/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 03:13:21,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 03:13:21,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 03:13:21,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 03:13:21,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 03:13:21,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 03:13:21,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 03:13:21,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 03:13:21,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 03:13:21,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 03:13:21,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 03:13:21,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 03:13:21,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 03:13:21,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 03:13:21,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 03:13:21,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 03:13:21,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 03:13:21,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 03:13:21,061 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 03:13:21,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 03:13:21,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 03:13:21,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 03:13:21,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 03:13:21,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 03:13:21,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 03:13:21,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 03:13:21,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 03:13:21,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 03:13:21,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 03:13:21,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 03:13:21,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 03:13:21,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 03:13:21,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 03:13:21,075 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 03:13:21,076 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 03:13:21,076 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 03:13:21,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 03:13:21,077 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 03:13:21,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 03:13:21,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 03:13:21,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 03:13:21,080 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2020-04-18 03:13:21,096 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 03:13:21,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 03:13:21,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 03:13:21,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 03:13:21,100 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 03:13:21,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 03:13:21,100 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 03:13:21,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 03:13:21,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 03:13:21,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 03:13:21,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 03:13:21,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 03:13:21,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 03:13:21,101 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 03:13:21,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 03:13:21,102 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 03:13:21,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 03:13:21,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 03:13:21,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 03:13:21,103 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 03:13:21,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 03:13:21,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 03:13:21,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 03:13:21,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 03:13:21,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 03:13:21,105 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-18 03:13:21,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 03:13:21,105 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-04-18 03:13:21,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 03:13:21,106 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 03:13:21,412 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 03:13:21,425 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 03:13:21,429 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 03:13:21,430 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 03:13:21,431 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 03:13:21,432 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-04-18 03:13:21,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7b60d1ee/c456149c5cf34927ac6d286342b13b68/FLAG46a408ae1 [2020-04-18 03:13:22,115 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 03:13:22,116 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-04-18 03:13:22,130 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7b60d1ee/c456149c5cf34927ac6d286342b13b68/FLAG46a408ae1 [2020-04-18 03:13:22,386 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7b60d1ee/c456149c5cf34927ac6d286342b13b68 [2020-04-18 03:13:22,399 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 03:13:22,416 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 03:13:22,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 03:13:22,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 03:13:22,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 03:13:22,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 03:13:22" (1/1) ... [2020-04-18 03:13:22,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@df339b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:22, skipping insertion in model container [2020-04-18 03:13:22,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 03:13:22" (1/1) ... [2020-04-18 03:13:22,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 03:13:22,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 03:13:22,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 03:13:22,939 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 03:13:23,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 03:13:23,112 INFO L208 MainTranslator]: Completed translation [2020-04-18 03:13:23,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23 WrapperNode [2020-04-18 03:13:23,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 03:13:23,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 03:13:23,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 03:13:23,114 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 03:13:23,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 03:13:23,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 03:13:23,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 03:13:23,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 03:13:23,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,209 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... [2020-04-18 03:13:23,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 03:13:23,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 03:13:23,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 03:13:23,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 03:13:23,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 03:13:23,282 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-18 03:13:23,283 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-18 03:13:23,283 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-18 03:13:23,283 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-18 03:13:23,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 03:13:23,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-18 03:13:23,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 03:13:23,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 03:13:23,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-18 03:13:23,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 03:13:23,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 03:13:23,287 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 03:13:23,680 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 03:13:23,680 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-18 03:13:23,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 03:13:23 BoogieIcfgContainer [2020-04-18 03:13:23,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 03:13:23,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 03:13:23,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 03:13:23,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 03:13:23,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 03:13:22" (1/3) ... [2020-04-18 03:13:23,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23cc44c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 03:13:23, skipping insertion in model container [2020-04-18 03:13:23,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 03:13:23" (2/3) ... [2020-04-18 03:13:23,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23cc44c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 03:13:23, skipping insertion in model container [2020-04-18 03:13:23,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 03:13:23" (3/3) ... [2020-04-18 03:13:23,693 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2020-04-18 03:13:23,704 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 03:13:23,704 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 03:13:23,712 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 03:13:23,713 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 03:13:23,739 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,739 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,739 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,740 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,740 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,741 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,741 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,741 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,742 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,742 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,743 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,743 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,744 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,744 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,744 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,745 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,745 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,746 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,746 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,746 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,746 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,747 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,747 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,747 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,748 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,748 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,748 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,748 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,749 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,749 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,753 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,753 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,753 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,754 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,754 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,754 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,761 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,761 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,761 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,761 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,762 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,762 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 03:13:23,776 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 03:13:23,794 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 03:13:23,795 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 03:13:23,795 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 03:13:23,795 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 03:13:23,795 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 03:13:23,795 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 03:13:23,796 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 03:13:23,796 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 03:13:23,808 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 57 transitions, 124 flow [2020-04-18 03:13:23,909 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1741 states. [2020-04-18 03:13:23,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states. [2020-04-18 03:13:23,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-18 03:13:23,923 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:23,924 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:23,925 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:23,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:23,931 INFO L82 PathProgramCache]: Analyzing trace with hash -229509324, now seen corresponding path program 1 times [2020-04-18 03:13:23,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:23,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808990531] [2020-04-18 03:13:23,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:24,433 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 03:13:24,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808990531] [2020-04-18 03:13:24,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:13:24,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-04-18 03:13:24,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516762205] [2020-04-18 03:13:24,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-18 03:13:24,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:24,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-18 03:13:24,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-18 03:13:24,461 INFO L87 Difference]: Start difference. First operand 1741 states. Second operand 6 states. [2020-04-18 03:13:24,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:24,719 INFO L93 Difference]: Finished difference Result 3726 states and 10822 transitions. [2020-04-18 03:13:24,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-18 03:13:24,721 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-04-18 03:13:24,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:24,751 INFO L225 Difference]: With dead ends: 3726 [2020-04-18 03:13:24,752 INFO L226 Difference]: Without dead ends: 1164 [2020-04-18 03:13:24,754 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-04-18 03:13:24,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2020-04-18 03:13:24,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 899. [2020-04-18 03:13:24,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2020-04-18 03:13:24,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2439 transitions. [2020-04-18 03:13:24,883 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2439 transitions. Word has length 22 [2020-04-18 03:13:24,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:24,884 INFO L479 AbstractCegarLoop]: Abstraction has 899 states and 2439 transitions. [2020-04-18 03:13:24,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-18 03:13:24,884 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2439 transitions. [2020-04-18 03:13:24,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-18 03:13:24,888 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:24,889 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:24,889 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:24,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:24,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2049778618, now seen corresponding path program 1 times [2020-04-18 03:13:24,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:24,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41239205] [2020-04-18 03:13:24,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:25,111 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 03:13:25,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41239205] [2020-04-18 03:13:25,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:13:25,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-18 03:13:25,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52395830] [2020-04-18 03:13:25,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-18 03:13:25,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:25,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 03:13:25,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-04-18 03:13:25,115 INFO L87 Difference]: Start difference. First operand 899 states and 2439 transitions. Second operand 7 states. [2020-04-18 03:13:25,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:25,309 INFO L93 Difference]: Finished difference Result 1676 states and 4449 transitions. [2020-04-18 03:13:25,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-18 03:13:25,310 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-04-18 03:13:25,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:25,320 INFO L225 Difference]: With dead ends: 1676 [2020-04-18 03:13:25,320 INFO L226 Difference]: Without dead ends: 1418 [2020-04-18 03:13:25,321 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-04-18 03:13:25,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2020-04-18 03:13:25,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 994. [2020-04-18 03:13:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 994 states. [2020-04-18 03:13:25,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 2707 transitions. [2020-04-18 03:13:25,367 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 2707 transitions. Word has length 27 [2020-04-18 03:13:25,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:25,367 INFO L479 AbstractCegarLoop]: Abstraction has 994 states and 2707 transitions. [2020-04-18 03:13:25,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-18 03:13:25,368 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 2707 transitions. [2020-04-18 03:13:25,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-18 03:13:25,371 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:25,371 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:25,372 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:25,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:25,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1770660956, now seen corresponding path program 1 times [2020-04-18 03:13:25,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:25,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709538634] [2020-04-18 03:13:25,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:25,542 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 03:13:25,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709538634] [2020-04-18 03:13:25,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:13:25,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-18 03:13:25,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604169808] [2020-04-18 03:13:25,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-18 03:13:25,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:25,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 03:13:25,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-04-18 03:13:25,545 INFO L87 Difference]: Start difference. First operand 994 states and 2707 transitions. Second operand 7 states. [2020-04-18 03:13:25,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:25,770 INFO L93 Difference]: Finished difference Result 1682 states and 4428 transitions. [2020-04-18 03:13:25,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-18 03:13:25,771 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-04-18 03:13:25,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:25,780 INFO L225 Difference]: With dead ends: 1682 [2020-04-18 03:13:25,780 INFO L226 Difference]: Without dead ends: 1378 [2020-04-18 03:13:25,781 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-04-18 03:13:25,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2020-04-18 03:13:25,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1097. [2020-04-18 03:13:25,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1097 states. [2020-04-18 03:13:25,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 2930 transitions. [2020-04-18 03:13:25,822 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 2930 transitions. Word has length 27 [2020-04-18 03:13:25,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:25,823 INFO L479 AbstractCegarLoop]: Abstraction has 1097 states and 2930 transitions. [2020-04-18 03:13:25,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-18 03:13:25,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 2930 transitions. [2020-04-18 03:13:25,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-18 03:13:25,825 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:25,825 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:25,826 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:25,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:25,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1708993586, now seen corresponding path program 2 times [2020-04-18 03:13:25,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:25,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128887436] [2020-04-18 03:13:25,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:26,017 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 03:13:26,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128887436] [2020-04-18 03:13:26,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:13:26,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-04-18 03:13:26,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289670758] [2020-04-18 03:13:26,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-18 03:13:26,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:26,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-18 03:13:26,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-04-18 03:13:26,020 INFO L87 Difference]: Start difference. First operand 1097 states and 2930 transitions. Second operand 7 states. [2020-04-18 03:13:26,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:26,277 INFO L93 Difference]: Finished difference Result 2194 states and 5772 transitions. [2020-04-18 03:13:26,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-18 03:13:26,278 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-04-18 03:13:26,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:26,293 INFO L225 Difference]: With dead ends: 2194 [2020-04-18 03:13:26,294 INFO L226 Difference]: Without dead ends: 1766 [2020-04-18 03:13:26,295 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:13:26,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2020-04-18 03:13:26,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 1195. [2020-04-18 03:13:26,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1195 states. [2020-04-18 03:13:26,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 3244 transitions. [2020-04-18 03:13:26,348 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 3244 transitions. Word has length 27 [2020-04-18 03:13:26,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:26,348 INFO L479 AbstractCegarLoop]: Abstraction has 1195 states and 3244 transitions. [2020-04-18 03:13:26,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-18 03:13:26,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 3244 transitions. [2020-04-18 03:13:26,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-04-18 03:13:26,351 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:26,351 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:26,351 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:26,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:26,352 INFO L82 PathProgramCache]: Analyzing trace with hash -357259747, now seen corresponding path program 1 times [2020-04-18 03:13:26,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:26,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886877524] [2020-04-18 03:13:26,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:26,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886877524] [2020-04-18 03:13:26,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027689614] [2020-04-18 03:13:26,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:26,602 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-18 03:13:26,609 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:26,694 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:26,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:26,712 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 03:13:26,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:26,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-04-18 03:13:26,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502485813] [2020-04-18 03:13:26,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-18 03:13:26,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:26,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 03:13:26,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-04-18 03:13:26,715 INFO L87 Difference]: Start difference. First operand 1195 states and 3244 transitions. Second operand 11 states. [2020-04-18 03:13:27,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:27,006 INFO L93 Difference]: Finished difference Result 2470 states and 6514 transitions. [2020-04-18 03:13:27,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-18 03:13:27,009 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-04-18 03:13:27,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:27,027 INFO L225 Difference]: With dead ends: 2470 [2020-04-18 03:13:27,036 INFO L226 Difference]: Without dead ends: 2106 [2020-04-18 03:13:27,037 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2020-04-18 03:13:27,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2020-04-18 03:13:27,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1395. [2020-04-18 03:13:27,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1395 states. [2020-04-18 03:13:27,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 3787 transitions. [2020-04-18 03:13:27,108 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 3787 transitions. Word has length 32 [2020-04-18 03:13:27,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:27,110 INFO L479 AbstractCegarLoop]: Abstraction has 1395 states and 3787 transitions. [2020-04-18 03:13:27,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-18 03:13:27,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 3787 transitions. [2020-04-18 03:13:27,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-04-18 03:13:27,115 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:27,116 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:27,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:27,323 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:27,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:27,324 INFO L82 PathProgramCache]: Analyzing trace with hash 393433554, now seen corresponding path program 1 times [2020-04-18 03:13:27,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:27,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545425013] [2020-04-18 03:13:27,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:27,463 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 03:13:27,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545425013] [2020-04-18 03:13:27,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:13:27,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-04-18 03:13:27,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980044442] [2020-04-18 03:13:27,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-18 03:13:27,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:27,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 03:13:27,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-04-18 03:13:27,465 INFO L87 Difference]: Start difference. First operand 1395 states and 3787 transitions. Second operand 8 states. [2020-04-18 03:13:27,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:27,724 INFO L93 Difference]: Finished difference Result 2253 states and 5886 transitions. [2020-04-18 03:13:27,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-18 03:13:27,725 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-04-18 03:13:27,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:27,739 INFO L225 Difference]: With dead ends: 2253 [2020-04-18 03:13:27,740 INFO L226 Difference]: Without dead ends: 1949 [2020-04-18 03:13:27,740 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:13:27,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1949 states. [2020-04-18 03:13:27,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1949 to 1530. [2020-04-18 03:13:27,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1530 states. [2020-04-18 03:13:27,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 4102 transitions. [2020-04-18 03:13:27,805 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 4102 transitions. Word has length 32 [2020-04-18 03:13:27,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:27,806 INFO L479 AbstractCegarLoop]: Abstraction has 1530 states and 4102 transitions. [2020-04-18 03:13:27,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-18 03:13:27,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 4102 transitions. [2020-04-18 03:13:27,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-04-18 03:13:27,809 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:27,809 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:27,809 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:27,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:27,809 INFO L82 PathProgramCache]: Analyzing trace with hash 455100924, now seen corresponding path program 2 times [2020-04-18 03:13:27,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:27,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210011445] [2020-04-18 03:13:27,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:27,988 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 03:13:27,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210011445] [2020-04-18 03:13:27,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 03:13:27,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-04-18 03:13:27,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881464004] [2020-04-18 03:13:27,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-18 03:13:27,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:27,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 03:13:27,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-04-18 03:13:27,993 INFO L87 Difference]: Start difference. First operand 1530 states and 4102 transitions. Second operand 8 states. [2020-04-18 03:13:28,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:28,306 INFO L93 Difference]: Finished difference Result 2790 states and 7336 transitions. [2020-04-18 03:13:28,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-18 03:13:28,307 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-04-18 03:13:28,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:28,321 INFO L225 Difference]: With dead ends: 2790 [2020-04-18 03:13:28,322 INFO L226 Difference]: Without dead ends: 2362 [2020-04-18 03:13:28,322 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2020-04-18 03:13:28,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2020-04-18 03:13:28,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 1572. [2020-04-18 03:13:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1572 states. [2020-04-18 03:13:28,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 4240 transitions. [2020-04-18 03:13:28,380 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 4240 transitions. Word has length 32 [2020-04-18 03:13:28,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:28,380 INFO L479 AbstractCegarLoop]: Abstraction has 1572 states and 4240 transitions. [2020-04-18 03:13:28,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-18 03:13:28,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 4240 transitions. [2020-04-18 03:13:28,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 03:13:28,384 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:28,384 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:28,384 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:28,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:28,385 INFO L82 PathProgramCache]: Analyzing trace with hash 69801563, now seen corresponding path program 1 times [2020-04-18 03:13:28,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:28,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223278099] [2020-04-18 03:13:28,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:28,541 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 03:13:28,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223278099] [2020-04-18 03:13:28,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673452079] [2020-04-18 03:13:28,542 INFO L94 rtionOrderModulation]: Keeping assertion order 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 03:13:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:28,601 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 03:13:28,603 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:28,712 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:28,718 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 03:13:28,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:28,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-04-18 03:13:28,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990563313] [2020-04-18 03:13:28,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-18 03:13:28,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:28,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 03:13:28,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-04-18 03:13:28,721 INFO L87 Difference]: Start difference. First operand 1572 states and 4240 transitions. Second operand 14 states. [2020-04-18 03:13:29,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:29,144 INFO L93 Difference]: Finished difference Result 2674 states and 6904 transitions. [2020-04-18 03:13:29,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-18 03:13:29,144 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-04-18 03:13:29,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:29,161 INFO L225 Difference]: With dead ends: 2674 [2020-04-18 03:13:29,162 INFO L226 Difference]: Without dead ends: 2282 [2020-04-18 03:13:29,163 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2020-04-18 03:13:29,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2020-04-18 03:13:29,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 1696. [2020-04-18 03:13:29,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1696 states. [2020-04-18 03:13:29,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 4534 transitions. [2020-04-18 03:13:29,228 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 4534 transitions. Word has length 37 [2020-04-18 03:13:29,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:29,229 INFO L479 AbstractCegarLoop]: Abstraction has 1696 states and 4534 transitions. [2020-04-18 03:13:29,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-18 03:13:29,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 4534 transitions. [2020-04-18 03:13:29,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 03:13:29,236 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:29,236 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:29,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:29,441 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:29,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:29,441 INFO L82 PathProgramCache]: Analyzing trace with hash 131468933, now seen corresponding path program 2 times [2020-04-18 03:13:29,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:29,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116522049] [2020-04-18 03:13:29,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:29,668 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 03:13:29,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116522049] [2020-04-18 03:13:29,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281418191] [2020-04-18 03:13:29,669 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 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 03:13:29,730 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:13:29,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:29,732 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 03:13:29,734 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:29,808 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:29,882 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:29,893 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 03:13:29,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:29,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-04-18 03:13:29,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524986636] [2020-04-18 03:13:29,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-18 03:13:29,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:29,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 03:13:29,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-04-18 03:13:29,896 INFO L87 Difference]: Start difference. First operand 1696 states and 4534 transitions. Second operand 14 states. [2020-04-18 03:13:30,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:30,787 INFO L93 Difference]: Finished difference Result 3848 states and 9987 transitions. [2020-04-18 03:13:30,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-18 03:13:30,788 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-04-18 03:13:30,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:30,814 INFO L225 Difference]: With dead ends: 3848 [2020-04-18 03:13:30,815 INFO L226 Difference]: Without dead ends: 3050 [2020-04-18 03:13:30,815 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2020-04-18 03:13:30,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3050 states. [2020-04-18 03:13:30,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3050 to 1870. [2020-04-18 03:13:30,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1870 states. [2020-04-18 03:13:30,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 5014 transitions. [2020-04-18 03:13:30,879 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 5014 transitions. Word has length 37 [2020-04-18 03:13:30,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:30,879 INFO L479 AbstractCegarLoop]: Abstraction has 1870 states and 5014 transitions. [2020-04-18 03:13:30,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-18 03:13:30,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 5014 transitions. [2020-04-18 03:13:30,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 03:13:30,883 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:30,884 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:31,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:31,095 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:31,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:31,096 INFO L82 PathProgramCache]: Analyzing trace with hash -246375699, now seen corresponding path program 1 times [2020-04-18 03:13:31,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:31,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688470725] [2020-04-18 03:13:31,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:31,235 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 03:13:31,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688470725] [2020-04-18 03:13:31,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895221421] [2020-04-18 03:13:31,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:31,294 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 03:13:31,297 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:31,453 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:31,458 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 03:13:31,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:31,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-04-18 03:13:31,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590785300] [2020-04-18 03:13:31,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-18 03:13:31,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:31,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 03:13:31,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-04-18 03:13:31,461 INFO L87 Difference]: Start difference. First operand 1870 states and 5014 transitions. Second operand 14 states. [2020-04-18 03:13:31,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:31,736 INFO L93 Difference]: Finished difference Result 2900 states and 7396 transitions. [2020-04-18 03:13:31,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-18 03:13:31,737 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-04-18 03:13:31,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:31,759 INFO L225 Difference]: With dead ends: 2900 [2020-04-18 03:13:31,759 INFO L226 Difference]: Without dead ends: 2748 [2020-04-18 03:13:31,760 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-04-18 03:13:31,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2020-04-18 03:13:31,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 1895. [2020-04-18 03:13:31,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1895 states. [2020-04-18 03:13:31,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 5069 transitions. [2020-04-18 03:13:31,817 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 5069 transitions. Word has length 37 [2020-04-18 03:13:31,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:31,818 INFO L479 AbstractCegarLoop]: Abstraction has 1895 states and 5069 transitions. [2020-04-18 03:13:31,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-18 03:13:31,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 5069 transitions. [2020-04-18 03:13:31,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 03:13:31,822 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:31,822 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:32,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:32,031 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:32,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:32,031 INFO L82 PathProgramCache]: Analyzing trace with hash 992562071, now seen corresponding path program 2 times [2020-04-18 03:13:32,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:32,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927532989] [2020-04-18 03:13:32,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:32,172 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 03:13:32,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927532989] [2020-04-18 03:13:32,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601950898] [2020-04-18 03:13:32,173 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 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 03:13:32,228 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:13:32,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:32,229 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 03:13:32,231 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:32,328 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:32,334 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 03:13:32,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:32,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-04-18 03:13:32,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936431217] [2020-04-18 03:13:32,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-18 03:13:32,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:32,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 03:13:32,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-04-18 03:13:32,337 INFO L87 Difference]: Start difference. First operand 1895 states and 5069 transitions. Second operand 14 states. [2020-04-18 03:13:32,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:32,676 INFO L93 Difference]: Finished difference Result 3089 states and 7796 transitions. [2020-04-18 03:13:32,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-18 03:13:32,677 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-04-18 03:13:32,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:32,685 INFO L225 Difference]: With dead ends: 3089 [2020-04-18 03:13:32,686 INFO L226 Difference]: Without dead ends: 2937 [2020-04-18 03:13:32,686 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-04-18 03:13:32,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2937 states. [2020-04-18 03:13:32,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2937 to 1870. [2020-04-18 03:13:32,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1870 states. [2020-04-18 03:13:32,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 5014 transitions. [2020-04-18 03:13:32,741 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 5014 transitions. Word has length 37 [2020-04-18 03:13:32,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:32,741 INFO L479 AbstractCegarLoop]: Abstraction has 1870 states and 5014 transitions. [2020-04-18 03:13:32,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-18 03:13:32,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 5014 transitions. [2020-04-18 03:13:32,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 03:13:32,744 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:32,745 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:32,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:32,958 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:32,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:32,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1302902873, now seen corresponding path program 3 times [2020-04-18 03:13:32,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:32,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695027101] [2020-04-18 03:13:32,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:33,077 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 03:13:33,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695027101] [2020-04-18 03:13:33,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134215963] [2020-04-18 03:13:33,079 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:33,129 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 03:13:33,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:33,131 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 03:13:33,133 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:33,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:33,247 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 03:13:33,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:33,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-04-18 03:13:33,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642234724] [2020-04-18 03:13:33,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-18 03:13:33,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:33,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 03:13:33,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-04-18 03:13:33,251 INFO L87 Difference]: Start difference. First operand 1870 states and 5014 transitions. Second operand 14 states. [2020-04-18 03:13:33,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:33,671 INFO L93 Difference]: Finished difference Result 3164 states and 8131 transitions. [2020-04-18 03:13:33,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-18 03:13:33,672 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-04-18 03:13:33,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:33,683 INFO L225 Difference]: With dead ends: 3164 [2020-04-18 03:13:33,683 INFO L226 Difference]: Without dead ends: 3012 [2020-04-18 03:13:33,684 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2020-04-18 03:13:33,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2020-04-18 03:13:33,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 1950. [2020-04-18 03:13:33,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1950 states. [2020-04-18 03:13:33,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 5264 transitions. [2020-04-18 03:13:33,765 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 5264 transitions. Word has length 37 [2020-04-18 03:13:33,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:33,765 INFO L479 AbstractCegarLoop]: Abstraction has 1950 states and 5264 transitions. [2020-04-18 03:13:33,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-18 03:13:33,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 5264 transitions. [2020-04-18 03:13:33,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-04-18 03:13:33,769 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:33,769 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:33,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:33,973 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:33,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:33,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1111627043, now seen corresponding path program 4 times [2020-04-18 03:13:33,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:33,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574344988] [2020-04-18 03:13:33,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:34,159 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 03:13:34,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574344988] [2020-04-18 03:13:34,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870559544] [2020-04-18 03:13:34,160 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:34,208 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:13:34,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:34,209 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 03:13:34,211 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:34,286 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:34,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:34,311 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 03:13:34,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:34,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-04-18 03:13:34,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736994890] [2020-04-18 03:13:34,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-18 03:13:34,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:34,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-18 03:13:34,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-04-18 03:13:34,313 INFO L87 Difference]: Start difference. First operand 1950 states and 5264 transitions. Second operand 14 states. [2020-04-18 03:13:35,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:35,254 INFO L93 Difference]: Finished difference Result 4568 states and 11807 transitions. [2020-04-18 03:13:35,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-18 03:13:35,255 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-04-18 03:13:35,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:35,264 INFO L225 Difference]: With dead ends: 4568 [2020-04-18 03:13:35,264 INFO L226 Difference]: Without dead ends: 3770 [2020-04-18 03:13:35,265 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=372, Invalid=1520, Unknown=0, NotChecked=0, Total=1892 [2020-04-18 03:13:35,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3770 states. [2020-04-18 03:13:35,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3770 to 2065. [2020-04-18 03:13:35,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-04-18 03:13:35,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5545 transitions. [2020-04-18 03:13:35,327 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5545 transitions. Word has length 37 [2020-04-18 03:13:35,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:35,328 INFO L479 AbstractCegarLoop]: Abstraction has 2065 states and 5545 transitions. [2020-04-18 03:13:35,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-18 03:13:35,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5545 transitions. [2020-04-18 03:13:35,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 03:13:35,334 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:35,334 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:35,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:35,542 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:35,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:35,542 INFO L82 PathProgramCache]: Analyzing trace with hash -210299971, now seen corresponding path program 2 times [2020-04-18 03:13:35,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:35,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206788150] [2020-04-18 03:13:35,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:35,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206788150] [2020-04-18 03:13:35,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258974623] [2020-04-18 03:13:35,694 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 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 03:13:35,742 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:13:35,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:35,744 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 03:13:35,746 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:35,855 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:35,869 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:35,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:35,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-04-18 03:13:35,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348646863] [2020-04-18 03:13:35,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-18 03:13:35,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:35,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 03:13:35,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-04-18 03:13:35,878 INFO L87 Difference]: Start difference. First operand 2065 states and 5545 transitions. Second operand 15 states. [2020-04-18 03:13:36,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:36,277 INFO L93 Difference]: Finished difference Result 3548 states and 9325 transitions. [2020-04-18 03:13:36,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-18 03:13:36,280 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-04-18 03:13:36,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:36,290 INFO L225 Difference]: With dead ends: 3548 [2020-04-18 03:13:36,290 INFO L226 Difference]: Without dead ends: 3184 [2020-04-18 03:13:36,291 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2020-04-18 03:13:36,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2020-04-18 03:13:36,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 2275. [2020-04-18 03:13:36,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2275 states. [2020-04-18 03:13:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 6155 transitions. [2020-04-18 03:13:36,369 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 6155 transitions. Word has length 42 [2020-04-18 03:13:36,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:36,369 INFO L479 AbstractCegarLoop]: Abstraction has 2275 states and 6155 transitions. [2020-04-18 03:13:36,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-18 03:13:36,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 6155 transitions. [2020-04-18 03:13:36,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 03:13:36,374 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:36,375 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:36,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:36,582 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:36,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:36,582 INFO L82 PathProgramCache]: Analyzing trace with hash 540393330, now seen corresponding path program 3 times [2020-04-18 03:13:36,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:36,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131714422] [2020-04-18 03:13:36,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:36,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131714422] [2020-04-18 03:13:36,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284707789] [2020-04-18 03:13:36,714 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:36,773 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 03:13:36,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:36,775 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 03:13:36,776 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:36,897 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:36,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:36,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-04-18 03:13:36,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133487363] [2020-04-18 03:13:36,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 03:13:36,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:36,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 03:13:36,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:13:36,905 INFO L87 Difference]: Start difference. First operand 2275 states and 6155 transitions. Second operand 16 states. [2020-04-18 03:13:37,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:37,430 INFO L93 Difference]: Finished difference Result 3593 states and 9252 transitions. [2020-04-18 03:13:37,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-18 03:13:37,431 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-04-18 03:13:37,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:37,437 INFO L225 Difference]: With dead ends: 3593 [2020-04-18 03:13:37,437 INFO L226 Difference]: Without dead ends: 3441 [2020-04-18 03:13:37,438 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2020-04-18 03:13:37,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2020-04-18 03:13:37,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 2348. [2020-04-18 03:13:37,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2348 states. [2020-04-18 03:13:37,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2348 states to 2348 states and 6320 transitions. [2020-04-18 03:13:37,491 INFO L78 Accepts]: Start accepts. Automaton has 2348 states and 6320 transitions. Word has length 42 [2020-04-18 03:13:37,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:37,491 INFO L479 AbstractCegarLoop]: Abstraction has 2348 states and 6320 transitions. [2020-04-18 03:13:37,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 03:13:37,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2348 states and 6320 transitions. [2020-04-18 03:13:37,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 03:13:37,496 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:37,496 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:37,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:37,704 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:37,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:37,705 INFO L82 PathProgramCache]: Analyzing trace with hash 602060700, now seen corresponding path program 4 times [2020-04-18 03:13:37,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:37,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940575926] [2020-04-18 03:13:37,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:37,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:37,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940575926] [2020-04-18 03:13:37,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895760423] [2020-04-18 03:13:37,910 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:37,955 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:13:37,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:37,956 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 03:13:37,958 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:38,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:38,090 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:38,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:38,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-04-18 03:13:38,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320204010] [2020-04-18 03:13:38,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 03:13:38,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:38,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 03:13:38,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:13:38,102 INFO L87 Difference]: Start difference. First operand 2348 states and 6320 transitions. Second operand 16 states. [2020-04-18 03:13:39,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:39,074 INFO L93 Difference]: Finished difference Result 4790 states and 12362 transitions. [2020-04-18 03:13:39,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-18 03:13:39,074 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-04-18 03:13:39,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:39,083 INFO L225 Difference]: With dead ends: 4790 [2020-04-18 03:13:39,083 INFO L226 Difference]: Without dead ends: 4250 [2020-04-18 03:13:39,084 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=360, Invalid=1532, Unknown=0, NotChecked=0, Total=1892 [2020-04-18 03:13:39,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4250 states. [2020-04-18 03:13:39,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4250 to 2300. [2020-04-18 03:13:39,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2300 states. [2020-04-18 03:13:39,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 6210 transitions. [2020-04-18 03:13:39,146 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 6210 transitions. Word has length 42 [2020-04-18 03:13:39,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:39,146 INFO L479 AbstractCegarLoop]: Abstraction has 2300 states and 6210 transitions. [2020-04-18 03:13:39,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 03:13:39,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 6210 transitions. [2020-04-18 03:13:39,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 03:13:39,151 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:39,151 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:39,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:39,355 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:39,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:39,355 INFO L82 PathProgramCache]: Analyzing trace with hash 224216068, now seen corresponding path program 1 times [2020-04-18 03:13:39,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:39,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217651909] [2020-04-18 03:13:39,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:39,495 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 03:13:39,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217651909] [2020-04-18 03:13:39,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384693467] [2020-04-18 03:13:39,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:39,560 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 03:13:39,565 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:39,831 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:39,847 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 03:13:39,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:39,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-04-18 03:13:39,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700449791] [2020-04-18 03:13:39,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 03:13:39,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:39,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 03:13:39,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:13:39,849 INFO L87 Difference]: Start difference. First operand 2300 states and 6210 transitions. Second operand 16 states. [2020-04-18 03:13:40,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:40,297 INFO L93 Difference]: Finished difference Result 3605 states and 9158 transitions. [2020-04-18 03:13:40,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-18 03:13:40,298 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-04-18 03:13:40,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:40,302 INFO L225 Difference]: With dead ends: 3605 [2020-04-18 03:13:40,302 INFO L226 Difference]: Without dead ends: 3453 [2020-04-18 03:13:40,303 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-04-18 03:13:40,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3453 states. [2020-04-18 03:13:40,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3453 to 2423. [2020-04-18 03:13:40,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2423 states. [2020-04-18 03:13:40,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 6485 transitions. [2020-04-18 03:13:40,350 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 6485 transitions. Word has length 42 [2020-04-18 03:13:40,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:40,350 INFO L479 AbstractCegarLoop]: Abstraction has 2423 states and 6485 transitions. [2020-04-18 03:13:40,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 03:13:40,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 6485 transitions. [2020-04-18 03:13:40,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 03:13:40,355 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:40,355 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:40,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:40,560 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:40,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:40,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1463153838, now seen corresponding path program 2 times [2020-04-18 03:13:40,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:40,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142216366] [2020-04-18 03:13:40,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:40,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:40,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142216366] [2020-04-18 03:13:40,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641378549] [2020-04-18 03:13:40,713 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 03:13:40,766 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:13:40,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:40,767 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 03:13:40,768 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:40,873 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:40,879 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 03:13:40,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:40,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-04-18 03:13:40,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502937895] [2020-04-18 03:13:40,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 03:13:40,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:40,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 03:13:40,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:13:40,881 INFO L87 Difference]: Start difference. First operand 2423 states and 6485 transitions. Second operand 16 states. [2020-04-18 03:13:41,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:41,345 INFO L93 Difference]: Finished difference Result 4009 states and 10095 transitions. [2020-04-18 03:13:41,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-18 03:13:41,346 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-04-18 03:13:41,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:41,351 INFO L225 Difference]: With dead ends: 4009 [2020-04-18 03:13:41,351 INFO L226 Difference]: Without dead ends: 3857 [2020-04-18 03:13:41,352 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2020-04-18 03:13:41,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3857 states. [2020-04-18 03:13:41,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3857 to 2402. [2020-04-18 03:13:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2402 states. [2020-04-18 03:13:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 6495 transitions. [2020-04-18 03:13:41,411 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 6495 transitions. Word has length 42 [2020-04-18 03:13:41,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:41,412 INFO L479 AbstractCegarLoop]: Abstraction has 2402 states and 6495 transitions. [2020-04-18 03:13:41,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 03:13:41,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 6495 transitions. [2020-04-18 03:13:41,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 03:13:41,416 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:41,417 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:41,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:41,630 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:41,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:41,630 INFO L82 PathProgramCache]: Analyzing trace with hash -832311106, now seen corresponding path program 3 times [2020-04-18 03:13:41,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:41,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566299723] [2020-04-18 03:13:41,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:41,811 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 03:13:41,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566299723] [2020-04-18 03:13:41,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630965385] [2020-04-18 03:13:41,815 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 03:13:41,881 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 03:13:41,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:41,882 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 03:13:41,883 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:42,001 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:42,006 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 03:13:42,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:42,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-04-18 03:13:42,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116569913] [2020-04-18 03:13:42,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 03:13:42,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:42,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 03:13:42,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:13:42,009 INFO L87 Difference]: Start difference. First operand 2402 states and 6495 transitions. Second operand 16 states. [2020-04-18 03:13:42,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:42,617 INFO L93 Difference]: Finished difference Result 4055 states and 10460 transitions. [2020-04-18 03:13:42,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-18 03:13:42,617 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-04-18 03:13:42,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:42,622 INFO L225 Difference]: With dead ends: 4055 [2020-04-18 03:13:42,622 INFO L226 Difference]: Without dead ends: 3903 [2020-04-18 03:13:42,623 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2020-04-18 03:13:42,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3903 states. [2020-04-18 03:13:42,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3903 to 2524. [2020-04-18 03:13:42,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2524 states. [2020-04-18 03:13:42,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 6857 transitions. [2020-04-18 03:13:42,675 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 6857 transitions. Word has length 42 [2020-04-18 03:13:42,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:42,675 INFO L479 AbstractCegarLoop]: Abstraction has 2524 states and 6857 transitions. [2020-04-18 03:13:42,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 03:13:42,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 6857 transitions. [2020-04-18 03:13:42,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 03:13:42,679 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:42,680 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:42,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:42,884 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:42,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:42,884 INFO L82 PathProgramCache]: Analyzing trace with hash -641035276, now seen corresponding path program 4 times [2020-04-18 03:13:42,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:42,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148591614] [2020-04-18 03:13:42,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:43,042 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 03:13:43,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148591614] [2020-04-18 03:13:43,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755259329] [2020-04-18 03:13:43,043 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 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 03:13:43,097 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:13:43,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:43,098 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-18 03:13:43,099 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:43,177 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:43,197 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:43,201 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 03:13:43,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:43,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-04-18 03:13:43,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977348869] [2020-04-18 03:13:43,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-18 03:13:43,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:43,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-18 03:13:43,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-04-18 03:13:43,202 INFO L87 Difference]: Start difference. First operand 2524 states and 6857 transitions. Second operand 16 states. [2020-04-18 03:13:44,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:44,163 INFO L93 Difference]: Finished difference Result 5590 states and 14497 transitions. [2020-04-18 03:13:44,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-04-18 03:13:44,163 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-04-18 03:13:44,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:44,170 INFO L225 Difference]: With dead ends: 5590 [2020-04-18 03:13:44,170 INFO L226 Difference]: Without dead ends: 4792 [2020-04-18 03:13:44,171 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=478, Invalid=2072, Unknown=0, NotChecked=0, Total=2550 [2020-04-18 03:13:44,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4792 states. [2020-04-18 03:13:44,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4792 to 2626. [2020-04-18 03:13:44,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2626 states. [2020-04-18 03:13:44,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 7117 transitions. [2020-04-18 03:13:44,229 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 7117 transitions. Word has length 42 [2020-04-18 03:13:44,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:44,230 INFO L479 AbstractCegarLoop]: Abstraction has 2626 states and 7117 transitions. [2020-04-18 03:13:44,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-18 03:13:44,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 7117 transitions. [2020-04-18 03:13:44,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:44,235 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:44,235 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:44,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:44,439 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:44,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:44,439 INFO L82 PathProgramCache]: Analyzing trace with hash 904539323, now seen corresponding path program 5 times [2020-04-18 03:13:44,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:44,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244763941] [2020-04-18 03:13:44,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:44,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244763941] [2020-04-18 03:13:44,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498123058] [2020-04-18 03:13:44,641 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 03:13:44,697 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-18 03:13:44,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:44,698 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:44,699 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:44,842 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:44,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:44,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:13:44,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279030411] [2020-04-18 03:13:44,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:13:44,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:44,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:13:44,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:13:44,848 INFO L87 Difference]: Start difference. First operand 2626 states and 7117 transitions. Second operand 17 states. [2020-04-18 03:13:45,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:45,363 INFO L93 Difference]: Finished difference Result 3842 states and 9942 transitions. [2020-04-18 03:13:45,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-18 03:13:45,363 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:13:45,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:45,369 INFO L225 Difference]: With dead ends: 3842 [2020-04-18 03:13:45,369 INFO L226 Difference]: Without dead ends: 3690 [2020-04-18 03:13:45,369 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2020-04-18 03:13:45,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3690 states. [2020-04-18 03:13:45,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3690 to 2699. [2020-04-18 03:13:45,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2699 states. [2020-04-18 03:13:45,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7282 transitions. [2020-04-18 03:13:45,405 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7282 transitions. Word has length 47 [2020-04-18 03:13:45,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:45,405 INFO L479 AbstractCegarLoop]: Abstraction has 2699 states and 7282 transitions. [2020-04-18 03:13:45,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:13:45,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7282 transitions. [2020-04-18 03:13:45,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:45,410 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:45,410 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:45,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:45,613 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:45,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:45,614 INFO L82 PathProgramCache]: Analyzing trace with hash 966206693, now seen corresponding path program 6 times [2020-04-18 03:13:45,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:45,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109483739] [2020-04-18 03:13:45,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:45,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109483739] [2020-04-18 03:13:45,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92130213] [2020-04-18 03:13:45,772 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 03:13:45,820 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-18 03:13:45,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:45,821 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:45,822 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:45,918 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:45,959 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:45,966 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:45,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:45,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:13:45,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002629682] [2020-04-18 03:13:45,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:13:45,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:45,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:13:45,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-04-18 03:13:45,968 INFO L87 Difference]: Start difference. First operand 2699 states and 7282 transitions. Second operand 18 states. [2020-04-18 03:13:47,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:47,059 INFO L93 Difference]: Finished difference Result 5308 states and 13691 transitions. [2020-04-18 03:13:47,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-18 03:13:47,060 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:13:47,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:47,066 INFO L225 Difference]: With dead ends: 5308 [2020-04-18 03:13:47,066 INFO L226 Difference]: Without dead ends: 4768 [2020-04-18 03:13:47,067 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=416, Invalid=1840, Unknown=0, NotChecked=0, Total=2256 [2020-04-18 03:13:47,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4768 states. [2020-04-18 03:13:47,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4768 to 2611. [2020-04-18 03:13:47,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2611 states. [2020-04-18 03:13:47,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 7024 transitions. [2020-04-18 03:13:47,104 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 7024 transitions. Word has length 47 [2020-04-18 03:13:47,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:47,105 INFO L479 AbstractCegarLoop]: Abstraction has 2611 states and 7024 transitions. [2020-04-18 03:13:47,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:13:47,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 7024 transitions. [2020-04-18 03:13:47,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:47,109 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:47,109 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:47,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:47,312 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:47,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:47,313 INFO L82 PathProgramCache]: Analyzing trace with hash 588362061, now seen corresponding path program 5 times [2020-04-18 03:13:47,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:47,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915512094] [2020-04-18 03:13:47,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:47,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915512094] [2020-04-18 03:13:47,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370648162] [2020-04-18 03:13:47,462 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 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 03:13:47,508 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 03:13:47,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:47,510 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:47,511 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:47,706 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:47,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:47,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:13:47,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501245011] [2020-04-18 03:13:47,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:13:47,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:47,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:13:47,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:13:47,716 INFO L87 Difference]: Start difference. First operand 2611 states and 7024 transitions. Second operand 17 states. [2020-04-18 03:13:48,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:13:48,189 INFO L93 Difference]: Finished difference Result 4118 states and 10376 transitions. [2020-04-18 03:13:48,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-18 03:13:48,190 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:13:48,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:13:48,195 INFO L225 Difference]: With dead ends: 4118 [2020-04-18 03:13:48,195 INFO L226 Difference]: Without dead ends: 3966 [2020-04-18 03:13:48,195 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2020-04-18 03:13:48,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3966 states. [2020-04-18 03:13:48,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3966 to 2725. [2020-04-18 03:13:48,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2725 states. [2020-04-18 03:13:48,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 7284 transitions. [2020-04-18 03:13:48,235 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 7284 transitions. Word has length 47 [2020-04-18 03:13:48,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:13:48,236 INFO L479 AbstractCegarLoop]: Abstraction has 2725 states and 7284 transitions. [2020-04-18 03:13:48,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:13:48,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 7284 transitions. [2020-04-18 03:13:48,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:13:48,240 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:13:48,240 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:13:48,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:13:48,443 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:13:48,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:13:48,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1827299831, now seen corresponding path program 6 times [2020-04-18 03:13:48,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:13:48,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200406028] [2020-04-18 03:13:48,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:13:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:13:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:48,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200406028] [2020-04-18 03:13:48,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362544126] [2020-04-18 03:13:48,598 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 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 03:13:48,638 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 03:13:48,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:13:48,639 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:13:48,640 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:13:56,904 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:13:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:13:56,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:13:56,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:13:56,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916539130] [2020-04-18 03:13:56,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:13:56,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:13:56,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:13:56,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=247, Unknown=4, NotChecked=0, Total=306 [2020-04-18 03:13:56,917 INFO L87 Difference]: Start difference. First operand 2725 states and 7284 transitions. Second operand 18 states. [2020-04-18 03:13:59,322 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-04-18 03:14:01,466 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 24 [2020-04-18 03:14:05,561 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-04-18 03:14:10,272 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 25 [2020-04-18 03:14:20,974 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 22 [2020-04-18 03:14:25,010 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 22 [2020-04-18 03:14:25,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:25,075 INFO L93 Difference]: Finished difference Result 4536 states and 11425 transitions. [2020-04-18 03:14:25,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-18 03:14:25,076 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:14:25,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:25,081 INFO L225 Difference]: With dead ends: 4536 [2020-04-18 03:14:25,081 INFO L226 Difference]: Without dead ends: 4384 [2020-04-18 03:14:25,082 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=254, Invalid=1002, Unknown=4, NotChecked=0, Total=1260 [2020-04-18 03:14:25,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4384 states. [2020-04-18 03:14:25,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4384 to 2688. [2020-04-18 03:14:25,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2688 states. [2020-04-18 03:14:25,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 7257 transitions. [2020-04-18 03:14:25,124 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 7257 transitions. Word has length 47 [2020-04-18 03:14:25,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:25,124 INFO L479 AbstractCegarLoop]: Abstraction has 2688 states and 7257 transitions. [2020-04-18 03:14:25,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:14:25,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 7257 transitions. [2020-04-18 03:14:25,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:14:25,128 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:25,128 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:14:25,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:25,329 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:25,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:25,330 INFO L82 PathProgramCache]: Analyzing trace with hash -468165113, now seen corresponding path program 7 times [2020-04-18 03:14:25,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:25,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108631475] [2020-04-18 03:14:25,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:25,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108631475] [2020-04-18 03:14:25,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064108151] [2020-04-18 03:14:25,485 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 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 03:14:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:25,540 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:14:25,541 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:25,772 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:25,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:25,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:14:25,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224725247] [2020-04-18 03:14:25,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:14:25,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:25,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:14:25,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:14:25,779 INFO L87 Difference]: Start difference. First operand 2688 states and 7257 transitions. Second operand 17 states. [2020-04-18 03:14:26,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:26,670 INFO L93 Difference]: Finished difference Result 4595 states and 11890 transitions. [2020-04-18 03:14:26,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-18 03:14:26,671 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:14:26,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:26,677 INFO L225 Difference]: With dead ends: 4595 [2020-04-18 03:14:26,678 INFO L226 Difference]: Without dead ends: 4443 [2020-04-18 03:14:26,679 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=304, Invalid=1178, Unknown=0, NotChecked=0, Total=1482 [2020-04-18 03:14:26,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4443 states. [2020-04-18 03:14:26,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4443 to 2810. [2020-04-18 03:14:26,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2810 states. [2020-04-18 03:14:26,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 7619 transitions. [2020-04-18 03:14:26,735 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 7619 transitions. Word has length 47 [2020-04-18 03:14:26,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:26,735 INFO L479 AbstractCegarLoop]: Abstraction has 2810 states and 7619 transitions. [2020-04-18 03:14:26,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:14:26,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 7619 transitions. [2020-04-18 03:14:26,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:14:26,739 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:26,740 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:14:26,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:26,951 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:26,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:26,951 INFO L82 PathProgramCache]: Analyzing trace with hash -276889283, now seen corresponding path program 8 times [2020-04-18 03:14:26,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:26,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661177777] [2020-04-18 03:14:26,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:27,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661177777] [2020-04-18 03:14:27,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871776795] [2020-04-18 03:14:27,133 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:27,202 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:14:27,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:14:27,203 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:14:27,204 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:27,375 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:27,404 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:27,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:27,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:27,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:14:27,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606482648] [2020-04-18 03:14:27,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:14:27,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:27,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:14:27,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:14:27,410 INFO L87 Difference]: Start difference. First operand 2810 states and 7619 transitions. Second operand 17 states. [2020-04-18 03:14:28,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:28,539 INFO L93 Difference]: Finished difference Result 5331 states and 14078 transitions. [2020-04-18 03:14:28,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-18 03:14:28,540 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:14:28,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:28,547 INFO L225 Difference]: With dead ends: 5331 [2020-04-18 03:14:28,547 INFO L226 Difference]: Without dead ends: 4967 [2020-04-18 03:14:28,548 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=395, Invalid=1585, Unknown=0, NotChecked=0, Total=1980 [2020-04-18 03:14:28,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4967 states. [2020-04-18 03:14:28,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4967 to 2743. [2020-04-18 03:14:28,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2743 states. [2020-04-18 03:14:28,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2743 states to 2743 states and 7495 transitions. [2020-04-18 03:14:28,604 INFO L78 Accepts]: Start accepts. Automaton has 2743 states and 7495 transitions. Word has length 47 [2020-04-18 03:14:28,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:28,605 INFO L479 AbstractCegarLoop]: Abstraction has 2743 states and 7495 transitions. [2020-04-18 03:14:28,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:14:28,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2743 states and 7495 transitions. [2020-04-18 03:14:28,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:14:28,609 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:28,609 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:14:28,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:28,821 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:28,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:28,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1355517405, now seen corresponding path program 9 times [2020-04-18 03:14:28,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:28,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111223276] [2020-04-18 03:14:28,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:28,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:28,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111223276] [2020-04-18 03:14:28,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319296896] [2020-04-18 03:14:28,986 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 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 03:14:29,031 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 03:14:29,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:14:29,032 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:14:29,033 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:29,167 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:29,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:29,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:14:29,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996585915] [2020-04-18 03:14:29,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:14:29,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:29,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:14:29,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:14:29,173 INFO L87 Difference]: Start difference. First operand 2743 states and 7495 transitions. Second operand 17 states. [2020-04-18 03:14:29,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:29,736 INFO L93 Difference]: Finished difference Result 4334 states and 11013 transitions. [2020-04-18 03:14:29,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-18 03:14:29,737 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:14:29,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:29,742 INFO L225 Difference]: With dead ends: 4334 [2020-04-18 03:14:29,742 INFO L226 Difference]: Without dead ends: 4182 [2020-04-18 03:14:29,742 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2020-04-18 03:14:29,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4182 states. [2020-04-18 03:14:29,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4182 to 2868. [2020-04-18 03:14:29,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2868 states. [2020-04-18 03:14:29,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2868 states to 2868 states and 7770 transitions. [2020-04-18 03:14:29,787 INFO L78 Accepts]: Start accepts. Automaton has 2868 states and 7770 transitions. Word has length 47 [2020-04-18 03:14:29,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:29,787 INFO L479 AbstractCegarLoop]: Abstraction has 2868 states and 7770 transitions. [2020-04-18 03:14:29,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:14:29,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2868 states and 7770 transitions. [2020-04-18 03:14:29,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:14:29,791 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:29,792 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:14:29,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:29,993 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:29,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:29,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1170160443, now seen corresponding path program 10 times [2020-04-18 03:14:29,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:29,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990367427] [2020-04-18 03:14:29,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:30,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990367427] [2020-04-18 03:14:30,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079100701] [2020-04-18 03:14:30,156 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 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 03:14:30,198 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:14:30,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:14:30,199 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:14:30,200 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:30,735 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:30,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:30,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:14:30,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80301589] [2020-04-18 03:14:30,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:14:30,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:30,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:14:30,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:14:30,741 INFO L87 Difference]: Start difference. First operand 2868 states and 7770 transitions. Second operand 17 states. [2020-04-18 03:14:31,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:31,364 INFO L93 Difference]: Finished difference Result 4390 states and 11133 transitions. [2020-04-18 03:14:31,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-18 03:14:31,365 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:14:31,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:31,370 INFO L225 Difference]: With dead ends: 4390 [2020-04-18 03:14:31,370 INFO L226 Difference]: Without dead ends: 4238 [2020-04-18 03:14:31,371 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=225, Invalid=897, Unknown=0, NotChecked=0, Total=1122 [2020-04-18 03:14:31,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4238 states. [2020-04-18 03:14:31,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4238 to 2981. [2020-04-18 03:14:31,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2981 states. [2020-04-18 03:14:31,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 8020 transitions. [2020-04-18 03:14:31,424 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 8020 transitions. Word has length 47 [2020-04-18 03:14:31,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:31,424 INFO L479 AbstractCegarLoop]: Abstraction has 2981 states and 8020 transitions. [2020-04-18 03:14:31,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:14:31,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 8020 transitions. [2020-04-18 03:14:31,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:14:31,429 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:31,429 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:14:31,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:31,640 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:31,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:31,641 INFO L82 PathProgramCache]: Analyzing trace with hash -453462157, now seen corresponding path program 11 times [2020-04-18 03:14:31,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:31,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073094572] [2020-04-18 03:14:31,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:31,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:31,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073094572] [2020-04-18 03:14:31,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844382783] [2020-04-18 03:14:31,804 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 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 03:14:31,856 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 03:14:31,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:14:31,857 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:14:31,859 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:32,063 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:32,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:32,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:14:32,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471810600] [2020-04-18 03:14:32,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:14:32,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:32,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:14:32,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:14:32,074 INFO L87 Difference]: Start difference. First operand 2981 states and 8020 transitions. Second operand 17 states. [2020-04-18 03:14:32,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:32,803 INFO L93 Difference]: Finished difference Result 4824 states and 12114 transitions. [2020-04-18 03:14:32,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-18 03:14:32,804 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:14:32,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:32,809 INFO L225 Difference]: With dead ends: 4824 [2020-04-18 03:14:32,809 INFO L226 Difference]: Without dead ends: 4672 [2020-04-18 03:14:32,810 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 03:14:32,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4672 states. [2020-04-18 03:14:32,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4672 to 2986. [2020-04-18 03:14:32,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2986 states. [2020-04-18 03:14:32,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 8061 transitions. [2020-04-18 03:14:32,860 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 8061 transitions. Word has length 47 [2020-04-18 03:14:32,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:32,860 INFO L479 AbstractCegarLoop]: Abstraction has 2986 states and 8061 transitions. [2020-04-18 03:14:32,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:14:32,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 8061 transitions. [2020-04-18 03:14:32,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:14:32,864 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:32,864 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:14:33,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:33,065 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:33,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:33,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1315827291, now seen corresponding path program 12 times [2020-04-18 03:14:33,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:33,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629489197] [2020-04-18 03:14:33,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:33,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629489197] [2020-04-18 03:14:33,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304293182] [2020-04-18 03:14:33,216 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 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 03:14:33,257 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 03:14:33,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:14:33,258 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:14:33,259 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:33,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:33,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:33,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:14:33,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868553409] [2020-04-18 03:14:33,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:14:33,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:33,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:14:33,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:14:33,801 INFO L87 Difference]: Start difference. First operand 2986 states and 8061 transitions. Second operand 17 states. [2020-04-18 03:14:34,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:34,560 INFO L93 Difference]: Finished difference Result 4715 states and 11874 transitions. [2020-04-18 03:14:34,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-18 03:14:34,560 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:14:34,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:34,566 INFO L225 Difference]: With dead ends: 4715 [2020-04-18 03:14:34,566 INFO L226 Difference]: Without dead ends: 4563 [2020-04-18 03:14:34,567 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2020-04-18 03:14:34,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4563 states. [2020-04-18 03:14:34,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4563 to 2916. [2020-04-18 03:14:34,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2916 states. [2020-04-18 03:14:34,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 7921 transitions. [2020-04-18 03:14:34,607 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 7921 transitions. Word has length 47 [2020-04-18 03:14:34,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:34,608 INFO L479 AbstractCegarLoop]: Abstraction has 2916 states and 7921 transitions. [2020-04-18 03:14:34,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:14:34,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 7921 transitions. [2020-04-18 03:14:34,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:14:34,611 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:34,611 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:14:34,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:34,813 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:34,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:34,814 INFO L82 PathProgramCache]: Analyzing trace with hash -45706517, now seen corresponding path program 13 times [2020-04-18 03:14:34,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:34,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498695359] [2020-04-18 03:14:34,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:34,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:34,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498695359] [2020-04-18 03:14:34,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106703996] [2020-04-18 03:14:34,963 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 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 03:14:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:35,008 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:14:35,009 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:35,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:35,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:35,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:14:35,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298426457] [2020-04-18 03:14:35,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:14:35,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:35,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:14:35,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:14:35,145 INFO L87 Difference]: Start difference. First operand 2916 states and 7921 transitions. Second operand 17 states. [2020-04-18 03:14:35,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:35,963 INFO L93 Difference]: Finished difference Result 4915 states and 12518 transitions. [2020-04-18 03:14:35,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-18 03:14:35,963 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:14:35,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:35,970 INFO L225 Difference]: With dead ends: 4915 [2020-04-18 03:14:35,971 INFO L226 Difference]: Without dead ends: 4763 [2020-04-18 03:14:35,971 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=316, Invalid=1244, Unknown=0, NotChecked=0, Total=1560 [2020-04-18 03:14:35,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4763 states. [2020-04-18 03:14:36,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4763 to 2977. [2020-04-18 03:14:36,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2977 states. [2020-04-18 03:14:36,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 8147 transitions. [2020-04-18 03:14:36,033 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 8147 transitions. Word has length 47 [2020-04-18 03:14:36,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:36,033 INFO L479 AbstractCegarLoop]: Abstraction has 2977 states and 8147 transitions. [2020-04-18 03:14:36,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:14:36,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 8147 transitions. [2020-04-18 03:14:36,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:14:36,038 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:36,038 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:14:36,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:36,243 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:36,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:36,243 INFO L82 PathProgramCache]: Analyzing trace with hash -528903065, now seen corresponding path program 14 times [2020-04-18 03:14:36,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:36,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833702579] [2020-04-18 03:14:36,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:36,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833702579] [2020-04-18 03:14:36,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278566193] [2020-04-18 03:14:36,372 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 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 03:14:36,416 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:14:36,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:14:36,417 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:14:36,418 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:36,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:36,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:36,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:14:36,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434290559] [2020-04-18 03:14:36,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:14:36,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:36,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:14:36,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:14:36,570 INFO L87 Difference]: Start difference. First operand 2977 states and 8147 transitions. Second operand 17 states. [2020-04-18 03:14:37,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:37,509 INFO L93 Difference]: Finished difference Result 5018 states and 13020 transitions. [2020-04-18 03:14:37,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-18 03:14:37,509 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:14:37,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:37,515 INFO L225 Difference]: With dead ends: 5018 [2020-04-18 03:14:37,515 INFO L226 Difference]: Without dead ends: 4866 [2020-04-18 03:14:37,516 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=420, Invalid=1650, Unknown=0, NotChecked=0, Total=2070 [2020-04-18 03:14:37,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2020-04-18 03:14:37,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 3057. [2020-04-18 03:14:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3057 states. [2020-04-18 03:14:37,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3057 states to 3057 states and 8397 transitions. [2020-04-18 03:14:37,555 INFO L78 Accepts]: Start accepts. Automaton has 3057 states and 8397 transitions. Word has length 47 [2020-04-18 03:14:37,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:37,555 INFO L479 AbstractCegarLoop]: Abstraction has 3057 states and 8397 transitions. [2020-04-18 03:14:37,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:14:37,555 INFO L276 IsEmpty]: Start isEmpty. Operand 3057 states and 8397 transitions. [2020-04-18 03:14:37,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:14:37,558 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:37,558 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:14:37,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:37,759 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:37,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:37,760 INFO L82 PathProgramCache]: Analyzing trace with hash -337627235, now seen corresponding path program 15 times [2020-04-18 03:14:37,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:37,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211421984] [2020-04-18 03:14:37,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:37,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211421984] [2020-04-18 03:14:37,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520045135] [2020-04-18 03:14:37,910 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 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 03:14:37,971 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 03:14:37,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:14:37,972 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:14:37,973 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:38,134 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:38,170 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:38,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:38,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:14:38,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95082597] [2020-04-18 03:14:38,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:14:38,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:38,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:14:38,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:14:38,178 INFO L87 Difference]: Start difference. First operand 3057 states and 8397 transitions. Second operand 17 states. [2020-04-18 03:14:39,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:39,325 INFO L93 Difference]: Finished difference Result 6139 states and 16227 transitions. [2020-04-18 03:14:39,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-04-18 03:14:39,325 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:14:39,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:39,333 INFO L225 Difference]: With dead ends: 6139 [2020-04-18 03:14:39,333 INFO L226 Difference]: Without dead ends: 5605 [2020-04-18 03:14:39,334 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=507, Invalid=2249, Unknown=0, NotChecked=0, Total=2756 [2020-04-18 03:14:39,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5605 states. [2020-04-18 03:14:39,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5605 to 2912. [2020-04-18 03:14:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2912 states. [2020-04-18 03:14:39,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2912 states to 2912 states and 7955 transitions. [2020-04-18 03:14:39,380 INFO L78 Accepts]: Start accepts. Automaton has 2912 states and 7955 transitions. Word has length 47 [2020-04-18 03:14:39,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:39,380 INFO L479 AbstractCegarLoop]: Abstraction has 2912 states and 7955 transitions. [2020-04-18 03:14:39,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:14:39,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2912 states and 7955 transitions. [2020-04-18 03:14:39,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:14:39,384 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:39,384 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:14:39,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:39,586 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:39,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:39,587 INFO L82 PathProgramCache]: Analyzing trace with hash 779959919, now seen corresponding path program 16 times [2020-04-18 03:14:39,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:39,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658192161] [2020-04-18 03:14:39,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:39,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:39,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658192161] [2020-04-18 03:14:39,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029643029] [2020-04-18 03:14:39,723 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 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 03:14:39,767 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:14:39,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:14:39,768 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:14:39,769 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:40,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:40,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:40,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:14:40,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158177876] [2020-04-18 03:14:40,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:14:40,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:40,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:14:40,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:14:40,331 INFO L87 Difference]: Start difference. First operand 2912 states and 7955 transitions. Second operand 17 states. [2020-04-18 03:14:41,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:41,409 INFO L93 Difference]: Finished difference Result 4783 states and 12232 transitions. [2020-04-18 03:14:41,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-18 03:14:41,409 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:14:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:41,414 INFO L225 Difference]: With dead ends: 4783 [2020-04-18 03:14:41,414 INFO L226 Difference]: Without dead ends: 4631 [2020-04-18 03:14:41,415 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=332, Invalid=1308, Unknown=0, NotChecked=0, Total=1640 [2020-04-18 03:14:41,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4631 states. [2020-04-18 03:14:41,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4631 to 2992. [2020-04-18 03:14:41,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2992 states. [2020-04-18 03:14:41,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2992 states to 2992 states and 8205 transitions. [2020-04-18 03:14:41,452 INFO L78 Accepts]: Start accepts. Automaton has 2992 states and 8205 transitions. Word has length 47 [2020-04-18 03:14:41,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:41,452 INFO L479 AbstractCegarLoop]: Abstraction has 2992 states and 8205 transitions. [2020-04-18 03:14:41,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:14:41,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2992 states and 8205 transitions. [2020-04-18 03:14:41,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:14:41,456 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:41,456 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:14:41,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:41,658 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:41,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:41,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1515505025, now seen corresponding path program 17 times [2020-04-18 03:14:41,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:41,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893542] [2020-04-18 03:14:41,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:41,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:41,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893542] [2020-04-18 03:14:41,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374182020] [2020-04-18 03:14:41,798 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 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 03:14:41,842 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-18 03:14:41,843 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:14:41,844 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:14:41,845 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:41,984 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:41,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:41,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:14:41,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422875066] [2020-04-18 03:14:41,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:14:41,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:41,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:14:41,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:14:41,992 INFO L87 Difference]: Start difference. First operand 2992 states and 8205 transitions. Second operand 17 states. [2020-04-18 03:14:42,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:14:42,937 INFO L93 Difference]: Finished difference Result 5297 states and 13812 transitions. [2020-04-18 03:14:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-18 03:14:42,937 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:14:42,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:14:42,944 INFO L225 Difference]: With dead ends: 5297 [2020-04-18 03:14:42,945 INFO L226 Difference]: Without dead ends: 5145 [2020-04-18 03:14:42,945 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=1574, Unknown=0, NotChecked=0, Total=1980 [2020-04-18 03:14:42,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5145 states. [2020-04-18 03:14:42,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5145 to 3072. [2020-04-18 03:14:42,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3072 states. [2020-04-18 03:14:42,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3072 states to 3072 states and 8455 transitions. [2020-04-18 03:14:42,988 INFO L78 Accepts]: Start accepts. Automaton has 3072 states and 8455 transitions. Word has length 47 [2020-04-18 03:14:42,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:14:42,988 INFO L479 AbstractCegarLoop]: Abstraction has 3072 states and 8455 transitions. [2020-04-18 03:14:42,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:14:42,988 INFO L276 IsEmpty]: Start isEmpty. Operand 3072 states and 8455 transitions. [2020-04-18 03:14:42,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:14:42,992 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:14:42,992 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:14:43,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:14:43,193 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:14:43,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:14:43,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1324229195, now seen corresponding path program 18 times [2020-04-18 03:14:43,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:14:43,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892602792] [2020-04-18 03:14:43,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:14:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:14:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:43,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892602792] [2020-04-18 03:14:43,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667535892] [2020-04-18 03:14:43,345 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 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 03:14:43,397 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-18 03:14:43,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:14:43,398 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:14:43,400 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:14:44,048 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:44,548 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:14:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:14:44,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:14:44,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:14:44,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965776137] [2020-04-18 03:14:44,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:14:44,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:14:44,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:14:44,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=246, Unknown=1, NotChecked=0, Total=306 [2020-04-18 03:14:44,555 INFO L87 Difference]: Start difference. First operand 3072 states and 8455 transitions. Second operand 18 states. [2020-04-18 03:14:46,649 WARN L192 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2020-04-18 03:14:49,154 WARN L192 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-04-18 03:14:57,549 WARN L192 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2020-04-18 03:15:22,206 WARN L192 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2020-04-18 03:15:23,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:15:23,545 INFO L93 Difference]: Finished difference Result 6880 states and 18296 transitions. [2020-04-18 03:15:23,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-04-18 03:15:23,546 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:15:23,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:15:23,554 INFO L225 Difference]: With dead ends: 6880 [2020-04-18 03:15:23,554 INFO L226 Difference]: Without dead ends: 6243 [2020-04-18 03:15:23,555 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=615, Invalid=2675, Unknown=16, NotChecked=0, Total=3306 [2020-04-18 03:15:23,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6243 states. [2020-04-18 03:15:23,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6243 to 2996. [2020-04-18 03:15:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2996 states. [2020-04-18 03:15:23,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2996 states to 2996 states and 8188 transitions. [2020-04-18 03:15:23,602 INFO L78 Accepts]: Start accepts. Automaton has 2996 states and 8188 transitions. Word has length 47 [2020-04-18 03:15:23,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:15:23,602 INFO L479 AbstractCegarLoop]: Abstraction has 2996 states and 8188 transitions. [2020-04-18 03:15:23,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:15:23,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2996 states and 8188 transitions. [2020-04-18 03:15:23,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:15:23,606 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:15:23,606 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:15:23,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:15:23,807 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:15:23,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:15:23,807 INFO L82 PathProgramCache]: Analyzing trace with hash 986491003, now seen corresponding path program 19 times [2020-04-18 03:15:23,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:15:23,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362246498] [2020-04-18 03:15:23,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:15:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:15:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:15:23,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362246498] [2020-04-18 03:15:23,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6265268] [2020-04-18 03:15:23,941 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 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 03:15:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:15:23,988 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:15:23,989 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:15:24,588 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:15:24,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:15:24,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:15:24,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:15:24,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120187030] [2020-04-18 03:15:24,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:15:24,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:15:24,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:15:24,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:15:24,594 INFO L87 Difference]: Start difference. First operand 2996 states and 8188 transitions. Second operand 17 states. [2020-04-18 03:15:25,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:15:25,011 INFO L93 Difference]: Finished difference Result 4630 states and 11878 transitions. [2020-04-18 03:15:25,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-18 03:15:25,012 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:15:25,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:15:25,017 INFO L225 Difference]: With dead ends: 4630 [2020-04-18 03:15:25,018 INFO L226 Difference]: Without dead ends: 4478 [2020-04-18 03:15:25,018 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2020-04-18 03:15:25,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4478 states. [2020-04-18 03:15:25,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4478 to 3055. [2020-04-18 03:15:25,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3055 states. [2020-04-18 03:15:25,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3055 states to 3055 states and 8316 transitions. [2020-04-18 03:15:25,054 INFO L78 Accepts]: Start accepts. Automaton has 3055 states and 8316 transitions. Word has length 47 [2020-04-18 03:15:25,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:15:25,054 INFO L479 AbstractCegarLoop]: Abstraction has 3055 states and 8316 transitions. [2020-04-18 03:15:25,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:15:25,055 INFO L276 IsEmpty]: Start isEmpty. Operand 3055 states and 8316 transitions. [2020-04-18 03:15:25,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:15:25,057 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:15:25,058 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:15:25,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:15:25,261 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:15:25,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:15:25,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1744158155, now seen corresponding path program 20 times [2020-04-18 03:15:25,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:15:25,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134721706] [2020-04-18 03:15:25,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:15:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:15:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:15:25,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134721706] [2020-04-18 03:15:25,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032056320] [2020-04-18 03:15:25,399 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 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 03:15:25,441 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:15:25,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:15:25,442 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:15:25,444 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:15:25,579 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:15:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:15:25,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:15:25,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:15:25,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993652764] [2020-04-18 03:15:25,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:15:25,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:15:25,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:15:25,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:15:25,585 INFO L87 Difference]: Start difference. First operand 3055 states and 8316 transitions. Second operand 17 states. [2020-04-18 03:15:26,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:15:26,001 INFO L93 Difference]: Finished difference Result 4522 states and 11658 transitions. [2020-04-18 03:15:26,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-18 03:15:26,002 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:15:26,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:15:26,008 INFO L225 Difference]: With dead ends: 4522 [2020-04-18 03:15:26,008 INFO L226 Difference]: Without dead ends: 4370 [2020-04-18 03:15:26,009 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2020-04-18 03:15:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4370 states. [2020-04-18 03:15:26,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4370 to 3021. [2020-04-18 03:15:26,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3021 states. [2020-04-18 03:15:26,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 8243 transitions. [2020-04-18 03:15:26,078 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 8243 transitions. Word has length 47 [2020-04-18 03:15:26,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:15:26,078 INFO L479 AbstractCegarLoop]: Abstraction has 3021 states and 8243 transitions. [2020-04-18 03:15:26,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:15:26,079 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 8243 transitions. [2020-04-18 03:15:26,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:15:26,082 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:15:26,083 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:15:26,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:15:26,285 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:15:26,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:15:26,286 INFO L82 PathProgramCache]: Analyzing trace with hash 828902565, now seen corresponding path program 21 times [2020-04-18 03:15:26,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:15:26,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417134481] [2020-04-18 03:15:26,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:15:26,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:15:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:15:26,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417134481] [2020-04-18 03:15:26,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395083609] [2020-04-18 03:15:26,504 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 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 03:15:26,583 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 03:15:26,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:15:26,586 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:15:26,587 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:15:26,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:15:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:15:26,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:15:26,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:15:26,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136374992] [2020-04-18 03:15:26,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:15:26,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:15:26,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:15:26,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:15:26,827 INFO L87 Difference]: Start difference. First operand 3021 states and 8243 transitions. Second operand 17 states. [2020-04-18 03:15:27,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:15:27,272 INFO L93 Difference]: Finished difference Result 4855 states and 12333 transitions. [2020-04-18 03:15:27,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-18 03:15:27,273 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:15:27,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:15:27,279 INFO L225 Difference]: With dead ends: 4855 [2020-04-18 03:15:27,279 INFO L226 Difference]: Without dead ends: 4703 [2020-04-18 03:15:27,280 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2020-04-18 03:15:27,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4703 states. [2020-04-18 03:15:27,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4703 to 3055. [2020-04-18 03:15:27,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3055 states. [2020-04-18 03:15:27,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3055 states to 3055 states and 8316 transitions. [2020-04-18 03:15:27,320 INFO L78 Accepts]: Start accepts. Automaton has 3055 states and 8316 transitions. Word has length 47 [2020-04-18 03:15:27,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:15:27,320 INFO L479 AbstractCegarLoop]: Abstraction has 3055 states and 8316 transitions. [2020-04-18 03:15:27,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:15:27,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3055 states and 8316 transitions. [2020-04-18 03:15:27,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:15:27,324 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:15:27,324 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:15:27,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:15:27,525 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:15:27,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:15:27,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1901746593, now seen corresponding path program 22 times [2020-04-18 03:15:27,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:15:27,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668767739] [2020-04-18 03:15:27,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:15:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:15:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:15:27,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668767739] [2020-04-18 03:15:27,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080234257] [2020-04-18 03:15:27,674 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 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 03:15:27,717 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:15:27,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:15:27,718 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:15:27,719 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:15:27,830 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:15:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:15:27,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:15:27,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:15:27,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972168805] [2020-04-18 03:15:27,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:15:27,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:15:27,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:15:27,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:15:27,838 INFO L87 Difference]: Start difference. First operand 3055 states and 8316 transitions. Second operand 17 states. [2020-04-18 03:15:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:15:28,295 INFO L93 Difference]: Finished difference Result 4717 states and 12063 transitions. [2020-04-18 03:15:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-18 03:15:28,295 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:15:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:15:28,302 INFO L225 Difference]: With dead ends: 4717 [2020-04-18 03:15:28,302 INFO L226 Difference]: Without dead ends: 4565 [2020-04-18 03:15:28,303 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2020-04-18 03:15:28,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4565 states. [2020-04-18 03:15:28,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4565 to 2996. [2020-04-18 03:15:28,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2996 states. [2020-04-18 03:15:28,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2996 states to 2996 states and 8188 transitions. [2020-04-18 03:15:28,341 INFO L78 Accepts]: Start accepts. Automaton has 2996 states and 8188 transitions. Word has length 47 [2020-04-18 03:15:28,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:15:28,341 INFO L479 AbstractCegarLoop]: Abstraction has 2996 states and 8188 transitions. [2020-04-18 03:15:28,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:15:28,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2996 states and 8188 transitions. [2020-04-18 03:15:28,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:15:28,343 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:15:28,343 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:15:28,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:15:28,544 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:15:28,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:15:28,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1018127315, now seen corresponding path program 23 times [2020-04-18 03:15:28,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:15:28,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427543274] [2020-04-18 03:15:28,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:15:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:15:28,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:15:28,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427543274] [2020-04-18 03:15:28,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993883036] [2020-04-18 03:15:28,678 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:15:28,723 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:15:28,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:15:28,724 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:15:28,725 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:15:28,891 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:15:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:15:28,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:15:28,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:15:28,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377161983] [2020-04-18 03:15:28,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:15:28,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:15:28,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:15:28,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:15:28,896 INFO L87 Difference]: Start difference. First operand 2996 states and 8188 transitions. Second operand 17 states. [2020-04-18 03:15:29,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:15:29,496 INFO L93 Difference]: Finished difference Result 4907 states and 12465 transitions. [2020-04-18 03:15:29,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-18 03:15:29,496 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:15:29,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:15:29,501 INFO L225 Difference]: With dead ends: 4907 [2020-04-18 03:15:29,502 INFO L226 Difference]: Without dead ends: 4755 [2020-04-18 03:15:29,502 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=895, Unknown=0, NotChecked=0, Total=1122 [2020-04-18 03:15:29,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4755 states. [2020-04-18 03:15:29,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4755 to 3035. [2020-04-18 03:15:29,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3035 states. [2020-04-18 03:15:29,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3035 states to 3035 states and 8286 transitions. [2020-04-18 03:15:29,540 INFO L78 Accepts]: Start accepts. Automaton has 3035 states and 8286 transitions. Word has length 47 [2020-04-18 03:15:29,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:15:29,540 INFO L479 AbstractCegarLoop]: Abstraction has 3035 states and 8286 transitions. [2020-04-18 03:15:29,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:15:29,540 INFO L276 IsEmpty]: Start isEmpty. Operand 3035 states and 8286 transitions. [2020-04-18 03:15:29,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:15:29,543 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:15:29,543 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:15:29,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:15:29,747 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:15:29,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:15:29,747 INFO L82 PathProgramCache]: Analyzing trace with hash 546190823, now seen corresponding path program 24 times [2020-04-18 03:15:29,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:15:29,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283539187] [2020-04-18 03:15:29,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:15:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:15:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:15:29,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283539187] [2020-04-18 03:15:29,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285932088] [2020-04-18 03:15:29,936 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 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 03:15:29,984 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 03:15:29,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:15:29,985 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:15:29,986 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:15:30,107 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:15:30,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:15:30,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:15:30,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:15:30,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399398551] [2020-04-18 03:15:30,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:15:30,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:15:30,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:15:30,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:15:30,113 INFO L87 Difference]: Start difference. First operand 3035 states and 8286 transitions. Second operand 17 states. [2020-04-18 03:15:30,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:15:30,744 INFO L93 Difference]: Finished difference Result 4767 states and 12178 transitions. [2020-04-18 03:15:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-18 03:15:30,745 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:15:30,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:15:30,752 INFO L225 Difference]: With dead ends: 4767 [2020-04-18 03:15:30,752 INFO L226 Difference]: Without dead ends: 4615 [2020-04-18 03:15:30,753 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 03:15:30,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4615 states. [2020-04-18 03:15:30,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4615 to 3001. [2020-04-18 03:15:30,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3001 states. [2020-04-18 03:15:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3001 states to 3001 states and 8213 transitions. [2020-04-18 03:15:30,790 INFO L78 Accepts]: Start accepts. Automaton has 3001 states and 8213 transitions. Word has length 47 [2020-04-18 03:15:30,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:15:30,790 INFO L479 AbstractCegarLoop]: Abstraction has 3001 states and 8213 transitions. [2020-04-18 03:15:30,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:15:30,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3001 states and 8213 transitions. [2020-04-18 03:15:30,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:15:30,793 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:15:30,793 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:15:30,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:15:30,994 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:15:30,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:15:30,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1886332977, now seen corresponding path program 25 times [2020-04-18 03:15:30,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:15:30,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441943036] [2020-04-18 03:15:30,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:15:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:15:31,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:15:31,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441943036] [2020-04-18 03:15:31,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567533134] [2020-04-18 03:15:31,131 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 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 03:15:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:15:31,172 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:15:31,173 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:15:31,302 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:15:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:15:31,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:15:31,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:15:31,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483809141] [2020-04-18 03:15:31,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:15:31,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:15:31,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:15:31,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:15:31,308 INFO L87 Difference]: Start difference. First operand 3001 states and 8213 transitions. Second operand 17 states. [2020-04-18 03:15:31,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:15:31,980 INFO L93 Difference]: Finished difference Result 5154 states and 13178 transitions. [2020-04-18 03:15:31,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-18 03:15:31,980 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:15:31,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:15:31,987 INFO L225 Difference]: With dead ends: 5154 [2020-04-18 03:15:31,987 INFO L226 Difference]: Without dead ends: 5002 [2020-04-18 03:15:31,988 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2020-04-18 03:15:31,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5002 states. [2020-04-18 03:15:32,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5002 to 3065. [2020-04-18 03:15:32,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3065 states. [2020-04-18 03:15:32,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 8426 transitions. [2020-04-18 03:15:32,035 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 8426 transitions. Word has length 47 [2020-04-18 03:15:32,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:15:32,036 INFO L479 AbstractCegarLoop]: Abstraction has 3065 states and 8426 transitions. [2020-04-18 03:15:32,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:15:32,036 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 8426 transitions. [2020-04-18 03:15:32,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:15:32,039 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:15:32,040 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:15:32,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:15:32,243 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:15:32,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:15:32,244 INFO L82 PathProgramCache]: Analyzing trace with hash 383522491, now seen corresponding path program 26 times [2020-04-18 03:15:32,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:15:32,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628923979] [2020-04-18 03:15:32,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:15:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:15:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:15:32,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628923979] [2020-04-18 03:15:32,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262734829] [2020-04-18 03:15:32,425 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 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 03:15:32,508 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:15:32,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:15:32,510 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:15:32,511 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:15:32,837 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2020-04-18 03:15:32,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:15:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:15:32,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:15:32,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:15:32,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846339656] [2020-04-18 03:15:32,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:15:32,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:15:32,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:15:32,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:15:32,883 INFO L87 Difference]: Start difference. First operand 3065 states and 8426 transitions. Second operand 17 states. [2020-04-18 03:15:33,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:15:33,842 INFO L93 Difference]: Finished difference Result 5529 states and 14408 transitions. [2020-04-18 03:15:33,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-18 03:15:33,843 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:15:33,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:15:33,849 INFO L225 Difference]: With dead ends: 5529 [2020-04-18 03:15:33,850 INFO L226 Difference]: Without dead ends: 5377 [2020-04-18 03:15:33,850 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2020-04-18 03:15:33,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5377 states. [2020-04-18 03:15:33,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5377 to 3195. [2020-04-18 03:15:33,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3195 states. [2020-04-18 03:15:33,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 8846 transitions. [2020-04-18 03:15:33,897 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 8846 transitions. Word has length 47 [2020-04-18 03:15:33,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:15:33,898 INFO L479 AbstractCegarLoop]: Abstraction has 3195 states and 8846 transitions. [2020-04-18 03:15:33,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:15:33,898 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 8846 transitions. [2020-04-18 03:15:33,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:15:33,900 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:15:33,901 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:15:34,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:15:34,101 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:15:34,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:15:34,102 INFO L82 PathProgramCache]: Analyzing trace with hash -933362225, now seen corresponding path program 27 times [2020-04-18 03:15:34,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:15:34,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412076109] [2020-04-18 03:15:34,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:15:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:15:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:15:34,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412076109] [2020-04-18 03:15:34,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69469720] [2020-04-18 03:15:34,240 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:15:34,283 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-18 03:15:34,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:15:34,284 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:15:34,285 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:15:34,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:15:35,414 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:15:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:15:35,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:15:35,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2020-04-18 03:15:35,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999257558] [2020-04-18 03:15:35,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-18 03:15:35,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:15:35,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-18 03:15:35,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=247, Unknown=1, NotChecked=0, Total=306 [2020-04-18 03:15:35,432 INFO L87 Difference]: Start difference. First operand 3195 states and 8846 transitions. Second operand 18 states. [2020-04-18 03:15:38,159 WARN L192 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-04-18 03:15:51,203 WARN L192 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-04-18 03:15:52,095 WARN L192 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-04-18 03:16:04,291 WARN L192 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-04-18 03:16:05,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:16:05,681 INFO L93 Difference]: Finished difference Result 6557 states and 17386 transitions. [2020-04-18 03:16:05,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-04-18 03:16:05,681 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-04-18 03:16:05,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:16:05,689 INFO L225 Difference]: With dead ends: 6557 [2020-04-18 03:16:05,689 INFO L226 Difference]: Without dead ends: 6178 [2020-04-18 03:16:05,690 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=577, Invalid=2381, Unknown=12, NotChecked=0, Total=2970 [2020-04-18 03:16:05,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6178 states. [2020-04-18 03:16:05,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6178 to 2985. [2020-04-18 03:16:05,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2985 states. [2020-04-18 03:16:05,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2985 states to 2985 states and 8192 transitions. [2020-04-18 03:16:05,742 INFO L78 Accepts]: Start accepts. Automaton has 2985 states and 8192 transitions. Word has length 47 [2020-04-18 03:16:05,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:16:05,743 INFO L479 AbstractCegarLoop]: Abstraction has 2985 states and 8192 transitions. [2020-04-18 03:16:05,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-18 03:16:05,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states and 8192 transitions. [2020-04-18 03:16:05,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:16:05,746 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:16:05,746 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:16:05,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:16:05,947 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:16:05,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:16:05,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1874918385, now seen corresponding path program 28 times [2020-04-18 03:16:05,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:16:05,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615728923] [2020-04-18 03:16:05,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:16:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:16:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:16:06,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615728923] [2020-04-18 03:16:06,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871571254] [2020-04-18 03:16:06,103 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 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 03:16:06,155 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:16:06,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:16:06,157 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:16:06,158 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:16:06,400 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:16:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:16:06,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:16:06,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:16:06,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048130470] [2020-04-18 03:16:06,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:16:06,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:16:06,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:16:06,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:16:06,413 INFO L87 Difference]: Start difference. First operand 2985 states and 8192 transitions. Second operand 17 states. [2020-04-18 03:16:07,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:16:07,553 INFO L93 Difference]: Finished difference Result 4793 states and 12342 transitions. [2020-04-18 03:16:07,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-18 03:16:07,553 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:16:07,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:16:07,560 INFO L225 Difference]: With dead ends: 4793 [2020-04-18 03:16:07,560 INFO L226 Difference]: Without dead ends: 4641 [2020-04-18 03:16:07,561 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=369, Invalid=1437, Unknown=0, NotChecked=0, Total=1806 [2020-04-18 03:16:07,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2020-04-18 03:16:07,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 2996. [2020-04-18 03:16:07,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2996 states. [2020-04-18 03:16:07,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2996 states to 2996 states and 8248 transitions. [2020-04-18 03:16:07,619 INFO L78 Accepts]: Start accepts. Automaton has 2996 states and 8248 transitions. Word has length 47 [2020-04-18 03:16:07,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:16:07,619 INFO L479 AbstractCegarLoop]: Abstraction has 2996 states and 8248 transitions. [2020-04-18 03:16:07,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:16:07,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2996 states and 8248 transitions. [2020-04-18 03:16:07,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:16:07,622 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:16:07,623 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:16:07,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:16:07,834 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:16:07,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:16:07,835 INFO L82 PathProgramCache]: Analyzing trace with hash 124583967, now seen corresponding path program 29 times [2020-04-18 03:16:07,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:16:07,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986047725] [2020-04-18 03:16:07,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:16:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:16:07,971 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:16:07,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986047725] [2020-04-18 03:16:07,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933543446] [2020-04-18 03:16:07,972 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 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 03:16:08,020 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:16:08,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:16:08,021 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:16:08,022 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:16:08,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:16:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:16:08,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:16:08,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:16:08,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171300397] [2020-04-18 03:16:08,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:16:08,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:16:08,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:16:08,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:16:08,146 INFO L87 Difference]: Start difference. First operand 2996 states and 8248 transitions. Second operand 17 states. [2020-04-18 03:16:09,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:16:09,128 INFO L93 Difference]: Finished difference Result 5022 states and 13097 transitions. [2020-04-18 03:16:09,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-18 03:16:09,128 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:16:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:16:09,136 INFO L225 Difference]: With dead ends: 5022 [2020-04-18 03:16:09,136 INFO L226 Difference]: Without dead ends: 4870 [2020-04-18 03:16:09,137 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=449, Invalid=1713, Unknown=0, NotChecked=0, Total=2162 [2020-04-18 03:16:09,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4870 states. [2020-04-18 03:16:09,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4870 to 3076. [2020-04-18 03:16:09,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3076 states. [2020-04-18 03:16:09,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3076 states to 3076 states and 8498 transitions. [2020-04-18 03:16:09,205 INFO L78 Accepts]: Start accepts. Automaton has 3076 states and 8498 transitions. Word has length 47 [2020-04-18 03:16:09,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:16:09,206 INFO L479 AbstractCegarLoop]: Abstraction has 3076 states and 8498 transitions. [2020-04-18 03:16:09,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:16:09,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3076 states and 8498 transitions. [2020-04-18 03:16:09,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-18 03:16:09,211 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:16:09,211 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:16:09,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:16:09,415 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:16:09,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:16:09,416 INFO L82 PathProgramCache]: Analyzing trace with hash 315859797, now seen corresponding path program 30 times [2020-04-18 03:16:09,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:16:09,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527448097] [2020-04-18 03:16:09,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:16:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:16:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:16:09,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527448097] [2020-04-18 03:16:09,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663337355] [2020-04-18 03:16:09,544 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 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 03:16:09,586 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-18 03:16:09,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:16:09,588 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 03:16:09,589 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:16:09,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:16:09,688 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:16:09,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:16:09,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:16:09,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-04-18 03:16:09,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19527439] [2020-04-18 03:16:09,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 03:16:09,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:16:09,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 03:16:09,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-04-18 03:16:09,693 INFO L87 Difference]: Start difference. First operand 3076 states and 8498 transitions. Second operand 17 states. [2020-04-18 03:16:10,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:16:10,753 INFO L93 Difference]: Finished difference Result 6084 states and 16245 transitions. [2020-04-18 03:16:10,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-04-18 03:16:10,753 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2020-04-18 03:16:10,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:16:10,760 INFO L225 Difference]: With dead ends: 6084 [2020-04-18 03:16:10,760 INFO L226 Difference]: Without dead ends: 5720 [2020-04-18 03:16:10,761 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=533, Invalid=2119, Unknown=0, NotChecked=0, Total=2652 [2020-04-18 03:16:10,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5720 states. [2020-04-18 03:16:10,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5720 to 2946. [2020-04-18 03:16:10,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2946 states. [2020-04-18 03:16:10,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2946 states to 2946 states and 8078 transitions. [2020-04-18 03:16:10,804 INFO L78 Accepts]: Start accepts. Automaton has 2946 states and 8078 transitions. Word has length 47 [2020-04-18 03:16:10,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:16:10,804 INFO L479 AbstractCegarLoop]: Abstraction has 2946 states and 8078 transitions. [2020-04-18 03:16:10,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 03:16:10,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2946 states and 8078 transitions. [2020-04-18 03:16:10,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:16:10,806 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:16:10,807 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:16:11,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:16:11,009 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:16:11,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:16:11,009 INFO L82 PathProgramCache]: Analyzing trace with hash -523962019, now seen corresponding path program 3 times [2020-04-18 03:16:11,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:16:11,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044264202] [2020-04-18 03:16:11,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:16:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:16:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:16:11,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044264202] [2020-04-18 03:16:11,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113002233] [2020-04-18 03:16:11,270 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 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 03:16:11,344 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-18 03:16:11,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:16:11,346 INFO L264 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:16:11,347 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:16:11,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:16:11,547 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:16:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:16:11,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:16:11,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-04-18 03:16:11,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656819935] [2020-04-18 03:16:11,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 03:16:11,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:16:11,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 03:16:11,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-04-18 03:16:11,557 INFO L87 Difference]: Start difference. First operand 2946 states and 8078 transitions. Second operand 20 states. [2020-04-18 03:16:12,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:16:12,463 INFO L93 Difference]: Finished difference Result 5586 states and 14760 transitions. [2020-04-18 03:16:12,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-18 03:16:12,463 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-04-18 03:16:12,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:16:12,472 INFO L225 Difference]: With dead ends: 5586 [2020-04-18 03:16:12,473 INFO L226 Difference]: Without dead ends: 4998 [2020-04-18 03:16:12,473 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=518, Invalid=2134, Unknown=0, NotChecked=0, Total=2652 [2020-04-18 03:16:12,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4998 states. [2020-04-18 03:16:12,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4998 to 3196. [2020-04-18 03:16:12,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3196 states. [2020-04-18 03:16:12,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3196 states to 3196 states and 8716 transitions. [2020-04-18 03:16:12,538 INFO L78 Accepts]: Start accepts. Automaton has 3196 states and 8716 transitions. Word has length 52 [2020-04-18 03:16:12,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:16:12,538 INFO L479 AbstractCegarLoop]: Abstraction has 3196 states and 8716 transitions. [2020-04-18 03:16:12,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 03:16:12,538 INFO L276 IsEmpty]: Start isEmpty. Operand 3196 states and 8716 transitions. [2020-04-18 03:16:12,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:16:12,542 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:16:12,542 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:16:12,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:16:12,746 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:16:12,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:16:12,746 INFO L82 PathProgramCache]: Analyzing trace with hash -89445980, now seen corresponding path program 31 times [2020-04-18 03:16:12,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:16:12,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767465789] [2020-04-18 03:16:12,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:16:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:16:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:16:12,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767465789] [2020-04-18 03:16:12,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997857327] [2020-04-18 03:16:12,894 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 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 03:16:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:16:12,938 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:16:12,941 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:16:23,223 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-18 03:16:23,224 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:16:23,232 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:16:23,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:16:23,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-04-18 03:16:23,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114077958] [2020-04-18 03:16:23,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 03:16:23,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:16:23,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 03:16:23,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=311, Unknown=4, NotChecked=0, Total=380 [2020-04-18 03:16:23,233 INFO L87 Difference]: Start difference. First operand 3196 states and 8716 transitions. Second operand 20 states. [2020-04-18 03:16:23,989 WARN L192 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-04-18 03:16:28,098 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-04-18 03:16:28,744 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-04-18 03:16:30,803 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 31 [2020-04-18 03:16:32,853 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 25 [2020-04-18 03:16:36,948 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-04-18 03:17:00,864 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2020-04-18 03:17:04,918 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2020-04-18 03:17:11,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:17:11,000 INFO L93 Difference]: Finished difference Result 5176 states and 13183 transitions. [2020-04-18 03:17:11,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-18 03:17:11,001 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-04-18 03:17:11,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:17:11,006 INFO L225 Difference]: With dead ends: 5176 [2020-04-18 03:17:11,006 INFO L226 Difference]: Without dead ends: 5000 [2020-04-18 03:17:11,007 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=324, Invalid=1393, Unknown=5, NotChecked=0, Total=1722 [2020-04-18 03:17:11,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5000 states. [2020-04-18 03:17:11,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5000 to 3235. [2020-04-18 03:17:11,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3235 states. [2020-04-18 03:17:11,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 8811 transitions. [2020-04-18 03:17:11,045 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 8811 transitions. Word has length 52 [2020-04-18 03:17:11,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:17:11,045 INFO L479 AbstractCegarLoop]: Abstraction has 3235 states and 8811 transitions. [2020-04-18 03:17:11,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 03:17:11,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 8811 transitions. [2020-04-18 03:17:11,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:17:11,048 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:17:11,048 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:17:11,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:11,249 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:17:11,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:17:11,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1149491790, now seen corresponding path program 32 times [2020-04-18 03:17:11,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:17:11,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691217911] [2020-04-18 03:17:11,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:17:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:11,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691217911] [2020-04-18 03:17:11,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909603203] [2020-04-18 03:17:11,394 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 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 03:17:11,437 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 03:17:11,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:17:11,438 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:17:11,439 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:17:17,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:17,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:17:17,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-04-18 03:17:17,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564556748] [2020-04-18 03:17:17,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-18 03:17:17,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:17:17,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 03:17:17,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-04-18 03:17:17,201 INFO L87 Difference]: Start difference. First operand 3235 states and 8811 transitions. Second operand 19 states. [2020-04-18 03:17:19,946 WARN L192 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-04-18 03:17:20,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:17:20,238 INFO L93 Difference]: Finished difference Result 5486 states and 14056 transitions. [2020-04-18 03:17:20,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-18 03:17:20,238 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-04-18 03:17:20,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:17:20,245 INFO L225 Difference]: With dead ends: 5486 [2020-04-18 03:17:20,246 INFO L226 Difference]: Without dead ends: 5334 [2020-04-18 03:17:20,246 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=392, Invalid=1677, Unknown=1, NotChecked=0, Total=2070 [2020-04-18 03:17:20,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2020-04-18 03:17:20,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 3315. [2020-04-18 03:17:20,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3315 states. [2020-04-18 03:17:20,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 9061 transitions. [2020-04-18 03:17:20,290 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 9061 transitions. Word has length 52 [2020-04-18 03:17:20,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:17:20,290 INFO L479 AbstractCegarLoop]: Abstraction has 3315 states and 9061 transitions. [2020-04-18 03:17:20,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-18 03:17:20,290 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 9061 transitions. [2020-04-18 03:17:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:17:20,294 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:17:20,294 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:17:20,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:20,498 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:17:20,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:17:20,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1145973154, now seen corresponding path program 33 times [2020-04-18 03:17:20,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:17:20,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083814568] [2020-04-18 03:17:20,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:17:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:20,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083814568] [2020-04-18 03:17:20,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274175023] [2020-04-18 03:17:20,645 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 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 03:17:20,690 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-18 03:17:20,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:17:20,691 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-18 03:17:20,692 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:17:20,890 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:20,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:17:20,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-04-18 03:17:20,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331712879] [2020-04-18 03:17:20,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-18 03:17:20,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:17:20,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 03:17:20,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-04-18 03:17:20,899 INFO L87 Difference]: Start difference. First operand 3315 states and 9061 transitions. Second operand 19 states. [2020-04-18 03:17:21,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:17:21,860 INFO L93 Difference]: Finished difference Result 5888 states and 15409 transitions. [2020-04-18 03:17:21,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-18 03:17:21,860 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-04-18 03:17:21,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:17:21,868 INFO L225 Difference]: With dead ends: 5888 [2020-04-18 03:17:21,868 INFO L226 Difference]: Without dead ends: 5736 [2020-04-18 03:17:21,868 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=410, Invalid=1752, Unknown=0, NotChecked=0, Total=2162 [2020-04-18 03:17:21,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5736 states. [2020-04-18 03:17:21,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5736 to 3395. [2020-04-18 03:17:21,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3395 states. [2020-04-18 03:17:21,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3395 states to 3395 states and 9311 transitions. [2020-04-18 03:17:21,911 INFO L78 Accepts]: Start accepts. Automaton has 3395 states and 9311 transitions. Word has length 52 [2020-04-18 03:17:21,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:17:21,912 INFO L479 AbstractCegarLoop]: Abstraction has 3395 states and 9311 transitions. [2020-04-18 03:17:21,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-18 03:17:21,912 INFO L276 IsEmpty]: Start isEmpty. Operand 3395 states and 9311 transitions. [2020-04-18 03:17:21,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:17:21,914 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:17:21,915 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:17:22,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:22,115 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:17:22,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:17:22,116 INFO L82 PathProgramCache]: Analyzing trace with hash -954697324, now seen corresponding path program 34 times [2020-04-18 03:17:22,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:17:22,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879657708] [2020-04-18 03:17:22,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:17:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:22,272 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:22,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879657708] [2020-04-18 03:17:22,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384272078] [2020-04-18 03:17:22,273 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 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 03:17:22,317 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 03:17:22,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:17:22,319 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:17:22,320 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 03:17:24,605 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:24,656 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-18 03:17:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:24,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 03:17:24,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-04-18 03:17:24,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607007453] [2020-04-18 03:17:24,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-18 03:17:24,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 03:17:24,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-18 03:17:24,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=307, Unknown=2, NotChecked=0, Total=380 [2020-04-18 03:17:24,664 INFO L87 Difference]: Start difference. First operand 3395 states and 9311 transitions. Second operand 20 states. [2020-04-18 03:17:33,110 WARN L192 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-04-18 03:17:35,016 WARN L192 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2020-04-18 03:17:35,475 WARN L192 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2020-04-18 03:17:42,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 03:17:42,240 INFO L93 Difference]: Finished difference Result 7196 states and 18995 transitions. [2020-04-18 03:17:42,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-04-18 03:17:42,240 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-04-18 03:17:42,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 03:17:42,249 INFO L225 Difference]: With dead ends: 7196 [2020-04-18 03:17:42,249 INFO L226 Difference]: Without dead ends: 6656 [2020-04-18 03:17:42,250 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=679, Invalid=3091, Unknown=12, NotChecked=0, Total=3782 [2020-04-18 03:17:42,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6656 states. [2020-04-18 03:17:42,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6656 to 3336. [2020-04-18 03:17:42,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-04-18 03:17:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 9141 transitions. [2020-04-18 03:17:42,307 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 9141 transitions. Word has length 52 [2020-04-18 03:17:42,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 03:17:42,307 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 9141 transitions. [2020-04-18 03:17:42,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-18 03:17:42,307 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 9141 transitions. [2020-04-18 03:17:42,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-04-18 03:17:42,311 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 03:17:42,311 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 03:17:42,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:42,512 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-18 03:17:42,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 03:17:42,512 INFO L82 PathProgramCache]: Analyzing trace with hash 677709364, now seen corresponding path program 35 times [2020-04-18 03:17:42,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 03:17:42,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108030084] [2020-04-18 03:17:42,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 03:17:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 03:17:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 03:17:42,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108030084] [2020-04-18 03:17:42,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530032129] [2020-04-18 03:17:42,676 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 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 03:17:42,727 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-18 03:17:42,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 03:17:42,729 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-18 03:17:42,730 INFO L287 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2020-04-18 03:17:55,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 03:17:55,213 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-18 03:17:55,219 WARN L228 ceAbstractionStarter]: Timeout [2020-04-18 03:17:55,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.04 03:17:55 BasicIcfg [2020-04-18 03:17:55,219 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-18 03:17:55,221 INFO L168 Benchmark]: Toolchain (without parser) took 272820.69 ms. Allocated memory was 137.4 MB in the beginning and 705.2 MB in the end (delta: 567.8 MB). Free memory was 100.8 MB in the beginning and 101.4 MB in the end (delta: -594.1 kB). Peak memory consumption was 567.2 MB. Max. memory is 7.1 GB. [2020-04-18 03:17:55,221 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 137.4 MB. Free memory is still 120.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-04-18 03:17:55,221 INFO L168 Benchmark]: CACSL2BoogieTranslator took 696.59 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 98.9 MB in the beginning and 158.3 MB in the end (delta: -59.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. [2020-04-18 03:17:55,222 INFO L168 Benchmark]: Boogie Procedure Inliner took 77.86 ms. Allocated memory is still 201.3 MB. Free memory was 158.3 MB in the beginning and 156.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-18 03:17:55,222 INFO L168 Benchmark]: Boogie Preprocessor took 27.26 ms. Allocated memory is still 201.3 MB. Free memory was 156.2 MB in the beginning and 155.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 7.1 GB. [2020-04-18 03:17:55,222 INFO L168 Benchmark]: RCFGBuilder took 464.64 ms. Allocated memory is still 201.3 MB. Free memory was 154.2 MB in the beginning and 134.5 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-04-18 03:17:55,222 INFO L168 Benchmark]: TraceAbstraction took 271533.94 ms. Allocated memory was 201.3 MB in the beginning and 705.2 MB in the end (delta: 503.8 MB). Free memory was 133.5 MB in the beginning and 101.4 MB in the end (delta: 32.1 MB). Peak memory consumption was 535.9 MB. Max. memory is 7.1 GB. [2020-04-18 03:17:55,224 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 137.4 MB. Free memory is still 120.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 696.59 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 98.9 MB in the beginning and 158.3 MB in the end (delta: -59.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 77.86 ms. Allocated memory is still 201.3 MB. Free memory was 158.3 MB in the beginning and 156.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.26 ms. Allocated memory is still 201.3 MB. Free memory was 156.2 MB in the beginning and 155.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 464.64 ms. Allocated memory is still 201.3 MB. Free memory was 154.2 MB in the beginning and 134.5 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 271533.94 ms. Allocated memory was 201.3 MB in the beginning and 705.2 MB in the end (delta: 503.8 MB). Free memory was 133.5 MB in the beginning and 101.4 MB in the end (delta: 32.1 MB). Peak memory consumption was 535.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was analyzing trace of length 53 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 19 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 271.4s, OverallIterations: 54, TraceHistogramMax: 6, AutomataDifference: 197.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 5730 SDtfs, 35245 SDslu, 58446 SDs, 0 SdLazy, 10937 SolverSat, 2576 SolverUnsat, 133 SolverUnknown, 0 SolverNotchecked, 107.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3706 GetRequests, 1879 SyntacticMatches, 30 SemanticMatches, 1797 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18244 ImplicationChecksByTransitivity, 127.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3395occurred in iteration=52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.7s AutomataMinimizationTime, 53 MinimizatonAttempts, 83084 StatesRemovedByMinimization, 53 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 45.0s InterpolantComputationTime, 4415 NumberOfCodeBlocks, 4415 NumberOfCodeBlocksAsserted, 157 NumberOfCheckSat, 4315 ConstructedInterpolants, 34 QuantifiedInterpolants, 2008673 SizeOfPredicates, 188 NumberOfNonLiveVariables, 5025 ConjunctsInSsa, 550 ConjunctsInUnsatCore, 100 InterpolantComputations, 6 PerfectInterpolantSequences, 0/1098 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown