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:10,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814896671] [2020-04-18 07:32:10,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:10,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814896671] [2020-04-18 07:32:10,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347091664] [2020-04-18 07:32:10,654 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:10,698 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:32:10,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:10,699 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:10,699 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:10,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:10,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:10,789 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:10,790 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:10,791 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 36 transitions. [2020-04-18 07:32:10,791 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:10,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:10,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:10,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:10,909 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:10,947 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 17 times. [2020-04-18 07:32:10,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:32:10,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=1532, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 07:32:10,949 INFO L87 Difference]: Start difference. First operand 137 states and 239 transitions. Second operand 16 states. [2020-04-18 07:32:11,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:11,457 INFO L93 Difference]: Finished difference Result 156 states and 263 transitions. [2020-04-18 07:32:11,457 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 263 transitions. [2020-04-18 07:32:11,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:11,458 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:32:11,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:11,458 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 31 times [2020-04-18 07:32:11,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:11,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845462013] [2020-04-18 07:32:11,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:11,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845462013] [2020-04-18 07:32:11,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659667526] [2020-04-18 07:32:11,645 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:11,726 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:11,727 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:11,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:11,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:11,869 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:11,871 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:11,873 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-04-18 07:32:11,874 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:11,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:12,063 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 07:32:12,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 07:32:12,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=1956, Unknown=0, NotChecked=0, Total=2652 [2020-04-18 07:32:12,065 INFO L87 Difference]: Start difference. First operand 156 states and 263 transitions. Second operand 14 states. [2020-04-18 07:32:12,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:12,653 INFO L93 Difference]: Finished difference Result 161 states and 267 transitions. [2020-04-18 07:32:12,653 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 267 transitions. [2020-04-18 07:32:12,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:12,654 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 07:32:12,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:12,654 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 32 times [2020-04-18 07:32:12,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:12,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938919762] [2020-04-18 07:32:12,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:12,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938919762] [2020-04-18 07:32:12,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183276931] [2020-04-18 07:32:12,711 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:12,748 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:12,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:12,748 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:12,749 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:12,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:12,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:12,826 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:12,827 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:12,828 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 07:32:12,828 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:12,896 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:32:12,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:12,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=919, Invalid=2621, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 07:32:12,898 INFO L87 Difference]: Start difference. First operand 161 states and 267 transitions. Second operand 13 states. [2020-04-18 07:32:13,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:13,299 INFO L93 Difference]: Finished difference Result 173 states and 276 transitions. [2020-04-18 07:32:13,299 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 276 transitions. [2020-04-18 07:32:13,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:13,300 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 07:32:13,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:13,301 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 33 times [2020-04-18 07:32:13,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:13,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202786028] [2020-04-18 07:32:13,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:13,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202786028] [2020-04-18 07:32:13,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822617516] [2020-04-18 07:32:13,370 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:13,411 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:32:13,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:13,412 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 07:32:13,413 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:13,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:13,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:13,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-04-18 07:32:13,486 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:13,487 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:13,488 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 22 transitions. [2020-04-18 07:32:13,488 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:13,560 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:13,649 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:32:13,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:13,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1143, Invalid=3549, Unknown=0, NotChecked=0, Total=4692 [2020-04-18 07:32:13,652 INFO L87 Difference]: Start difference. First operand 173 states and 276 transitions. Second operand 13 states. [2020-04-18 07:32:14,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:14,241 INFO L93 Difference]: Finished difference Result 184 states and 285 transitions. [2020-04-18 07:32:14,241 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 285 transitions. [2020-04-18 07:32:14,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:14,242 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 07:32:14,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:14,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 34 times [2020-04-18 07:32:14,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:14,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014357393] [2020-04-18 07:32:14,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:14,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014357393] [2020-04-18 07:32:14,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48525961] [2020-04-18 07:32:14,322 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:14,362 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:14,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:14,363 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 07:32:14,363 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:14,431 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:14,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:14,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-18 07:32:14,439 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:14,440 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:14,441 INFO L259 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-04-18 07:32:14,442 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:14,618 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:32:14,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-18 07:32:14,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1639, Invalid=4841, Unknown=0, NotChecked=0, Total=6480 [2020-04-18 07:32:14,621 INFO L87 Difference]: Start difference. First operand 184 states and 285 transitions. Second operand 13 states. [2020-04-18 07:32:15,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:15,217 INFO L93 Difference]: Finished difference Result 193 states and 289 transitions. [2020-04-18 07:32:15,218 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 289 transitions. [2020-04-18 07:32:15,218 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:32:15,219 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [2131845230] [2020-04-18 07:32:15,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:15,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-04-18 07:32:15,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [2131845230] [2020-04-18 07:32:15,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-04-18 07:32:15,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:32:15,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-04-18 07:32:15,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1970, Invalid=6040, Unknown=0, NotChecked=0, Total=8010 [2020-04-18 07:32:15,224 INFO L87 Difference]: Start difference. First operand 131 states and 337 transitions. Second operand 52 states. [2020-04-18 07:32:16,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:16,335 INFO L93 Difference]: Finished difference Result 283 states and 666 transitions. [2020-04-18 07:32:16,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-18 07:32:16,335 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 12 [2020-04-18 07:32:16,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:32:16,339 INFO L225 Difference]: With dead ends: 283 [2020-04-18 07:32:16,339 INFO L226 Difference]: Without dead ends: 263 [2020-04-18 07:32:16,341 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 258 SyntacticMatches, 24 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5388 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2791, Invalid=8551, Unknown=0, NotChecked=0, Total=11342 [2020-04-18 07:32:16,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-04-18 07:32:16,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 136. [2020-04-18 07:32:16,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-18 07:32:16,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 343 transitions. [2020-04-18 07:32:16,347 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 343 transitions. Word has length 12 [2020-04-18 07:32:16,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:32:16,347 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 343 transitions. [2020-04-18 07:32:16,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-04-18 07:32:16,348 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 343 transitions. [2020-04-18 07:32:16,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:16,348 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:32:16,348 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:32:18,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:18,360 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:32:18,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:18,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 9 times [2020-04-18 07:32:18,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:32:18,361 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [581672748] [2020-04-18 07:32:18,361 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:18,361 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 36 transitions. [2020-04-18 07:32:18,362 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-04-18 07:32:18,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-18 07:32:18,362 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:32:18,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:18,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 10 times [2020-04-18 07:32:18,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:18,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064337974] [2020-04-18 07:32:18,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:18,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064337974] [2020-04-18 07:32:18,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950701577] [2020-04-18 07:32:18,476 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:18,527 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:18,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:18,528 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:18,529 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:18,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:18,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:18,645 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:18,645 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:18,647 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2020-04-18 07:32:18,647 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:18,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:18,708 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,738 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,764 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:18,765 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,784 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:18,784 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,801 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,914 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:18,914 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,938 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:18,938 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:18,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:18,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:19,006 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:19,044 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 11 times. [2020-04-18 07:32:19,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 07:32:19,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2020-04-18 07:32:19,045 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 24 states. [2020-04-18 07:32:19,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:19,278 INFO L93 Difference]: Finished difference Result 25 states and 36 transitions. [2020-04-18 07:32:19,278 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2020-04-18 07:32:19,279 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:32:19,279 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [581672748] [2020-04-18 07:32:19,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:19,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:32:19,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [581672748] [2020-04-18 07:32:19,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-18 07:32:19,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:32:19,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-18 07:32:19,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2020-04-18 07:32:19,282 INFO L87 Difference]: Start difference. First operand 136 states and 343 transitions. Second operand 24 states. [2020-04-18 07:32:19,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:19,395 INFO L93 Difference]: Finished difference Result 199 states and 487 transitions. [2020-04-18 07:32:19,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 07:32:19,396 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 12 [2020-04-18 07:32:19,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:32:19,398 INFO L225 Difference]: With dead ends: 199 [2020-04-18 07:32:19,398 INFO L226 Difference]: Without dead ends: 193 [2020-04-18 07:32:19,398 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2020-04-18 07:32:19,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-18 07:32:19,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 146. [2020-04-18 07:32:19,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-18 07:32:19,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 374 transitions. [2020-04-18 07:32:19,404 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 374 transitions. Word has length 12 [2020-04-18 07:32:19,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:32:19,404 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 374 transitions. [2020-04-18 07:32:19,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-18 07:32:19,404 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 374 transitions. [2020-04-18 07:32:19,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:19,407 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:32:19,407 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:32:19,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:19,608 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:32:19,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:19,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 35 times [2020-04-18 07:32:19,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:32:19,610 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1902349013] [2020-04-18 07:32:19,611 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:19,612 INFO L259 McrAutomatonBuilder]: Finished intersection with 72 states and 153 transitions. [2020-04-18 07:32:19,612 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2020-04-18 07:32:19,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:19,612 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:32:19,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:19,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 36 times [2020-04-18 07:32:19,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:19,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408245105] [2020-04-18 07:32:19,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:19,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408245105] [2020-04-18 07:32:19,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238155360] [2020-04-18 07:32:19,688 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:19,729 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:32:19,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:19,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:19,731 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:19,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:19,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:19,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:19,832 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:19,833 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:19,835 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 32 transitions. [2020-04-18 07:32:19,836 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:19,981 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:19,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:19,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:32:19,982 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 15 states. [2020-04-18 07:32:20,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:20,273 INFO L93 Difference]: Finished difference Result 107 states and 223 transitions. [2020-04-18 07:32:20,273 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 223 transitions. [2020-04-18 07:32:20,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:20,273 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:32:20,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:20,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 37 times [2020-04-18 07:32:20,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:20,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765474974] [2020-04-18 07:32:20,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:20,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765474974] [2020-04-18 07:32:20,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110626287] [2020-04-18 07:32:20,361 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:20,404 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:20,409 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:24,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:24,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:24,884 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:24,884 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:24,886 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 07:32:24,886 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:24,994 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:32:24,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:24,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2020-04-18 07:32:24,995 INFO L87 Difference]: Start difference. First operand 107 states and 223 transitions. Second operand 15 states. [2020-04-18 07:32:25,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:25,379 INFO L93 Difference]: Finished difference Result 119 states and 240 transitions. [2020-04-18 07:32:25,380 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 240 transitions. [2020-04-18 07:32:25,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:25,380 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:32:25,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:25,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 38 times [2020-04-18 07:32:25,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:25,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886840410] [2020-04-18 07:32:25,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:25,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886840410] [2020-04-18 07:32:25,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878347249] [2020-04-18 07:32:25,467 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:25,511 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:25,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:25,512 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:25,513 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:25,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:25,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:25,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:25,613 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:25,614 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:25,615 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 07:32:25,615 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:25,757 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:32:25,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:25,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2020-04-18 07:32:25,757 INFO L87 Difference]: Start difference. First operand 119 states and 240 transitions. Second operand 15 states. [2020-04-18 07:32:26,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:26,134 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2020-04-18 07:32:26,135 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2020-04-18 07:32:26,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:26,135 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:32:26,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:26,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 39 times [2020-04-18 07:32:26,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:26,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738660068] [2020-04-18 07:32:26,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:26,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:26,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738660068] [2020-04-18 07:32:26,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471329255] [2020-04-18 07:32:26,249 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:26,288 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:32:26,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:26,289 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:26,290 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:26,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:26,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:26,388 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:26,389 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:26,390 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 07:32:26,390 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:26,455 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:26,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:26,616 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:26,649 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:26,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:32:26,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=1320, Unknown=0, NotChecked=0, Total=1806 [2020-04-18 07:32:26,650 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand 17 states. [2020-04-18 07:32:27,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:27,205 INFO L93 Difference]: Finished difference Result 151 states and 280 transitions. [2020-04-18 07:32:27,205 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 280 transitions. [2020-04-18 07:32:27,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:27,205 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:32:27,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:27,206 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 40 times [2020-04-18 07:32:27,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:27,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137523354] [2020-04-18 07:32:27,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:27,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137523354] [2020-04-18 07:32:27,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353229671] [2020-04-18 07:32:27,327 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:27,393 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:27,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:27,394 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:27,395 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:27,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:27,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:27,568 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:27,569 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:27,571 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 07:32:27,571 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:27,643 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:32:27,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:27,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=646, Invalid=1804, Unknown=0, NotChecked=0, Total=2450 [2020-04-18 07:32:27,644 INFO L87 Difference]: Start difference. First operand 151 states and 280 transitions. Second operand 15 states. [2020-04-18 07:32:27,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:27,964 INFO L93 Difference]: Finished difference Result 173 states and 321 transitions. [2020-04-18 07:32:27,965 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 321 transitions. [2020-04-18 07:32:27,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:27,967 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:32:27,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:27,967 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 41 times [2020-04-18 07:32:27,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:27,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274516718] [2020-04-18 07:32:27,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:28,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:28,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274516718] [2020-04-18 07:32:28,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308370146] [2020-04-18 07:32:28,067 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:28,113 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:28,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:28,114 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:28,115 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:28,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:28,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:28,262 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:28,263 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:28,265 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:32:28,265 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:28,309 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:28,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:28,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=646, Invalid=1804, Unknown=0, NotChecked=0, Total=2450 [2020-04-18 07:32:28,310 INFO L87 Difference]: Start difference. First operand 173 states and 321 transitions. Second operand 15 states. [2020-04-18 07:32:28,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:28,714 INFO L93 Difference]: Finished difference Result 181 states and 330 transitions. [2020-04-18 07:32:28,714 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 330 transitions. [2020-04-18 07:32:28,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:28,715 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:32:28,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:28,716 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 42 times [2020-04-18 07:32:28,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:28,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341320206] [2020-04-18 07:32:28,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:28,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341320206] [2020-04-18 07:32:28,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992276403] [2020-04-18 07:32:28,813 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:28,858 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:32:28,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:28,859 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:28,859 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:28,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:28,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:28,976 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:28,977 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:28,979 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:32:28,979 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:28,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:29,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:29,062 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:32:29,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:32:29,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=688, Invalid=1964, Unknown=0, NotChecked=0, Total=2652 [2020-04-18 07:32:29,063 INFO L87 Difference]: Start difference. First operand 181 states and 330 transitions. Second operand 17 states. [2020-04-18 07:32:29,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:29,822 INFO L93 Difference]: Finished difference Result 204 states and 364 transitions. [2020-04-18 07:32:29,823 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 364 transitions. [2020-04-18 07:32:29,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:29,823 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 07:32:29,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:29,824 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 43 times [2020-04-18 07:32:29,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:29,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939276071] [2020-04-18 07:32:29,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:29,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939276071] [2020-04-18 07:32:29,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065868360] [2020-04-18 07:32:29,947 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:29,992 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:29,993 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:30,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:30,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:30,099 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:30,100 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:30,103 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 07:32:30,103 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:30,185 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 07:32:30,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:30,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=808, Invalid=2498, Unknown=0, NotChecked=0, Total=3306 [2020-04-18 07:32:30,186 INFO L87 Difference]: Start difference. First operand 204 states and 364 transitions. Second operand 15 states. [2020-04-18 07:32:30,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:30,535 INFO L93 Difference]: Finished difference Result 213 states and 378 transitions. [2020-04-18 07:32:30,535 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 378 transitions. [2020-04-18 07:32:30,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:30,536 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 07:32:30,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:30,537 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 44 times [2020-04-18 07:32:30,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:30,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991121886] [2020-04-18 07:32:30,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:30,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991121886] [2020-04-18 07:32:30,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744227272] [2020-04-18 07:32:30,620 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:30,675 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:30,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:30,675 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:30,676 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:34,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:34,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:34,818 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:34,819 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:34,821 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 07:32:34,821 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:34,835 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:34,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:34,904 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:34,905 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:34,938 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 07:32:34,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:32:34,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=2673, Unknown=0, NotChecked=0, Total=3540 [2020-04-18 07:32:34,939 INFO L87 Difference]: Start difference. First operand 213 states and 378 transitions. Second operand 17 states. [2020-04-18 07:32:35,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:35,671 INFO L93 Difference]: Finished difference Result 231 states and 400 transitions. [2020-04-18 07:32:35,671 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 400 transitions. [2020-04-18 07:32:35,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:35,672 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 07:32:35,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:35,672 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 45 times [2020-04-18 07:32:35,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:35,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494805325] [2020-04-18 07:32:35,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:35,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494805325] [2020-04-18 07:32:35,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030057361] [2020-04-18 07:32:35,760 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:35,806 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:32:35,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:35,807 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:35,808 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:35,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:35,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:35,964 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:35,965 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:35,968 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 43 transitions. [2020-04-18 07:32:35,968 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:36,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:36,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:36,045 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:36,045 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:36,117 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:32:36,117 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:36,156 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 23 times. [2020-04-18 07:32:36,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 07:32:36,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1097, Invalid=3459, Unknown=0, NotChecked=0, Total=4556 [2020-04-18 07:32:36,157 INFO L87 Difference]: Start difference. First operand 231 states and 400 transitions. Second operand 18 states. [2020-04-18 07:32:36,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:36,702 INFO L93 Difference]: Finished difference Result 265 states and 451 transitions. [2020-04-18 07:32:36,702 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 451 transitions. [2020-04-18 07:32:36,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:36,703 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 07:32:36,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:36,703 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 46 times [2020-04-18 07:32:36,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:36,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311193212] [2020-04-18 07:32:36,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:36,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:36,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311193212] [2020-04-18 07:32:36,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974524188] [2020-04-18 07:32:36,798 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:36,843 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:36,843 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:36,844 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:36,844 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:39,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:39,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:39,026 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:39,026 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:39,028 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 33 transitions. [2020-04-18 07:32:39,028 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:39,097 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:39,314 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 13 times. [2020-04-18 07:32:39,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:32:39,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1325, Invalid=4077, Unknown=0, NotChecked=0, Total=5402 [2020-04-18 07:32:39,315 INFO L87 Difference]: Start difference. First operand 265 states and 451 transitions. Second operand 16 states. [2020-04-18 07:32:40,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:40,248 INFO L93 Difference]: Finished difference Result 283 states and 476 transitions. [2020-04-18 07:32:40,249 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 476 transitions. [2020-04-18 07:32:40,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:40,249 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 07:32:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:40,250 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 47 times [2020-04-18 07:32:40,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:40,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429197962] [2020-04-18 07:32:40,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:40,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429197962] [2020-04-18 07:32:40,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997821388] [2020-04-18 07:32:40,337 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:40,391 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:40,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:40,393 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:40,394 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:40,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:40,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:40,551 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:40,552 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:40,555 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 07:32:40,555 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:40,717 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:32:40,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:40,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1670, Invalid=5136, Unknown=0, NotChecked=0, Total=6806 [2020-04-18 07:32:40,719 INFO L87 Difference]: Start difference. First operand 283 states and 476 transitions. Second operand 15 states. [2020-04-18 07:32:41,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:41,565 INFO L93 Difference]: Finished difference Result 299 states and 494 transitions. [2020-04-18 07:32:41,566 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 494 transitions. [2020-04-18 07:32:41,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:41,566 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 07:32:41,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:41,566 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 48 times [2020-04-18 07:32:41,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:41,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215710681] [2020-04-18 07:32:41,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:41,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215710681] [2020-04-18 07:32:41,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853629539] [2020-04-18 07:32:41,634 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:41,676 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:32:41,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:41,677 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:41,677 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:41,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:41,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:41,774 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:41,775 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:41,776 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-04-18 07:32:41,776 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:41,920 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:41,962 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 07:32:41,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:32:41,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2167, Invalid=6575, Unknown=0, NotChecked=0, Total=8742 [2020-04-18 07:32:41,963 INFO L87 Difference]: Start difference. First operand 299 states and 494 transitions. Second operand 16 states. [2020-04-18 07:32:42,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:42,780 INFO L93 Difference]: Finished difference Result 308 states and 503 transitions. [2020-04-18 07:32:42,781 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 503 transitions. [2020-04-18 07:32:42,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:42,782 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 07:32:42,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:42,782 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 49 times [2020-04-18 07:32:42,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:42,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019628513] [2020-04-18 07:32:42,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:42,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019628513] [2020-04-18 07:32:42,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434158029] [2020-04-18 07:32:42,886 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:42,942 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:42,943 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:43,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:43,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:43,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:43,052 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:43,054 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:43,056 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 07:32:43,056 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:43,347 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:32:43,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:43,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2783, Invalid=8559, Unknown=0, NotChecked=0, Total=11342 [2020-04-18 07:32:43,349 INFO L87 Difference]: Start difference. First operand 308 states and 503 transitions. Second operand 15 states. [2020-04-18 07:32:44,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:44,499 INFO L93 Difference]: Finished difference Result 330 states and 529 transitions. [2020-04-18 07:32:44,499 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 529 transitions. [2020-04-18 07:32:44,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:44,500 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 07:32:44,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:44,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 50 times [2020-04-18 07:32:44,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:44,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158683915] [2020-04-18 07:32:44,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:44,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158683915] [2020-04-18 07:32:44,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829529526] [2020-04-18 07:32:44,585 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:44,627 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:32:44,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:44,628 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:44,629 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:44,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:44,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:44,754 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:44,755 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:44,758 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 07:32:44,758 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:44,834 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:32:44,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:44,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3506, Invalid=11256, Unknown=0, NotChecked=0, Total=14762 [2020-04-18 07:32:44,835 INFO L87 Difference]: Start difference. First operand 330 states and 529 transitions. Second operand 15 states. [2020-04-18 07:32:45,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:45,228 INFO L93 Difference]: Finished difference Result 341 states and 536 transitions. [2020-04-18 07:32:45,228 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 536 transitions. [2020-04-18 07:32:45,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:45,229 INFO L105 Mcr]: ---- MCR iteration 15 ---- [2020-04-18 07:32:45,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:45,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 51 times [2020-04-18 07:32:45,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:45,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410976519] [2020-04-18 07:32:45,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:45,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410976519] [2020-04-18 07:32:45,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950067220] [2020-04-18 07:32:45,297 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:45,341 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:32:45,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:45,342 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:45,343 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:45,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:45,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:45,446 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:45,447 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:45,448 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 07:32:45,448 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:45,587 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:32:45,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:45,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3693, Invalid=12057, Unknown=0, NotChecked=0, Total=15750 [2020-04-18 07:32:45,589 INFO L87 Difference]: Start difference. First operand 341 states and 536 transitions. Second operand 15 states. [2020-04-18 07:32:46,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:46,246 INFO L93 Difference]: Finished difference Result 353 states and 545 transitions. [2020-04-18 07:32:46,246 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 545 transitions. [2020-04-18 07:32:46,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:46,247 INFO L105 Mcr]: ---- MCR iteration 16 ---- [2020-04-18 07:32:46,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:46,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 52 times [2020-04-18 07:32:46,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:46,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254090873] [2020-04-18 07:32:46,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:46,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254090873] [2020-04-18 07:32:46,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536762799] [2020-04-18 07:32:46,321 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:46,362 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:32:46,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:46,363 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:46,364 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:46,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:46,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:46,461 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:46,461 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:46,463 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 07:32:46,463 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:46,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:46,658 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:32:46,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:32:46,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4141, Invalid=13681, Unknown=0, NotChecked=0, Total=17822 [2020-04-18 07:32:46,660 INFO L87 Difference]: Start difference. First operand 353 states and 545 transitions. Second operand 16 states. [2020-04-18 07:32:47,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:47,438 INFO L93 Difference]: Finished difference Result 365 states and 551 transitions. [2020-04-18 07:32:47,438 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 551 transitions. [2020-04-18 07:32:47,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:47,439 INFO L105 Mcr]: ---- MCR iteration 17 ---- [2020-04-18 07:32:47,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:47,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 53 times [2020-04-18 07:32:47,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:47,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986145404] [2020-04-18 07:32:47,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:47,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986145404] [2020-04-18 07:32:47,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098984546] [2020-04-18 07:32:47,516 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:47,562 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 07:32:47,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:47,563 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:47,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:48,095 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:48,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:48,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:48,111 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:48,111 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:48,113 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 07:32:48,113 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:54,164 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:32:54,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:54,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4913, Invalid=16539, Unknown=10, NotChecked=0, Total=21462 [2020-04-18 07:32:54,165 INFO L87 Difference]: Start difference. First operand 365 states and 551 transitions. Second operand 15 states. [2020-04-18 07:32:55,891 WARN L192 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-04-18 07:32:56,364 WARN L192 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-04-18 07:32:57,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:57,064 INFO L93 Difference]: Finished difference Result 386 states and 564 transitions. [2020-04-18 07:32:57,064 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 564 transitions. [2020-04-18 07:32:57,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:32:57,065 INFO L105 Mcr]: ---- MCR iteration 18 ---- [2020-04-18 07:32:57,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:32:57,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 54 times [2020-04-18 07:32:57,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:32:57,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635110640] [2020-04-18 07:32:57,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:32:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:32:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:57,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635110640] [2020-04-18 07:32:57,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076034246] [2020-04-18 07:32:57,128 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:32:57,169 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 07:32:57,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:32:57,170 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:32:57,170 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:32:57,244 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:32:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:32:57,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:32:57,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:32:57,263 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:32:57,264 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:32:57,265 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 07:32:57,266 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:32:57,612 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:32:57,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:32:57,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6132, Invalid=21580, Unknown=10, NotChecked=0, Total=27722 [2020-04-18 07:32:57,614 INFO L87 Difference]: Start difference. First operand 386 states and 564 transitions. Second operand 15 states. [2020-04-18 07:32:58,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:32:58,678 INFO L93 Difference]: Finished difference Result 401 states and 577 transitions. [2020-04-18 07:32:58,678 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 577 transitions. [2020-04-18 07:32:58,679 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:32:58,680 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1902349013] [2020-04-18 07:32:58,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:32:58,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:32:58,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1902349013] [2020-04-18 07:32:58,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-04-18 07:32:58,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:32:58,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-04-18 07:32:58,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6930, Invalid=24922, Unknown=10, NotChecked=0, Total=31862 [2020-04-18 07:32:58,684 INFO L87 Difference]: Start difference. First operand 146 states and 374 transitions. Second operand 88 states. [2020-04-18 07:33:19,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:19,042 INFO L93 Difference]: Finished difference Result 506 states and 1181 transitions. [2020-04-18 07:33:19,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-04-18 07:33:19,043 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 13 [2020-04-18 07:33:19,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:33:19,047 INFO L225 Difference]: With dead ends: 506 [2020-04-18 07:33:19,047 INFO L226 Difference]: Without dead ends: 458 [2020-04-18 07:33:19,050 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 895 GetRequests, 575 SyntacticMatches, 73 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32524 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=13013, Invalid=48708, Unknown=31, NotChecked=0, Total=61752 [2020-04-18 07:33:19,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-04-18 07:33:19,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 172. [2020-04-18 07:33:19,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-04-18 07:33:19,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 470 transitions. [2020-04-18 07:33:19,060 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 470 transitions. Word has length 13 [2020-04-18 07:33:19,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:33:19,060 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 470 transitions. [2020-04-18 07:33:19,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-04-18 07:33:19,060 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 470 transitions. [2020-04-18 07:33:19,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:19,061 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:33:19,061 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:33:22,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:22,870 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:33:22,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:22,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 55 times [2020-04-18 07:33:22,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:33:22,871 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [1678367475] [2020-04-18 07:33:22,872 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:22,873 INFO L259 McrAutomatonBuilder]: Finished intersection with 70 states and 149 transitions. [2020-04-18 07:33:22,874 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2020-04-18 07:33:22,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:22,874 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:33:22,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:22,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148993, now seen corresponding path program 56 times [2020-04-18 07:33:22,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:22,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735505149] [2020-04-18 07:33:22,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:22,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735505149] [2020-04-18 07:33:22,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167399542] [2020-04-18 07:33:22,964 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:23,008 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:33:23,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:23,010 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:23,010 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:23,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:23,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:23,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:23,130 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:23,131 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:23,132 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2020-04-18 07:33:23,132 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:23,269 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:33:23,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:23,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:33:23,269 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 15 states. [2020-04-18 07:33:23,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:23,574 INFO L93 Difference]: Finished difference Result 106 states and 221 transitions. [2020-04-18 07:33:23,574 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 221 transitions. [2020-04-18 07:33:23,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:23,575 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:33:23,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:23,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 57 times [2020-04-18 07:33:23,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:23,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012265929] [2020-04-18 07:33:23,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:23,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012265929] [2020-04-18 07:33:23,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262852985] [2020-04-18 07:33:23,678 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:23,731 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 07:33:23,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:23,732 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:23,732 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:23,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:23,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:23,829 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:23,830 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:23,831 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 07:33:23,832 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:23,934 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:33:23,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:23,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2020-04-18 07:33:23,935 INFO L87 Difference]: Start difference. First operand 106 states and 221 transitions. Second operand 15 states. [2020-04-18 07:33:24,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:24,346 INFO L93 Difference]: Finished difference Result 117 states and 239 transitions. [2020-04-18 07:33:24,347 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 239 transitions. [2020-04-18 07:33:24,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:24,347 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:33:24,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:24,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 58 times [2020-04-18 07:33:24,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:24,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148258649] [2020-04-18 07:33:24,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:24,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148258649] [2020-04-18 07:33:24,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806742404] [2020-04-18 07:33:24,432 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:24,473 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:33:24,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:24,474 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:24,475 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:24,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:24,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:24,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:24,959 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:24,959 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:24,961 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2020-04-18 07:33:24,961 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:25,078 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:33:25,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:25,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=832, Unknown=0, NotChecked=0, Total=1190 [2020-04-18 07:33:25,079 INFO L87 Difference]: Start difference. First operand 117 states and 239 transitions. Second operand 15 states. [2020-04-18 07:33:25,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:25,520 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2020-04-18 07:33:25,520 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2020-04-18 07:33:25,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:25,521 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:33:25,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:25,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 59 times [2020-04-18 07:33:25,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:25,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995218422] [2020-04-18 07:33:25,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:25,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995218422] [2020-04-18 07:33:25,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676440682] [2020-04-18 07:33:25,638 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:25,707 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 07:33:25,708 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:25,709 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:25,710 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:26,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:26,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:26,425 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:26,425 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:26,427 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 07:33:26,427 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:26,488 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:26,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:26,655 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:33:26,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:33:26,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=1708, Unknown=0, NotChecked=0, Total=2352 [2020-04-18 07:33:26,655 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand 17 states. [2020-04-18 07:33:27,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:27,295 INFO L93 Difference]: Finished difference Result 156 states and 295 transitions. [2020-04-18 07:33:27,295 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 295 transitions. [2020-04-18 07:33:27,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:27,296 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:33:27,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:27,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 60 times [2020-04-18 07:33:27,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:27,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207825034] [2020-04-18 07:33:27,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:27,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:27,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207825034] [2020-04-18 07:33:27,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603476319] [2020-04-18 07:33:27,408 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:27,451 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:33:27,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:27,452 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:27,453 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:27,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:27,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:27,551 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:27,551 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:27,554 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-04-18 07:33:27,554 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:27,602 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:27,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:27,673 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:33:27,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:33:27,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=944, Invalid=2478, Unknown=0, NotChecked=0, Total=3422 [2020-04-18 07:33:27,674 INFO L87 Difference]: Start difference. First operand 156 states and 295 transitions. Second operand 17 states. [2020-04-18 07:33:28,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:28,256 INFO L93 Difference]: Finished difference Result 164 states and 302 transitions. [2020-04-18 07:33:28,256 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 302 transitions. [2020-04-18 07:33:28,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:28,257 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:33:28,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:28,257 INFO L82 PathProgramCache]: Analyzing trace with hash 9426703, now seen corresponding path program 61 times [2020-04-18 07:33:28,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:28,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430922529] [2020-04-18 07:33:28,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:28,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430922529] [2020-04-18 07:33:28,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510533872] [2020-04-18 07:33:28,378 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:28,428 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:28,428 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:28,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:28,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:28,566 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:28,567 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:28,569 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:33:28,569 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:28,625 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:33:28,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:28,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1096, Invalid=3064, Unknown=0, NotChecked=0, Total=4160 [2020-04-18 07:33:28,626 INFO L87 Difference]: Start difference. First operand 164 states and 302 transitions. Second operand 15 states. [2020-04-18 07:33:28,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:28,948 INFO L93 Difference]: Finished difference Result 182 states and 332 transitions. [2020-04-18 07:33:28,948 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 332 transitions. [2020-04-18 07:33:28,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:28,949 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:33:28,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:28,950 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 62 times [2020-04-18 07:33:28,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:28,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778462663] [2020-04-18 07:33:28,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:29,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778462663] [2020-04-18 07:33:29,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257071345] [2020-04-18 07:33:29,025 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:29,063 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:33:29,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:29,064 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:29,064 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:29,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:29,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:29,158 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:29,177 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:29,178 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:33:29,179 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:29,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:29,226 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:33:29,226 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:29,257 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:33:29,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:33:29,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1139, Invalid=3283, Unknown=0, NotChecked=0, Total=4422 [2020-04-18 07:33:29,258 INFO L87 Difference]: Start difference. First operand 182 states and 332 transitions. Second operand 17 states. [2020-04-18 07:33:29,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:29,883 INFO L93 Difference]: Finished difference Result 201 states and 361 transitions. [2020-04-18 07:33:29,883 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 361 transitions. [2020-04-18 07:33:29,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:29,883 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 07:33:29,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:29,884 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 63 times [2020-04-18 07:33:29,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:29,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31001684] [2020-04-18 07:33:29,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:29,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31001684] [2020-04-18 07:33:29,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762610299] [2020-04-18 07:33:29,973 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:30,016 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:33:30,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:30,017 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:30,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:30,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:30,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:30,477 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:30,478 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:30,479 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 07:33:30,480 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:30,483 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:30,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:30,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:30,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:30,581 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:30,614 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:33:30,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 07:33:30,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1278, Invalid=3978, Unknown=0, NotChecked=0, Total=5256 [2020-04-18 07:33:30,615 INFO L87 Difference]: Start difference. First operand 201 states and 361 transitions. Second operand 19 states. [2020-04-18 07:33:31,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:31,706 INFO L93 Difference]: Finished difference Result 237 states and 410 transitions. [2020-04-18 07:33:31,706 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 410 transitions. [2020-04-18 07:33:31,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:31,707 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 07:33:31,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:31,707 INFO L82 PathProgramCache]: Analyzing trace with hash 646656193, now seen corresponding path program 64 times [2020-04-18 07:33:31,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:31,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167426748] [2020-04-18 07:33:31,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:31,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167426748] [2020-04-18 07:33:31,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049247821] [2020-04-18 07:33:31,786 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:31,827 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:33:31,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:31,828 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:31,828 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:31,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:31,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:31,931 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:31,932 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:31,934 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 39 transitions. [2020-04-18 07:33:31,934 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:31,965 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:32,008 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:32,056 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:32,057 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:32,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:32,171 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:33:32,172 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:32,209 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 19 times. [2020-04-18 07:33:32,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 07:33:32,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1751, Invalid=5905, Unknown=0, NotChecked=0, Total=7656 [2020-04-18 07:33:32,211 INFO L87 Difference]: Start difference. First operand 237 states and 410 transitions. Second operand 20 states. [2020-04-18 07:33:32,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:32,849 INFO L93 Difference]: Finished difference Result 268 states and 455 transitions. [2020-04-18 07:33:32,849 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 455 transitions. [2020-04-18 07:33:32,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:32,850 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 07:33:32,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:32,851 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 65 times [2020-04-18 07:33:32,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:32,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768598074] [2020-04-18 07:33:32,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:32,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768598074] [2020-04-18 07:33:32,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388532213] [2020-04-18 07:33:32,907 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:32,944 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:33:32,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:32,945 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:32,946 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:33,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:33,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:33,035 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:33,036 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:33,037 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:33:33,037 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:33,111 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:33,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:33,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:33:33,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:33,269 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 9 times. [2020-04-18 07:33:33,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 07:33:33,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2112, Invalid=7200, Unknown=0, NotChecked=0, Total=9312 [2020-04-18 07:33:33,270 INFO L87 Difference]: Start difference. First operand 268 states and 455 transitions. Second operand 18 states. [2020-04-18 07:33:34,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:34,116 INFO L93 Difference]: Finished difference Result 284 states and 475 transitions. [2020-04-18 07:33:34,117 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 475 transitions. [2020-04-18 07:33:34,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:34,117 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 07:33:34,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:34,118 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 66 times [2020-04-18 07:33:34,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:34,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814542733] [2020-04-18 07:33:34,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:34,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814542733] [2020-04-18 07:33:34,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970968361] [2020-04-18 07:33:34,186 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:34,229 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:33:34,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:34,230 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:34,230 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:34,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:34,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:34,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:34,333 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:34,334 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:34,336 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-04-18 07:33:34,336 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:34,462 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:34,582 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 07:33:34,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:33:34,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2601, Invalid=8955, Unknown=0, NotChecked=0, Total=11556 [2020-04-18 07:33:34,583 INFO L87 Difference]: Start difference. First operand 284 states and 475 transitions. Second operand 16 states. [2020-04-18 07:33:35,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:35,462 INFO L93 Difference]: Finished difference Result 303 states and 492 transitions. [2020-04-18 07:33:35,462 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 492 transitions. [2020-04-18 07:33:35,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:35,463 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 07:33:35,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:35,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 67 times [2020-04-18 07:33:35,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:35,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140216094] [2020-04-18 07:33:35,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:35,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140216094] [2020-04-18 07:33:35,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885163255] [2020-04-18 07:33:35,558 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:35,617 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:35,617 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:36,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:36,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:36,351 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:36,352 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:36,353 INFO L259 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-04-18 07:33:36,353 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:36,433 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:33:36,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:33:36,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3020, Invalid=10552, Unknown=0, NotChecked=0, Total=13572 [2020-04-18 07:33:36,434 INFO L87 Difference]: Start difference. First operand 303 states and 492 transitions. Second operand 15 states. [2020-04-18 07:33:37,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:37,120 INFO L93 Difference]: Finished difference Result 326 states and 515 transitions. [2020-04-18 07:33:37,120 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 515 transitions. [2020-04-18 07:33:37,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:37,121 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 07:33:37,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:37,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 68 times [2020-04-18 07:33:37,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:37,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528558434] [2020-04-18 07:33:37,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:37,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528558434] [2020-04-18 07:33:37,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899883831] [2020-04-18 07:33:37,191 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:37,232 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:33:37,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:37,233 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:37,233 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:37,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:37,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:37,318 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:37,319 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:37,320 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 07:33:37,320 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:37,372 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:37,421 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:37,464 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 4 times. [2020-04-18 07:33:37,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:33:37,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3356, Invalid=11896, Unknown=0, NotChecked=0, Total=15252 [2020-04-18 07:33:37,466 INFO L87 Difference]: Start difference. First operand 326 states and 515 transitions. Second operand 17 states. [2020-04-18 07:33:38,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:38,424 INFO L93 Difference]: Finished difference Result 350 states and 530 transitions. [2020-04-18 07:33:38,424 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 530 transitions. [2020-04-18 07:33:38,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:38,425 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 07:33:38,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:38,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 69 times [2020-04-18 07:33:38,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:38,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106710674] [2020-04-18 07:33:38,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:38,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106710674] [2020-04-18 07:33:38,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916147132] [2020-04-18 07:33:38,514 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:38,574 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:33:38,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:38,575 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-18 07:33:38,576 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:38,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:38,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:38,678 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:38,678 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:38,680 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-04-18 07:33:38,680 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:38,776 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:38,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:38,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:38,991 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:39,034 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:33:39,035 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:39,072 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:33:39,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 07:33:39,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3977, Invalid=15763, Unknown=0, NotChecked=0, Total=19740 [2020-04-18 07:33:39,074 INFO L87 Difference]: Start difference. First operand 350 states and 530 transitions. Second operand 19 states. [2020-04-18 07:33:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:40,773 INFO L93 Difference]: Finished difference Result 370 states and 543 transitions. [2020-04-18 07:33:40,773 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 543 transitions. [2020-04-18 07:33:40,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-18 07:33:40,773 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 07:33:40,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:40,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 70 times [2020-04-18 07:33:40,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:40,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743278114] [2020-04-18 07:33:40,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:40,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743278114] [2020-04-18 07:33:40,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619786941] [2020-04-18 07:33:40,839 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:40,879 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:33:40,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:40,880 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:33:40,880 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:40,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:40,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-18 07:33:40,968 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:40,969 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:40,971 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-04-18 07:33:40,971 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:41,134 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:41,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:33:41,186 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:33:41,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 07:33:41,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5196, Invalid=20886, Unknown=0, NotChecked=0, Total=26082 [2020-04-18 07:33:41,188 INFO L87 Difference]: Start difference. First operand 370 states and 543 transitions. Second operand 16 states. [2020-04-18 07:33:42,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:42,134 INFO L93 Difference]: Finished difference Result 371 states and 543 transitions. [2020-04-18 07:33:42,135 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 543 transitions. [2020-04-18 07:33:42,135 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:33:42,136 INFO L354 FreeRefinementEngine]: Using interpolant generator StrategyModuleMcr [1678367475] [2020-04-18 07:33:42,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:33:42,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-04-18 07:33:42,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder StrategyModuleMcr [1678367475] [2020-04-18 07:33:42,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-04-18 07:33:42,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy MCR [2020-04-18 07:33:42,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-04-18 07:33:42,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5684, Invalid=22708, Unknown=0, NotChecked=0, Total=28392 [2020-04-18 07:33:42,138 INFO L87 Difference]: Start difference. First operand 172 states and 470 transitions. Second operand 86 states. [2020-04-18 07:33:46,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:46,682 INFO L93 Difference]: Finished difference Result 434 states and 1036 transitions. [2020-04-18 07:33:46,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-04-18 07:33:46,683 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 13 [2020-04-18 07:33:46,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:33:46,685 INFO L225 Difference]: With dead ends: 434 [2020-04-18 07:33:46,685 INFO L226 Difference]: Without dead ends: 410 [2020-04-18 07:33:46,688 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 419 SyntacticMatches, 56 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26006 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=9807, Invalid=40593, Unknown=0, NotChecked=0, Total=50400 [2020-04-18 07:33:46,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-04-18 07:33:46,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 191. [2020-04-18 07:33:46,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-04-18 07:33:46,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 514 transitions. [2020-04-18 07:33:46,696 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 514 transitions. Word has length 13 [2020-04-18 07:33:46,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:33:46,697 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 514 transitions. [2020-04-18 07:33:46,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-04-18 07:33:46,697 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 514 transitions. [2020-04-18 07:33:46,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:33:46,698 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:33:46,698 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:33:49,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:49,712 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 07:33:49,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:49,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 71 times [2020-04-18 07:33:49,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy MCR [2020-04-18 07:33:49,713 INFO L354 FreeRefinementEngine]: Using trace check StrategyModuleMcr [915485933] [2020-04-18 07:33:49,713 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:49,714 INFO L259 McrAutomatonBuilder]: Finished intersection with 86 states and 186 transitions. [2020-04-18 07:33:49,714 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2020-04-18 07:33:49,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:33:49,715 INFO L105 Mcr]: ---- MCR iteration 0 ---- [2020-04-18 07:33:49,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:49,715 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 72 times [2020-04-18 07:33:49,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:49,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015692003] [2020-04-18 07:33:49,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:49,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015692003] [2020-04-18 07:33:49,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482203571] [2020-04-18 07:33:49,817 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:49,882 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:33:49,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:49,883 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:33:49,883 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:50,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:50,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:33:50,032 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:50,032 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:50,034 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-04-18 07:33:50,035 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:50,203 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:33:50,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:33:50,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-18 07:33:50,204 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 17 states. [2020-04-18 07:33:50,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:50,585 INFO L93 Difference]: Finished difference Result 130 states and 277 transitions. [2020-04-18 07:33:50,585 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 277 transitions. [2020-04-18 07:33:50,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:33:50,586 INFO L105 Mcr]: ---- MCR iteration 1 ---- [2020-04-18 07:33:50,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:50,586 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 73 times [2020-04-18 07:33:50,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:50,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579690105] [2020-04-18 07:33:50,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:50,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579690105] [2020-04-18 07:33:50,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849722278] [2020-04-18 07:33:50,720 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:50,770 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:33:50,770 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:55,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:55,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:55,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:33:55,562 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:55,563 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:55,565 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 33 transitions. [2020-04-18 07:33:55,565 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:56,616 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-04-18 07:33:56,617 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:33:56,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:33:56,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=434, Unknown=1, NotChecked=0, Total=650 [2020-04-18 07:33:56,618 INFO L87 Difference]: Start difference. First operand 130 states and 277 transitions. Second operand 17 states. [2020-04-18 07:33:57,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:57,111 INFO L93 Difference]: Finished difference Result 146 states and 302 transitions. [2020-04-18 07:33:57,111 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 302 transitions. [2020-04-18 07:33:57,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:33:57,111 INFO L105 Mcr]: ---- MCR iteration 2 ---- [2020-04-18 07:33:57,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:57,112 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 74 times [2020-04-18 07:33:57,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:57,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498920813] [2020-04-18 07:33:57,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:33:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:33:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:57,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498920813] [2020-04-18 07:33:57,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092688491] [2020-04-18 07:33:57,209 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:33:57,251 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:33:57,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:33:57,252 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:33:57,253 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:33:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:33:59,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:33:59,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:33:59,090 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:33:59,090 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:33:59,092 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-04-18 07:33:59,092 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:33:59,288 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 8 times. [2020-04-18 07:33:59,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:33:59,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=845, Unknown=1, NotChecked=0, Total=1260 [2020-04-18 07:33:59,289 INFO L87 Difference]: Start difference. First operand 146 states and 302 transitions. Second operand 17 states. [2020-04-18 07:33:59,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:33:59,997 INFO L93 Difference]: Finished difference Result 156 states and 315 transitions. [2020-04-18 07:33:59,997 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 315 transitions. [2020-04-18 07:33:59,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:33:59,998 INFO L105 Mcr]: ---- MCR iteration 3 ---- [2020-04-18 07:33:59,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:33:59,998 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 75 times [2020-04-18 07:33:59,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:33:59,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136204369] [2020-04-18 07:33:59,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:00,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136204369] [2020-04-18 07:34:00,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770399181] [2020-04-18 07:34:00,126 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:00,181 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:34:00,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:00,182 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:00,184 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:00,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:00,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:34:00,410 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:00,412 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:00,444 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-04-18 07:34:00,445 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:03,415 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:34:03,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:34:03,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=663, Invalid=1494, Unknown=5, NotChecked=0, Total=2162 [2020-04-18 07:34:03,416 INFO L87 Difference]: Start difference. First operand 156 states and 315 transitions. Second operand 17 states. [2020-04-18 07:34:04,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:04,897 INFO L93 Difference]: Finished difference Result 169 states and 330 transitions. [2020-04-18 07:34:04,897 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 330 transitions. [2020-04-18 07:34:04,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:04,897 INFO L105 Mcr]: ---- MCR iteration 4 ---- [2020-04-18 07:34:04,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:04,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 76 times [2020-04-18 07:34:04,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:04,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540855498] [2020-04-18 07:34:04,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:05,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:05,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540855498] [2020-04-18 07:34:05,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668500165] [2020-04-18 07:34:05,014 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:05,057 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:34:05,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:05,058 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:05,059 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:05,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:05,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:34:05,175 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:05,176 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:05,178 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 34 transitions. [2020-04-18 07:34:05,178 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:05,287 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:07,152 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:34:07,152 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:07,177 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:34:07,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 07:34:07,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3028, Unknown=11, NotChecked=0, Total=4160 [2020-04-18 07:34:07,178 INFO L87 Difference]: Start difference. First operand 169 states and 330 transitions. Second operand 19 states. [2020-04-18 07:34:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:08,012 INFO L93 Difference]: Finished difference Result 207 states and 383 transitions. [2020-04-18 07:34:08,013 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 383 transitions. [2020-04-18 07:34:08,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:08,013 INFO L105 Mcr]: ---- MCR iteration 5 ---- [2020-04-18 07:34:08,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:08,014 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 77 times [2020-04-18 07:34:08,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:08,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928075265] [2020-04-18 07:34:08,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:08,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928075265] [2020-04-18 07:34:08,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214037642] [2020-04-18 07:34:08,127 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:08,170 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 07:34:08,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:08,171 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:08,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:08,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:08,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:34:08,297 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:08,297 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:08,299 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 34 transitions. [2020-04-18 07:34:08,300 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:08,360 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 14 times. [2020-04-18 07:34:08,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:34:08,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1440, Invalid=3951, Unknown=11, NotChecked=0, Total=5402 [2020-04-18 07:34:08,361 INFO L87 Difference]: Start difference. First operand 207 states and 383 transitions. Second operand 17 states. [2020-04-18 07:34:08,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:08,750 INFO L93 Difference]: Finished difference Result 238 states and 445 transitions. [2020-04-18 07:34:08,750 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 445 transitions. [2020-04-18 07:34:08,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:08,751 INFO L105 Mcr]: ---- MCR iteration 6 ---- [2020-04-18 07:34:08,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:08,751 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 78 times [2020-04-18 07:34:08,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:08,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555163932] [2020-04-18 07:34:08,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:08,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555163932] [2020-04-18 07:34:08,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632670228] [2020-04-18 07:34:08,888 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:08,929 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:34:08,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:08,930 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:08,930 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:09,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:09,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:34:09,730 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:09,731 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:09,733 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 32 transitions. [2020-04-18 07:34:09,733 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:10,632 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:34:10,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:34:10,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1440, Invalid=3951, Unknown=11, NotChecked=0, Total=5402 [2020-04-18 07:34:10,632 INFO L87 Difference]: Start difference. First operand 238 states and 445 transitions. Second operand 17 states. [2020-04-18 07:34:11,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:11,153 INFO L93 Difference]: Finished difference Result 250 states and 462 transitions. [2020-04-18 07:34:11,153 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 462 transitions. [2020-04-18 07:34:11,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:11,153 INFO L105 Mcr]: ---- MCR iteration 7 ---- [2020-04-18 07:34:11,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:11,154 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 79 times [2020-04-18 07:34:11,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:11,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274035461] [2020-04-18 07:34:11,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:11,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274035461] [2020-04-18 07:34:11,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410921154] [2020-04-18 07:34:11,247 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:11,292 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:11,292 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:17,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:17,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:34:17,738 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:17,739 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:17,741 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-04-18 07:34:17,741 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:17,844 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:34:17,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:34:17,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1440, Invalid=3951, Unknown=11, NotChecked=0, Total=5402 [2020-04-18 07:34:17,845 INFO L87 Difference]: Start difference. First operand 250 states and 462 transitions. Second operand 17 states. [2020-04-18 07:34:18,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:18,534 INFO L93 Difference]: Finished difference Result 257 states and 469 transitions. [2020-04-18 07:34:18,534 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 469 transitions. [2020-04-18 07:34:18,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:18,535 INFO L105 Mcr]: ---- MCR iteration 8 ---- [2020-04-18 07:34:18,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:18,535 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 80 times [2020-04-18 07:34:18,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:18,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510493342] [2020-04-18 07:34:18,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:18,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510493342] [2020-04-18 07:34:18,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425970769] [2020-04-18 07:34:18,633 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:18,677 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:34:18,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:18,678 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:18,679 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:18,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:18,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:34:18,804 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:18,805 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:18,807 INFO L259 McrAutomatonBuilder]: Finished intersection with 23 states and 30 transitions. [2020-04-18 07:34:18,807 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:18,811 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:18,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2020-04-18 07:34:18,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:18,905 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 10 times. [2020-04-18 07:34:18,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 07:34:18,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1515, Invalid=4326, Unknown=11, NotChecked=0, Total=5852 [2020-04-18 07:34:18,906 INFO L87 Difference]: Start difference. First operand 257 states and 469 transitions. Second operand 19 states. [2020-04-18 07:34:20,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:20,029 INFO L93 Difference]: Finished difference Result 293 states and 527 transitions. [2020-04-18 07:34:20,029 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 527 transitions. [2020-04-18 07:34:20,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:20,030 INFO L105 Mcr]: ---- MCR iteration 9 ---- [2020-04-18 07:34:20,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:20,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 81 times [2020-04-18 07:34:20,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:20,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526297351] [2020-04-18 07:34:20,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:20,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:20,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526297351] [2020-04-18 07:34:20,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172027168] [2020-04-18 07:34:20,137 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:20,182 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:34:20,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:20,183 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:20,184 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:20,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:20,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:34:20,309 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:20,310 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:20,312 INFO L259 McrAutomatonBuilder]: Finished intersection with 27 states and 38 transitions. [2020-04-18 07:34:20,312 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:20,381 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 18 times. [2020-04-18 07:34:20,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:34:20,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1701, Invalid=5260, Unknown=11, NotChecked=0, Total=6972 [2020-04-18 07:34:20,382 INFO L87 Difference]: Start difference. First operand 293 states and 527 transitions. Second operand 17 states. [2020-04-18 07:34:20,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:20,827 INFO L93 Difference]: Finished difference Result 307 states and 552 transitions. [2020-04-18 07:34:20,827 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 552 transitions. [2020-04-18 07:34:20,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:20,828 INFO L105 Mcr]: ---- MCR iteration 10 ---- [2020-04-18 07:34:20,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:20,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 82 times [2020-04-18 07:34:20,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:20,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595577868] [2020-04-18 07:34:20,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:20,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595577868] [2020-04-18 07:34:20,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538433804] [2020-04-18 07:34:20,942 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:20,987 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:34:20,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:20,988 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:20,988 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:25,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:25,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:34:25,239 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:25,240 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:25,242 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 36 transitions. [2020-04-18 07:34:25,242 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:26,276 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 07:34:26,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:34:26,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1701, Invalid=5260, Unknown=11, NotChecked=0, Total=6972 [2020-04-18 07:34:26,277 INFO L87 Difference]: Start difference. First operand 307 states and 552 transitions. Second operand 17 states. [2020-04-18 07:34:26,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:26,785 INFO L93 Difference]: Finished difference Result 315 states and 561 transitions. [2020-04-18 07:34:26,785 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 561 transitions. [2020-04-18 07:34:26,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:26,785 INFO L105 Mcr]: ---- MCR iteration 11 ---- [2020-04-18 07:34:26,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:26,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 83 times [2020-04-18 07:34:26,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:26,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126510947] [2020-04-18 07:34:26,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:26,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126510947] [2020-04-18 07:34:26,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174511958] [2020-04-18 07:34:26,866 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:26,905 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 07:34:26,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:26,906 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:26,906 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:27,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:27,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:27,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:34:27,575 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:27,576 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:27,578 INFO L259 McrAutomatonBuilder]: Finished intersection with 26 states and 36 transitions. [2020-04-18 07:34:27,578 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:27,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:27,728 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:27,767 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 16 times. [2020-04-18 07:34:27,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 07:34:27,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1767, Invalid=5532, Unknown=11, NotChecked=0, Total=7310 [2020-04-18 07:34:27,768 INFO L87 Difference]: Start difference. First operand 315 states and 561 transitions. Second operand 19 states. [2020-04-18 07:34:28,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:28,983 INFO L93 Difference]: Finished difference Result 342 states and 599 transitions. [2020-04-18 07:34:28,983 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 599 transitions. [2020-04-18 07:34:28,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:28,984 INFO L105 Mcr]: ---- MCR iteration 12 ---- [2020-04-18 07:34:28,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:28,984 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 84 times [2020-04-18 07:34:28,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:28,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593937353] [2020-04-18 07:34:28,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:29,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593937353] [2020-04-18 07:34:29,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208340106] [2020-04-18 07:34:29,080 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:29,123 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:34:29,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:29,124 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:29,124 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:29,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:29,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:34:29,263 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:29,264 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:29,266 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 42 transitions. [2020-04-18 07:34:29,266 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:29,343 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 22 times. [2020-04-18 07:34:29,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:34:29,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1948, Invalid=6413, Unknown=11, NotChecked=0, Total=8372 [2020-04-18 07:34:29,344 INFO L87 Difference]: Start difference. First operand 342 states and 599 transitions. Second operand 17 states. [2020-04-18 07:34:29,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:29,828 INFO L93 Difference]: Finished difference Result 351 states and 613 transitions. [2020-04-18 07:34:29,828 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 613 transitions. [2020-04-18 07:34:29,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:29,829 INFO L105 Mcr]: ---- MCR iteration 13 ---- [2020-04-18 07:34:29,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:29,829 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 85 times [2020-04-18 07:34:29,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:29,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077544472] [2020-04-18 07:34:29,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:29,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077544472] [2020-04-18 07:34:29,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611091095] [2020-04-18 07:34:29,924 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:29,963 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:29,964 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:30,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:30,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:34:30,103 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:30,104 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:30,106 INFO L259 McrAutomatonBuilder]: Finished intersection with 29 states and 42 transitions. [2020-04-18 07:34:30,106 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:30,113 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:30,113 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:30,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:30,665 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 22 times. [2020-04-18 07:34:30,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 07:34:30,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2029, Invalid=6702, Unknown=11, NotChecked=0, Total=8742 [2020-04-18 07:34:30,666 INFO L87 Difference]: Start difference. First operand 351 states and 613 transitions. Second operand 19 states. [2020-04-18 07:34:31,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:31,646 INFO L93 Difference]: Finished difference Result 375 states and 642 transitions. [2020-04-18 07:34:31,646 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 642 transitions. [2020-04-18 07:34:31,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:31,646 INFO L105 Mcr]: ---- MCR iteration 14 ---- [2020-04-18 07:34:31,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:31,647 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 86 times [2020-04-18 07:34:31,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:31,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912285889] [2020-04-18 07:34:31,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:31,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:31,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912285889] [2020-04-18 07:34:31,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081715026] [2020-04-18 07:34:31,735 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:31,776 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:34:31,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:31,777 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:31,778 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:31,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:31,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:34:31,915 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:31,916 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:31,918 INFO L259 McrAutomatonBuilder]: Finished intersection with 33 states and 50 transitions. [2020-04-18 07:34:31,918 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:31,958 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:32,000 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:32,001 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:32,072 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:32,115 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 29 times. [2020-04-18 07:34:32,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 07:34:32,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2344, Invalid=7947, Unknown=11, NotChecked=0, Total=10302 [2020-04-18 07:34:32,116 INFO L87 Difference]: Start difference. First operand 375 states and 642 transitions. Second operand 20 states. [2020-04-18 07:34:32,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:32,789 INFO L93 Difference]: Finished difference Result 423 states and 717 transitions. [2020-04-18 07:34:32,790 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 717 transitions. [2020-04-18 07:34:32,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:32,790 INFO L105 Mcr]: ---- MCR iteration 15 ---- [2020-04-18 07:34:32,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:32,791 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 87 times [2020-04-18 07:34:32,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:32,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557413525] [2020-04-18 07:34:32,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:32,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557413525] [2020-04-18 07:34:32,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002199291] [2020-04-18 07:34:32,864 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:32,908 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:34:32,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:32,909 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:32,909 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:34:39,574 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-18 07:34:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:39,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:34:39,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-18 07:34:39,576 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:34:39,577 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:34:39,580 INFO L259 McrAutomatonBuilder]: Finished intersection with 28 states and 40 transitions. [2020-04-18 07:34:39,580 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:34:39,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:34:42,561 WARN L192 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-04-18 07:34:50,709 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 19 times. [2020-04-18 07:34:50,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 07:34:50,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2659, Invalid=8886, Unknown=11, NotChecked=0, Total=11556 [2020-04-18 07:34:50,710 INFO L87 Difference]: Start difference. First operand 423 states and 717 transitions. Second operand 18 states. [2020-04-18 07:34:54,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:34:54,001 INFO L93 Difference]: Finished difference Result 453 states and 767 transitions. [2020-04-18 07:34:54,001 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 767 transitions. [2020-04-18 07:34:54,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:34:54,002 INFO L105 Mcr]: ---- MCR iteration 16 ---- [2020-04-18 07:34:54,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:34:54,002 INFO L82 PathProgramCache]: Analyzing trace with hash -743033653, now seen corresponding path program 88 times [2020-04-18 07:34:54,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:34:54,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755006007] [2020-04-18 07:34:54,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:34:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:34:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:34:54,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755006007] [2020-04-18 07:34:54,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169859528] [2020-04-18 07:34:54,093 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:34:54,134 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:34:54,134 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:34:54,135 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:34:54,135 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:02,382 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-18 07:35:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:02,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:02,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-18 07:35:02,384 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:02,384 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:02,386 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 32 transitions. [2020-04-18 07:35:02,386 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:14,803 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:35:14,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:35:14,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3127, Invalid=10431, Unknown=14, NotChecked=0, Total=13572 [2020-04-18 07:35:14,804 INFO L87 Difference]: Start difference. First operand 453 states and 767 transitions. Second operand 17 states. [2020-04-18 07:35:16,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:16,678 INFO L93 Difference]: Finished difference Result 475 states and 794 transitions. [2020-04-18 07:35:16,678 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 794 transitions. [2020-04-18 07:35:16,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:16,679 INFO L105 Mcr]: ---- MCR iteration 17 ---- [2020-04-18 07:35:16,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:16,679 INFO L82 PathProgramCache]: Analyzing trace with hash -742370563, now seen corresponding path program 89 times [2020-04-18 07:35:16,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:16,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899065929] [2020-04-18 07:35:16,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:16,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:16,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899065929] [2020-04-18 07:35:16,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699639931] [2020-04-18 07:35:16,753 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:16,794 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 07:35:16,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:16,795 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:16,796 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:17,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:17,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-18 07:35:17,467 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:17,468 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:17,470 INFO L259 McrAutomatonBuilder]: Finished intersection with 25 states and 34 transitions. [2020-04-18 07:35:17,470 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:17,606 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:17,606 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:18,968 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 13 times. [2020-04-18 07:35:18,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 07:35:18,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3785, Invalid=12456, Unknown=15, NotChecked=0, Total=16256 [2020-04-18 07:35:18,969 INFO L87 Difference]: Start difference. First operand 475 states and 794 transitions. Second operand 18 states. [2020-04-18 07:35:21,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:21,088 INFO L93 Difference]: Finished difference Result 495 states and 823 transitions. [2020-04-18 07:35:21,088 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 823 transitions. [2020-04-18 07:35:21,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:21,088 INFO L105 Mcr]: ---- MCR iteration 18 ---- [2020-04-18 07:35:21,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:21,089 INFO L82 PathProgramCache]: Analyzing trace with hash -742319413, now seen corresponding path program 90 times [2020-04-18 07:35:21,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:21,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777448788] [2020-04-18 07:35:21,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:21,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:21,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777448788] [2020-04-18 07:35:21,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999765739] [2020-04-18 07:35:21,163 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:21,202 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 07:35:21,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:21,203 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:21,204 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:21,357 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:21,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:21,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:35:21,372 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:21,373 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:21,375 INFO L259 McrAutomatonBuilder]: Finished intersection with 24 states and 32 transitions. [2020-04-18 07:35:21,375 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:22,309 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 12 times. [2020-04-18 07:35:22,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:35:22,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4730, Invalid=15559, Unknown=17, NotChecked=0, Total=20306 [2020-04-18 07:35:22,310 INFO L87 Difference]: Start difference. First operand 495 states and 823 transitions. Second operand 17 states. [2020-04-18 07:35:28,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:28,210 INFO L93 Difference]: Finished difference Result 540 states and 879 transitions. [2020-04-18 07:35:28,211 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 879 transitions. [2020-04-18 07:35:28,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:28,211 INFO L105 Mcr]: ---- MCR iteration 19 ---- [2020-04-18 07:35:28,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:28,211 INFO L82 PathProgramCache]: Analyzing trace with hash 95285087, now seen corresponding path program 91 times [2020-04-18 07:35:28,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:28,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510543035] [2020-04-18 07:35:28,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:28,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:28,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510543035] [2020-04-18 07:35:28,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719917026] [2020-04-18 07:35:28,310 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:28,367 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:28,368 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:28,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:28,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:35:28,507 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:28,508 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:28,509 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2020-04-18 07:35:28,510 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:29,626 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:35:29,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:35:29,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5689, Invalid=19411, Unknown=22, NotChecked=0, Total=25122 [2020-04-18 07:35:29,627 INFO L87 Difference]: Start difference. First operand 540 states and 879 transitions. Second operand 17 states. [2020-04-18 07:35:32,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:32,308 INFO L93 Difference]: Finished difference Result 554 states and 889 transitions. [2020-04-18 07:35:32,309 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 889 transitions. [2020-04-18 07:35:32,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:32,310 INFO L105 Mcr]: ---- MCR iteration 20 ---- [2020-04-18 07:35:32,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:32,310 INFO L82 PathProgramCache]: Analyzing trace with hash 115840877, now seen corresponding path program 92 times [2020-04-18 07:35:32,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:32,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566801768] [2020-04-18 07:35:32,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:32,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:32,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566801768] [2020-04-18 07:35:32,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642924860] [2020-04-18 07:35:32,392 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:32,433 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:35:32,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:32,434 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:32,434 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:32,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:32,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:35:32,551 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:32,552 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:32,553 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2020-04-18 07:35:32,553 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:32,771 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:35:32,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:35:32,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6682, Invalid=22708, Unknown=22, NotChecked=0, Total=29412 [2020-04-18 07:35:32,773 INFO L87 Difference]: Start difference. First operand 554 states and 889 transitions. Second operand 17 states. [2020-04-18 07:35:34,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:34,943 INFO L93 Difference]: Finished difference Result 573 states and 908 transitions. [2020-04-18 07:35:34,944 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 908 transitions. [2020-04-18 07:35:34,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:34,945 INFO L105 Mcr]: ---- MCR iteration 21 ---- [2020-04-18 07:35:34,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:34,945 INFO L82 PathProgramCache]: Analyzing trace with hash 116503967, now seen corresponding path program 93 times [2020-04-18 07:35:34,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:34,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211004428] [2020-04-18 07:35:34,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:35,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211004428] [2020-04-18 07:35:35,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101198900] [2020-04-18 07:35:35,024 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:35,067 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:35:35,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:35,068 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:35,068 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:35,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:35,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:35:35,184 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:35,185 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:35,187 INFO L259 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-04-18 07:35:35,187 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:35,398 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:35,449 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 7 times. [2020-04-18 07:35:35,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 07:35:35,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7803, Invalid=26584, Unknown=23, NotChecked=0, Total=34410 [2020-04-18 07:35:35,451 INFO L87 Difference]: Start difference. First operand 573 states and 908 transitions. Second operand 18 states. [2020-04-18 07:35:37,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:37,753 INFO L93 Difference]: Finished difference Result 586 states and 919 transitions. [2020-04-18 07:35:37,753 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 919 transitions. [2020-04-18 07:35:37,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:37,754 INFO L105 Mcr]: ---- MCR iteration 22 ---- [2020-04-18 07:35:37,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:37,755 INFO L82 PathProgramCache]: Analyzing trace with hash 116555117, now seen corresponding path program 94 times [2020-04-18 07:35:37,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:37,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444445477] [2020-04-18 07:35:37,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:37,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444445477] [2020-04-18 07:35:37,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177879041] [2020-04-18 07:35:37,838 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:37,881 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:35:37,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:37,882 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:37,882 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:38,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:38,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:38,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:35:38,197 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:38,198 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:38,199 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2020-04-18 07:35:38,200 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:44,628 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:35:44,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:35:44,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9222, Invalid=31750, Unknown=34, NotChecked=0, Total=41006 [2020-04-18 07:35:44,630 INFO L87 Difference]: Start difference. First operand 586 states and 919 transitions. Second operand 17 states. [2020-04-18 07:35:45,284 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-04-18 07:35:48,349 WARN L192 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-04-18 07:35:53,898 WARN L192 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2020-04-18 07:35:56,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:35:56,287 INFO L93 Difference]: Finished difference Result 599 states and 931 transitions. [2020-04-18 07:35:56,287 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 931 transitions. [2020-04-18 07:35:56,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:35:56,288 INFO L105 Mcr]: ---- MCR iteration 23 ---- [2020-04-18 07:35:56,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:35:56,289 INFO L82 PathProgramCache]: Analyzing trace with hash 117448847, now seen corresponding path program 95 times [2020-04-18 07:35:56,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:35:56,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112041734] [2020-04-18 07:35:56,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:35:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:35:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:56,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112041734] [2020-04-18 07:35:56,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050670710] [2020-04-18 07:35:56,388 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:35:56,431 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 07:35:56,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:35:56,432 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:35:56,433 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:35:56,523 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:35:56,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:35:56,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:35:56,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:35:56,532 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:35:56,533 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:35:56,535 INFO L259 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2020-04-18 07:35:56,535 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:35:57,864 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 6 times. [2020-04-18 07:35:57,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:35:57,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11115, Invalid=39245, Unknown=40, NotChecked=0, Total=50400 [2020-04-18 07:35:57,867 INFO L87 Difference]: Start difference. First operand 599 states and 931 transitions. Second operand 17 states. [2020-04-18 07:36:12,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:36:12,964 INFO L93 Difference]: Finished difference Result 627 states and 956 transitions. [2020-04-18 07:36:12,965 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 956 transitions. [2020-04-18 07:36:12,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:36:12,966 INFO L105 Mcr]: ---- MCR iteration 24 ---- [2020-04-18 07:36:12,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:36:12,966 INFO L82 PathProgramCache]: Analyzing trace with hash 313362251, now seen corresponding path program 96 times [2020-04-18 07:36:12,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:36:12,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749217371] [2020-04-18 07:36:12,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:36:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:36:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:36:13,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749217371] [2020-04-18 07:36:13,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192072959] [2020-04-18 07:36:13,042 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:36:13,081 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 07:36:13,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:36:13,082 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:36:13,083 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:36:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:36:13,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:36:13,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:36:13,207 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:36:13,208 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:36:13,209 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-04-18 07:36:13,209 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:36:13,383 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:36:13,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:36:13,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13533, Invalid=49160, Unknown=57, NotChecked=0, Total=62750 [2020-04-18 07:36:13,386 INFO L87 Difference]: Start difference. First operand 627 states and 956 transitions. Second operand 17 states. [2020-04-18 07:36:13,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:36:13,912 INFO L93 Difference]: Finished difference Result 644 states and 969 transitions. [2020-04-18 07:36:13,913 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 969 transitions. [2020-04-18 07:36:13,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:36:13,913 INFO L105 Mcr]: ---- MCR iteration 25 ---- [2020-04-18 07:36:13,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:36:13,914 INFO L82 PathProgramCache]: Analyzing trace with hash 950591741, now seen corresponding path program 97 times [2020-04-18 07:36:13,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:36:13,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379442922] [2020-04-18 07:36:13,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:36:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:36:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:36:13,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379442922] [2020-04-18 07:36:13,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640130087] [2020-04-18 07:36:13,982 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:36:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:36:14,019 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:36:14,020 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:36:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:36:14,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:36:14,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:36:14,138 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:36:14,139 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:36:14,140 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-04-18 07:36:14,140 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:36:14,334 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:36:14,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:36:14,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13855, Invalid=50858, Unknown=57, NotChecked=0, Total=64770 [2020-04-18 07:36:14,338 INFO L87 Difference]: Start difference. First operand 644 states and 969 transitions. Second operand 17 states. [2020-04-18 07:36:15,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:36:15,287 INFO L93 Difference]: Finished difference Result 657 states and 978 transitions. [2020-04-18 07:36:15,288 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 978 transitions. [2020-04-18 07:36:15,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:36:15,289 INFO L105 Mcr]: ---- MCR iteration 26 ---- [2020-04-18 07:36:15,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:36:15,289 INFO L82 PathProgramCache]: Analyzing trace with hash 971147531, now seen corresponding path program 98 times [2020-04-18 07:36:15,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:36:15,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710064343] [2020-04-18 07:36:15,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:36:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:36:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:36:15,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710064343] [2020-04-18 07:36:15,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821693321] [2020-04-18 07:36:15,358 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:36:15,395 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:36:15,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:36:15,395 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 07:36:15,396 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:36:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:36:15,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:36:15,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-18 07:36:15,503 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:36:15,504 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:36:15,506 INFO L259 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-04-18 07:36:15,507 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:36:15,759 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 2 times. [2020-04-18 07:36:15,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:36:15,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14845, Invalid=55058, Unknown=57, NotChecked=0, Total=69960 [2020-04-18 07:36:15,762 INFO L87 Difference]: Start difference. First operand 657 states and 978 transitions. Second operand 17 states. [2020-04-18 07:36:16,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:36:16,931 INFO L93 Difference]: Finished difference Result 667 states and 986 transitions. [2020-04-18 07:36:16,931 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 986 transitions. [2020-04-18 07:36:16,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-18 07:36:16,932 INFO L105 Mcr]: ---- MCR iteration 27 ---- [2020-04-18 07:36:16,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:36:16,932 INFO L82 PathProgramCache]: Analyzing trace with hash 971810621, now seen corresponding path program 99 times [2020-04-18 07:36:16,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:36:16,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807262522] [2020-04-18 07:36:16,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:36:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:36:17,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:36:17,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807262522] [2020-04-18 07:36:17,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82061641] [2020-04-18 07:36:17,006 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:36:17,050 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-18 07:36:17,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:36:17,051 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-18 07:36:17,051 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:36:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:36:17,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:36:17,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-04-18 07:36:17,143 INFO L201 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-04-18 07:36:17,144 INFO L256 McrAutomatonBuilder]: Started intersection. [2020-04-18 07:36:17,146 INFO L259 McrAutomatonBuilder]: Finished intersection with 20 states and 24 transitions. [2020-04-18 07:36:17,146 INFO L282 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-04-18 07:36:17,405 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:36:17,405 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 07:36:17,686 INFO L356 McrAutomatonBuilder]: Construction finished. Needed to calculate wp 3 times. [2020-04-18 07:36:17,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:36:17,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16597, Invalid=63152, Unknown=57, NotChecked=0, Total=79806 [2020-04-18 07:36:17,689 INFO L87 Difference]: Start difference. First operand 667 states and 986 transitions. Second operand 17 states. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown