/usr/bin/java -Xmx16000000000 -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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 16:13:20,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 16:13:20,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 16:13:20,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 16:13:20,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 16:13:20,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 16:13:20,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 16:13:20,946 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 16:13:20,948 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 16:13:20,951 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 16:13:20,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 16:13:20,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 16:13:20,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 16:13:20,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 16:13:20,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 16:13:20,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 16:13:20,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 16:13:20,961 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 16:13:20,963 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 16:13:20,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 16:13:20,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 16:13:20,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 16:13:20,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 16:13:20,975 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 16:13:20,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-15 16:13:20,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 16:13:21,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 16:13:21,000 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 16:13:21,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 16:13:21,004 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 16:13:21,004 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 16:13:21,005 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 16:13:21,005 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 16:13:21,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 16:13:21,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 16:13:21,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 16:13:21,008 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-15 16:13:21,050 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 16:13:21,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 16:13:21,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 16:13:21,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 16:13:21,053 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 16:13:21,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 16:13:21,053 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 16:13:21,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 16:13:21,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 16:13:21,054 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 16:13:21,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 16:13:21,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 16:13:21,055 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 16:13:21,055 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 16:13:21,055 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 16:13:21,056 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 16:13:21,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 16:13:21,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 16:13:21,056 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 16:13:21,056 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 16:13:21,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 16:13:21,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 16:13:21,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 16:13:21,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 16:13:21,058 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 16:13:21,058 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 16:13:21,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 16:13:21,058 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 16:13:21,058 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 16:13:21,058 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 16:13:21,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 16:13:21,403 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 16:13:21,407 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 16:13:21,409 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 16:13:21,409 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 16:13:21,410 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-10-15 16:13:21,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82a2cce58/cff20d8d91d340f79aca7605195867dd/FLAGf84303bae [2020-10-15 16:13:22,016 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 16:13:22,020 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-10-15 16:13:22,033 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82a2cce58/cff20d8d91d340f79aca7605195867dd/FLAGf84303bae [2020-10-15 16:13:22,314 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82a2cce58/cff20d8d91d340f79aca7605195867dd [2020-10-15 16:13:22,324 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 16:13:22,325 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 16:13:22,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 16:13:22,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 16:13:22,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 16:13:22,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:22,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4767bcde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22, skipping insertion in model container [2020-10-15 16:13:22,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:22,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 16:13:22,380 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 16:13:22,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 16:13:22,818 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 16:13:22,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 16:13:22,933 INFO L208 MainTranslator]: Completed translation [2020-10-15 16:13:22,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22 WrapperNode [2020-10-15 16:13:22,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 16:13:22,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 16:13:22,935 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 16:13:22,935 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 16:13:22,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:22,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:22,982 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 16:13:22,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 16:13:22,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 16:13:22,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 16:13:22,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:22,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:22,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:22,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:23,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:23,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:23,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:23,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 16:13:23,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 16:13:23,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 16:13:23,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 16:13:23,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (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 [2020-10-15 16:13:23,075 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-15 16:13:23,075 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-15 16:13:23,075 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-15 16:13:23,076 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-15 16:13:23,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 16:13:23,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-15 16:13:23,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 16:13:23,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 16:13:23,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-15 16:13:23,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 16:13:23,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 16:13:23,079 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-15 16:13:23,413 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 16:13:23,413 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-15 16:13:23,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:13:23 BoogieIcfgContainer [2020-10-15 16:13:23,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 16:13:23,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 16:13:23,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 16:13:23,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 16:13:23,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:13:22" (1/3) ... [2020-10-15 16:13:23,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@407cc9e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:13:23, skipping insertion in model container [2020-10-15 16:13:23,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (2/3) ... [2020-10-15 16:13:23,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@407cc9e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:13:23, skipping insertion in model container [2020-10-15 16:13:23,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:13:23" (3/3) ... [2020-10-15 16:13:23,429 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2020-10-15 16:13:23,445 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 16:13:23,445 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 16:13:23,455 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 16:13:23,456 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 16:13:23,489 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,490 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,490 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,491 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,491 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,491 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,492 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,492 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,492 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,493 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,493 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,493 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,494 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,494 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,494 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,495 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,495 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,495 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,495 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,496 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,496 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,496 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,497 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,497 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,497 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,498 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,498 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,498 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,499 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,499 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,502 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,503 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,503 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,503 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,503 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,503 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,509 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,509 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,510 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,510 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,510 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,510 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,532 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-15 16:13:23,555 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 16:13:23,555 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 16:13:23,555 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 16:13:23,555 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 16:13:23,555 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 16:13:23,555 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 16:13:23,556 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 16:13:23,556 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 16:13:23,571 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 16:13:23,573 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-15 16:13:23,576 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-15 16:13:23,578 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-15 16:13:23,622 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-15 16:13:23,622 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 16:13:23,628 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-15 16:13:23,631 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-15 16:13:24,705 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-15 16:13:24,791 INFO L132 LiptonReduction]: Checked pairs total: 943 [2020-10-15 16:13:24,792 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-15 16:13:24,800 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-15 16:13:24,813 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-15 16:13:24,815 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-15 16:13:24,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-15 16:13:24,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:24,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-15 16:13:24,824 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:24,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:24,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-10-15 16:13:24,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:24,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11320516] [2020-10-15 16:13:24,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:25,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11320516] [2020-10-15 16:13:25,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:25,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 16:13:25,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116375293] [2020-10-15 16:13:25,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 16:13:25,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:25,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 16:13:25,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 16:13:25,088 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-15 16:13:25,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:25,159 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-15 16:13:25,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 16:13:25,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-15 16:13:25,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:25,174 INFO L225 Difference]: With dead ends: 83 [2020-10-15 16:13:25,175 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 16:13:25,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:13:25,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 16:13:25,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-15 16:13:25,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:13:25,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-15 16:13:25,221 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-15 16:13:25,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:25,221 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-15 16:13:25,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 16:13:25,222 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-15 16:13:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 16:13:25,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:25,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:25,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 16:13:25,224 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:25,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:25,224 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-10-15 16:13:25,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:25,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744082687] [2020-10-15 16:13:25,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:25,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744082687] [2020-10-15 16:13:25,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:25,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 16:13:25,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853271277] [2020-10-15 16:13:25,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 16:13:25,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:25,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 16:13:25,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:13:25,398 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-15 16:13:25,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:25,478 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-15 16:13:25,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:25,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 16:13:25,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:25,481 INFO L225 Difference]: With dead ends: 80 [2020-10-15 16:13:25,482 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 16:13:25,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 16:13:25,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 16:13:25,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-15 16:13:25,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 16:13:25,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-15 16:13:25,494 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-15 16:13:25,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:25,495 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-15 16:13:25,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 16:13:25,496 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-15 16:13:25,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 16:13:25,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:25,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:25,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 16:13:25,497 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:25,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:25,498 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-10-15 16:13:25,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:25,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082377910] [2020-10-15 16:13:25,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:25,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082377910] [2020-10-15 16:13:25,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:25,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 16:13:25,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078253283] [2020-10-15 16:13:25,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 16:13:25,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:25,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 16:13:25,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:13:25,565 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-15 16:13:25,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:25,590 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-15 16:13:25,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 16:13:25,591 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 16:13:25,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:25,592 INFO L225 Difference]: With dead ends: 73 [2020-10-15 16:13:25,593 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 16:13:25,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:13:25,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 16:13:25,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-15 16:13:25,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:13:25,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-15 16:13:25,602 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-15 16:13:25,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:25,602 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-15 16:13:25,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 16:13:25,603 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-15 16:13:25,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 16:13:25,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:25,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:25,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 16:13:25,604 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:25,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:25,605 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-10-15 16:13:25,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:25,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140982828] [2020-10-15 16:13:25,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:25,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140982828] [2020-10-15 16:13:25,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:25,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 16:13:25,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034618776] [2020-10-15 16:13:25,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 16:13:25,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:25,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 16:13:25,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:13:25,669 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-15 16:13:25,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:25,742 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-15 16:13:25,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:25,744 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 16:13:25,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:25,745 INFO L225 Difference]: With dead ends: 86 [2020-10-15 16:13:25,745 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 16:13:25,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 16:13:25,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 16:13:25,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-15 16:13:25,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:13:25,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-15 16:13:25,768 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-15 16:13:25,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:25,768 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-15 16:13:25,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 16:13:25,769 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-15 16:13:25,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 16:13:25,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:25,770 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:25,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 16:13:25,772 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:25,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:25,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-10-15 16:13:25,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:25,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243701728] [2020-10-15 16:13:25,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:25,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:25,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243701728] [2020-10-15 16:13:25,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571782943] [2020-10-15 16:13:25,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:25,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:25,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:25,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:13:25,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:26,045 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:26,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:26,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-15 16:13:26,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077200965] [2020-10-15 16:13:26,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:13:26,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:26,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:13:26,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:13:26,070 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-15 16:13:26,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:26,146 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-15 16:13:26,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:26,146 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-15 16:13:26,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:26,148 INFO L225 Difference]: With dead ends: 101 [2020-10-15 16:13:26,148 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 16:13:26,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:26,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 16:13:26,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-15 16:13:26,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 16:13:26,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-15 16:13:26,156 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-15 16:13:26,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:26,157 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-15 16:13:26,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:13:26,157 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-15 16:13:26,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 16:13:26,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:26,158 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:26,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:26,374 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:26,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:26,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-10-15 16:13:26,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:26,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397656172] [2020-10-15 16:13:26,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:26,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397656172] [2020-10-15 16:13:26,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383957180] [2020-10-15 16:13:26,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-10-15 16:13:26,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:26,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:26,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:13:26,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:26,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:26,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 16:13:26,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091642126] [2020-10-15 16:13:26,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:13:26,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:26,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:13:26,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:26,580 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-15 16:13:26,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:26,611 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-15 16:13:26,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 16:13:26,612 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 16:13:26,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:26,613 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:13:26,613 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 16:13:26,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:26,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 16:13:26,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-15 16:13:26,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:13:26,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-15 16:13:26,627 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-15 16:13:26,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:26,627 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-15 16:13:26,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:13:26,628 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-15 16:13:26,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 16:13:26,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:26,629 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:26,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:26,843 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:26,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:26,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-10-15 16:13:26,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:26,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816806044] [2020-10-15 16:13:26,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:26,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816806044] [2020-10-15 16:13:26,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483017918] [2020-10-15 16:13:26,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:26,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:26,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:26,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:13:26,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:27,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:27,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 16:13:27,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640909652] [2020-10-15 16:13:27,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:13:27,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:27,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:13:27,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:27,075 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-15 16:13:27,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:27,129 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-15 16:13:27,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:27,129 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 16:13:27,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:27,131 INFO L225 Difference]: With dead ends: 90 [2020-10-15 16:13:27,131 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 16:13:27,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:13:27,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 16:13:27,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-15 16:13:27,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:13:27,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-15 16:13:27,141 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-15 16:13:27,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:27,142 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-15 16:13:27,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:13:27,146 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-15 16:13:27,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 16:13:27,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:27,147 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:27,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:27,364 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:27,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:27,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-10-15 16:13:27,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:27,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675983396] [2020-10-15 16:13:27,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:27,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675983396] [2020-10-15 16:13:27,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704536719] [2020-10-15 16:13:27,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:27,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:27,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:27,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:13:27,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:27,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:27,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:27,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 16:13:27,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265129216] [2020-10-15 16:13:27,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:13:27,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:27,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:13:27,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:27,540 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-15 16:13:27,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:27,635 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-15 16:13:27,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:27,635 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 16:13:27,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:27,636 INFO L225 Difference]: With dead ends: 99 [2020-10-15 16:13:27,636 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:13:27,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:13:27,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:13:27,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-15 16:13:27,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 16:13:27,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-15 16:13:27,643 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-15 16:13:27,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:27,644 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-15 16:13:27,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:13:27,644 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-15 16:13:27,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:27,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:27,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:27,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:27,859 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:27,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:27,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-10-15 16:13:27,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:27,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3437050] [2020-10-15 16:13:27,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:27,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:27,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3437050] [2020-10-15 16:13:27,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:27,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:13:27,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301198691] [2020-10-15 16:13:27,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:13:27,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:27,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:13:27,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:27,934 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-15 16:13:27,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:27,964 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-15 16:13:27,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 16:13:27,964 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:13:27,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:27,966 INFO L225 Difference]: With dead ends: 92 [2020-10-15 16:13:27,966 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 16:13:27,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:27,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 16:13:27,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-15 16:13:27,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 16:13:27,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-15 16:13:27,981 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-15 16:13:27,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:27,981 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-15 16:13:27,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:13:27,981 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-15 16:13:27,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:27,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:27,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:27,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 16:13:27,985 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:27,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:27,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-10-15 16:13:27,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:27,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33093516] [2020-10-15 16:13:27,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:28,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33093516] [2020-10-15 16:13:28,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:28,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:13:28,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662975952] [2020-10-15 16:13:28,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:13:28,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:28,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:13:28,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:28,087 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-15 16:13:28,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:28,131 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-15 16:13:28,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:28,132 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:13:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:28,133 INFO L225 Difference]: With dead ends: 100 [2020-10-15 16:13:28,133 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:13:28,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 16:13:28,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:13:28,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-15 16:13:28,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 16:13:28,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-15 16:13:28,144 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-15 16:13:28,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:28,145 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-15 16:13:28,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:13:28,146 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-15 16:13:28,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:28,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:28,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:28,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 16:13:28,147 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:28,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:28,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-10-15 16:13:28,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:28,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332316938] [2020-10-15 16:13:28,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:28,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332316938] [2020-10-15 16:13:28,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:28,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:13:28,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072072870] [2020-10-15 16:13:28,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:13:28,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:28,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:13:28,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:28,203 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-15 16:13:28,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:28,291 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-15 16:13:28,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:28,291 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:13:28,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:28,292 INFO L225 Difference]: With dead ends: 105 [2020-10-15 16:13:28,292 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 16:13:28,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:28,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 16:13:28,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-15 16:13:28,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:13:28,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-15 16:13:28,297 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-15 16:13:28,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:28,298 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-15 16:13:28,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:13:28,298 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-15 16:13:28,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:28,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:28,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:28,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 16:13:28,299 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:28,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:28,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-10-15 16:13:28,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:28,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311700313] [2020-10-15 16:13:28,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:28,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311700313] [2020-10-15 16:13:28,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:28,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:13:28,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170601561] [2020-10-15 16:13:28,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:13:28,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:28,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:13:28,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:28,353 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-15 16:13:28,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:28,418 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-15 16:13:28,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:28,419 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:13:28,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:28,420 INFO L225 Difference]: With dead ends: 105 [2020-10-15 16:13:28,420 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 16:13:28,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:28,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 16:13:28,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-15 16:13:28,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:13:28,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-15 16:13:28,425 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-15 16:13:28,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:28,425 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-15 16:13:28,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:13:28,426 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-15 16:13:28,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:28,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:28,426 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:28,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 16:13:28,427 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:28,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:28,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-10-15 16:13:28,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:28,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684334786] [2020-10-15 16:13:28,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:28,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684334786] [2020-10-15 16:13:28,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015032149] [2020-10-15 16:13:28,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-10-15 16:13:28,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:28,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:28,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:28,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:28,608 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:28,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:28,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-15 16:13:28,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907589512] [2020-10-15 16:13:28,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:13:28,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:28,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:13:28,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:13:28,630 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-15 16:13:28,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:28,717 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-15 16:13:28,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:28,718 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-15 16:13:28,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:28,720 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:13:28,720 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:13:28,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:13:28,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:13:28,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-15 16:13:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:13:28,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-15 16:13:28,726 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-15 16:13:28,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:28,726 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-15 16:13:28,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:13:28,727 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-15 16:13:28,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:28,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:28,727 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:28,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-15 16:13:28,935 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:28,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:28,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-10-15 16:13:28,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:28,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12118298] [2020-10-15 16:13:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:29,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12118298] [2020-10-15 16:13:29,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781290142] [2020-10-15 16:13:29,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-10-15 16:13:29,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:29,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:29,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:29,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:29,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:29,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:29,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949831502] [2020-10-15 16:13:29,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:29,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:29,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:29,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:29,156 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-15 16:13:29,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:29,197 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-15 16:13:29,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:29,198 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 16:13:29,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:29,199 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:13:29,200 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 16:13:29,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:29,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 16:13:29,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-15 16:13:29,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 16:13:29,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-15 16:13:29,205 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-15 16:13:29,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:29,205 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-15 16:13:29,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:29,205 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-15 16:13:29,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:29,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:29,206 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:29,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:29,417 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:29,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:29,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-10-15 16:13:29,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:29,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834710832] [2020-10-15 16:13:29,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:29,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834710832] [2020-10-15 16:13:29,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274568426] [2020-10-15 16:13:29,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-10-15 16:13:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:29,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:29,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:29,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:29,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:29,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907869137] [2020-10-15 16:13:29,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:29,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:29,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:29,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:29,618 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-15 16:13:29,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:29,675 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-15 16:13:29,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:29,675 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 16:13:29,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:29,676 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:13:29,676 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:13:29,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:13:29,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:13:29,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-15 16:13:29,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:13:29,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-15 16:13:29,682 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-15 16:13:29,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:29,682 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-15 16:13:29,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:29,682 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-15 16:13:29,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:29,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:29,683 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:29,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-15 16:13:29,890 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:29,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:29,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-10-15 16:13:29,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:29,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319906584] [2020-10-15 16:13:29,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:29,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319906584] [2020-10-15 16:13:29,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709871157] [2020-10-15 16:13:29,951 INFO L93 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 [2020-10-15 16:13:30,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:30,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:30,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:30,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:30,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:30,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:30,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023272930] [2020-10-15 16:13:30,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:30,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:30,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:30,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:30,093 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-15 16:13:30,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:30,190 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-15 16:13:30,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:30,191 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 16:13:30,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:30,193 INFO L225 Difference]: With dead ends: 115 [2020-10-15 16:13:30,193 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 16:13:30,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:30,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 16:13:30,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-15 16:13:30,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:13:30,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-15 16:13:30,199 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-15 16:13:30,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:30,199 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-15 16:13:30,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:30,199 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-15 16:13:30,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:30,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:30,200 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:30,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-15 16:13:30,407 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:30,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:30,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-10-15 16:13:30,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:30,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720327975] [2020-10-15 16:13:30,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:30,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720327975] [2020-10-15 16:13:30,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700972103] [2020-10-15 16:13:30,480 INFO L93 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 [2020-10-15 16:13:30,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:30,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:30,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:30,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:30,609 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:30,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:30,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:30,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221547038] [2020-10-15 16:13:30,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:30,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:30,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:30,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:30,621 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-15 16:13:30,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:30,734 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-15 16:13:30,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:30,735 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 16:13:30,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:30,736 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:13:30,736 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:13:30,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:13:30,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:13:30,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-15 16:13:30,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:13:30,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-15 16:13:30,740 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-15 16:13:30,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:30,741 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-15 16:13:30,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:30,741 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-15 16:13:30,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:30,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:30,742 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:30,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 16:13:30,953 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:30,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:30,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-10-15 16:13:30,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:30,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925209618] [2020-10-15 16:13:30,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:31,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:31,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925209618] [2020-10-15 16:13:31,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982182787] [2020-10-15 16:13:31,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-10-15 16:13:31,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:31,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:31,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:31,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:31,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:31,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:31,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918214894] [2020-10-15 16:13:31,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:31,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:31,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:31,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:31,211 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-15 16:13:31,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:31,262 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-15 16:13:31,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:31,262 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:31,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:31,263 INFO L225 Difference]: With dead ends: 113 [2020-10-15 16:13:31,263 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 16:13:31,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:31,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 16:13:31,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-15 16:13:31,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 16:13:31,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-15 16:13:31,270 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-15 16:13:31,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:31,270 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-15 16:13:31,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:31,270 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-15 16:13:31,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:31,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:31,271 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:31,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 16:13:31,483 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:31,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:31,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-10-15 16:13:31,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:31,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054513904] [2020-10-15 16:13:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:31,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054513904] [2020-10-15 16:13:31,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550868319] [2020-10-15 16:13:31,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-10-15 16:13:31,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:31,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:31,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:31,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:31,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:31,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:31,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178347996] [2020-10-15 16:13:31,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:31,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:31,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:31,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:31,711 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-15 16:13:31,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:31,775 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-15 16:13:31,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:31,776 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:31,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:31,777 INFO L225 Difference]: With dead ends: 118 [2020-10-15 16:13:31,777 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 16:13:31,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:31,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 16:13:31,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-15 16:13:31,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 16:13:31,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-15 16:13:31,782 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-15 16:13:31,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:31,782 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-15 16:13:31,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:31,782 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-15 16:13:31,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:31,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:31,783 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:31,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:31,984 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:31,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:31,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-10-15 16:13:31,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:31,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677443089] [2020-10-15 16:13:31,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:32,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677443089] [2020-10-15 16:13:32,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718011429] [2020-10-15 16:13:32,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:32,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:32,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:32,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:32,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:32,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714911012] [2020-10-15 16:13:32,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:32,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:32,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:32,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:32,174 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-15 16:13:32,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:32,258 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-15 16:13:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:32,258 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:32,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:32,259 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:13:32,260 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:13:32,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:32,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:13:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-15 16:13:32,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:13:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-15 16:13:32,265 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-15 16:13:32,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:32,265 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-15 16:13:32,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:32,265 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-15 16:13:32,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:32,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:32,266 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:32,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:32,467 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:32,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:32,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-10-15 16:13:32,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:32,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840089406] [2020-10-15 16:13:32,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:32,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840089406] [2020-10-15 16:13:32,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366457691] [2020-10-15 16:13:32,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:32,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:32,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:32,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:32,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:32,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:32,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:32,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854901975] [2020-10-15 16:13:32,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:32,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:32,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:32,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:32,718 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-15 16:13:32,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:32,806 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-15 16:13:32,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:32,806 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:32,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:32,807 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:13:32,808 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 16:13:32,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:13:32,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 16:13:32,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-15 16:13:32,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 16:13:32,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-15 16:13:32,812 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-15 16:13:32,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:32,813 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-15 16:13:32,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:32,813 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-15 16:13:32,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:32,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:32,814 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:33,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-15 16:13:33,024 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:33,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:33,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-10-15 16:13:33,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:33,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77053844] [2020-10-15 16:13:33,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:33,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77053844] [2020-10-15 16:13:33,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447797851] [2020-10-15 16:13:33,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:33,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:33,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:33,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:33,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:33,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:33,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:33,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239884706] [2020-10-15 16:13:33,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:33,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:33,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:33,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:33,215 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-15 16:13:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:33,314 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-15 16:13:33,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:33,315 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:33,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:33,316 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:13:33,316 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:13:33,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:33,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:13:33,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-15 16:13:33,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:13:33,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-15 16:13:33,321 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-15 16:13:33,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:33,321 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-15 16:13:33,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:33,321 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-15 16:13:33,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:33,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:33,322 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:33,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:33,532 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:33,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:33,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-10-15 16:13:33,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:33,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431432113] [2020-10-15 16:13:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:33,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:33,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431432113] [2020-10-15 16:13:33,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118745791] [2020-10-15 16:13:33,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:33,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:33,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:33,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:33,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:33,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:33,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:33,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007572116] [2020-10-15 16:13:33,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:33,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:33,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:33,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:33,706 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-15 16:13:33,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:33,785 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-15 16:13:33,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:33,785 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:33,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:33,786 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:13:33,786 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:13:33,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:33,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:13:33,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-15 16:13:33,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-15 16:13:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-15 16:13:33,791 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-15 16:13:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:33,791 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-15 16:13:33,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:33,791 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-15 16:13:33,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:33,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:33,794 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:34,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-15 16:13:34,002 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:34,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:34,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-10-15 16:13:34,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:34,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292172378] [2020-10-15 16:13:34,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:34,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292172378] [2020-10-15 16:13:34,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53401637] [2020-10-15 16:13:34,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:34,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:34,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:34,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:34,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:34,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:34,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:34,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:34,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784546950] [2020-10-15 16:13:34,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:34,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:34,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:34,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:34,208 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-15 16:13:34,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:34,393 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-15 16:13:34,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:34,394 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:34,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:34,395 INFO L225 Difference]: With dead ends: 133 [2020-10-15 16:13:34,396 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:13:34,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:34,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:13:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-15 16:13:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-15 16:13:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-15 16:13:34,400 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-15 16:13:34,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:34,400 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-15 16:13:34,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:34,400 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-15 16:13:34,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:34,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:34,401 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:34,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:34,602 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:34,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:34,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-10-15 16:13:34,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:34,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575064317] [2020-10-15 16:13:34,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:34,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575064317] [2020-10-15 16:13:34,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110168770] [2020-10-15 16:13:34,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:34,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:34,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:34,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:34,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:34,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:34,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:34,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:34,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342268298] [2020-10-15 16:13:34,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:34,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:34,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:34,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:34,806 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-15 16:13:34,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:34,922 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-15 16:13:34,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:34,922 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:34,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:34,923 INFO L225 Difference]: With dead ends: 127 [2020-10-15 16:13:34,923 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 16:13:34,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:13:34,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 16:13:34,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-15 16:13:34,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:13:34,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-15 16:13:34,928 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-15 16:13:34,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:34,928 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-15 16:13:34,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:34,928 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-15 16:13:34,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:34,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:34,929 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:35,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-15 16:13:35,130 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:35,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:35,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-10-15 16:13:35,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:35,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822335738] [2020-10-15 16:13:35,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:35,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822335738] [2020-10-15 16:13:35,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102752344] [2020-10-15 16:13:35,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:35,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:35,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:35,274 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:35,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:35,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:35,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539675622] [2020-10-15 16:13:35,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:35,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:35,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:35,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:35,289 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-15 16:13:35,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:35,522 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-15 16:13:35,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:13:35,522 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:35,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:35,524 INFO L225 Difference]: With dead ends: 141 [2020-10-15 16:13:35,524 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 16:13:35,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:13:35,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 16:13:35,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-15 16:13:35,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:13:35,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-15 16:13:35,530 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-15 16:13:35,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:35,531 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-15 16:13:35,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:35,531 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-15 16:13:35,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:35,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:35,532 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:35,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-15 16:13:35,743 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:35,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:35,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-10-15 16:13:35,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:35,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562061616] [2020-10-15 16:13:35,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:35,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562061616] [2020-10-15 16:13:35,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685594468] [2020-10-15 16:13:35,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:35,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:35,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:35,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:35,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:35,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:35,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:35,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:35,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747583494] [2020-10-15 16:13:35,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:35,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:35,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:35,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:35,922 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-15 16:13:36,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:36,080 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-15 16:13:36,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:36,083 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:36,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:36,084 INFO L225 Difference]: With dead ends: 136 [2020-10-15 16:13:36,085 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 16:13:36,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:36,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 16:13:36,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-15 16:13:36,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 16:13:36,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-15 16:13:36,089 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-15 16:13:36,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:36,091 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-15 16:13:36,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:36,091 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-15 16:13:36,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:36,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:36,091 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:36,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-15 16:13:36,303 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:36,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:36,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-10-15 16:13:36,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:36,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918052221] [2020-10-15 16:13:36,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:36,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:36,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918052221] [2020-10-15 16:13:36,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56370593] [2020-10-15 16:13:36,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-10-15 16:13:36,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:36,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:36,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:36,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:36,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:36,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:36,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141012404] [2020-10-15 16:13:36,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:36,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:36,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:36,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:36,511 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-15 16:13:36,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:36,626 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-15 16:13:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:36,626 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:36,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:36,628 INFO L225 Difference]: With dead ends: 130 [2020-10-15 16:13:36,628 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:13:36,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:36,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:13:36,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-15 16:13:36,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:13:36,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-15 16:13:36,632 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-15 16:13:36,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:36,632 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-15 16:13:36,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:36,632 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-15 16:13:36,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:36,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:36,633 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:36,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-15 16:13:36,834 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:36,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:36,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-10-15 16:13:36,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:36,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252048308] [2020-10-15 16:13:36,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:36,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252048308] [2020-10-15 16:13:36,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152619269] [2020-10-15 16:13:36,879 INFO L93 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 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 [2020-10-15 16:13:36,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:36,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:36,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:36,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:36,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:37,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:37,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019971696] [2020-10-15 16:13:37,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:37,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:37,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:37,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:37,001 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-15 16:13:37,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:37,134 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-15 16:13:37,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:37,134 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:37,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:37,135 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:13:37,135 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 16:13:37,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:13:37,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 16:13:37,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-15 16:13:37,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 16:13:37,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-15 16:13:37,141 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-15 16:13:37,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:37,141 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-15 16:13:37,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:37,142 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-15 16:13:37,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:37,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:37,142 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:37,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-15 16:13:37,343 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:37,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:37,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-10-15 16:13:37,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:37,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797389827] [2020-10-15 16:13:37,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:37,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:37,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:37,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797389827] [2020-10-15 16:13:37,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443742048] [2020-10-15 16:13:37,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:37,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:37,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:37,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:37,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:37,491 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:37,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:37,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:37,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646730439] [2020-10-15 16:13:37,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:37,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:37,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:37,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:37,500 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-15 16:13:37,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:37,629 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-15 16:13:37,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:37,630 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:37,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:37,631 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:13:37,631 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 16:13:37,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:37,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 16:13:37,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-15 16:13:37,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 16:13:37,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-15 16:13:37,637 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-15 16:13:37,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:37,637 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-15 16:13:37,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:37,637 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-15 16:13:37,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:37,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:37,638 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:37,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:37,850 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:37,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:37,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-10-15 16:13:37,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:37,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834793797] [2020-10-15 16:13:37,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:37,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834793797] [2020-10-15 16:13:37,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793783970] [2020-10-15 16:13:37,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-10-15 16:13:37,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:37,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:37,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:37,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:37,995 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:38,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:38,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:38,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222008143] [2020-10-15 16:13:38,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:38,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:38,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:38,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:38,005 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-15 16:13:38,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:38,207 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-15 16:13:38,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:13:38,209 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:38,210 INFO L225 Difference]: With dead ends: 145 [2020-10-15 16:13:38,210 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 16:13:38,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:13:38,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 16:13:38,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-15 16:13:38,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:13:38,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-15 16:13:38,215 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-15 16:13:38,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:38,215 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-15 16:13:38,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:38,215 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-15 16:13:38,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:38,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:38,216 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:38,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-15 16:13:38,427 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:38,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:38,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-10-15 16:13:38,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:38,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316554612] [2020-10-15 16:13:38,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:38,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316554612] [2020-10-15 16:13:38,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380958606] [2020-10-15 16:13:38,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-10-15 16:13:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:38,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:38,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:38,591 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:38,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:38,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:38,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066628577] [2020-10-15 16:13:38,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:38,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:38,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:38,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:38,602 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-15 16:13:38,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:38,773 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-15 16:13:38,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:38,774 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:38,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:38,776 INFO L225 Difference]: With dead ends: 135 [2020-10-15 16:13:38,776 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 16:13:38,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:38,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 16:13:38,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-15 16:13:38,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:13:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-15 16:13:38,780 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-15 16:13:38,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:38,780 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-15 16:13:38,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:38,780 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-15 16:13:38,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:38,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:38,781 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:38,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:38,992 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:38,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:38,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-10-15 16:13:38,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:38,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473427655] [2020-10-15 16:13:38,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:39,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473427655] [2020-10-15 16:13:39,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193743154] [2020-10-15 16:13:39,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:39,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:39,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:39,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:39,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:39,203 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:39,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:39,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-15 16:13:39,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744454828] [2020-10-15 16:13:39,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:13:39,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:39,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:13:39,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:39,236 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-15 16:13:39,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:39,379 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-15 16:13:39,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:39,379 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-15 16:13:39,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:39,381 INFO L225 Difference]: With dead ends: 143 [2020-10-15 16:13:39,381 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:13:39,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:13:39,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:13:39,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-15 16:13:39,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:13:39,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-15 16:13:39,390 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-15 16:13:39,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:39,391 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-15 16:13:39,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:13:39,391 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-15 16:13:39,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:39,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:39,392 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:39,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-15 16:13:39,605 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:39,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:39,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-10-15 16:13:39,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:39,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755767820] [2020-10-15 16:13:39,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:39,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755767820] [2020-10-15 16:13:39,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746618806] [2020-10-15 16:13:39,747 INFO L93 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 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 [2020-10-15 16:13:39,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:39,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:39,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:39,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:39,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:39,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:39,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195654918] [2020-10-15 16:13:39,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:39,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:39,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:39,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:39,941 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-15 16:13:39,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:39,994 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-15 16:13:39,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:39,995 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:39,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:39,996 INFO L225 Difference]: With dead ends: 132 [2020-10-15 16:13:39,997 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 16:13:39,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:39,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 16:13:40,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-15 16:13:40,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:13:40,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-15 16:13:40,003 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-15 16:13:40,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:40,003 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-15 16:13:40,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:40,004 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-15 16:13:40,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:40,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:40,005 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:40,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-15 16:13:40,218 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:40,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:40,219 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-10-15 16:13:40,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:40,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305661319] [2020-10-15 16:13:40,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:40,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305661319] [2020-10-15 16:13:40,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485857991] [2020-10-15 16:13:40,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:40,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:13:40,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:40,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:40,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:40,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:40,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:40,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950488993] [2020-10-15 16:13:40,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:40,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:40,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:40,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:40,526 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-15 16:13:40,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:40,580 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-15 16:13:40,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:40,581 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:40,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:40,582 INFO L225 Difference]: With dead ends: 143 [2020-10-15 16:13:40,582 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 16:13:40,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:40,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 16:13:40,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-15 16:13:40,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:13:40,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-15 16:13:40,586 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-15 16:13:40,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:40,586 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-15 16:13:40,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:40,587 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-15 16:13:40,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:40,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:40,589 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:40,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-15 16:13:40,799 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:40,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:40,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-10-15 16:13:40,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:40,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434732276] [2020-10-15 16:13:40,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:40,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434732276] [2020-10-15 16:13:40,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133547699] [2020-10-15 16:13:40,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-10-15 16:13:40,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:13:40,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:40,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:40,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:40,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:40,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:40,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253720102] [2020-10-15 16:13:40,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:40,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:40,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:40,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:40,998 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-15 16:13:41,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:41,073 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-15 16:13:41,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:41,074 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:41,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:41,074 INFO L225 Difference]: With dead ends: 142 [2020-10-15 16:13:41,074 INFO L226 Difference]: Without dead ends: 139 [2020-10-15 16:13:41,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:13:41,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-15 16:13:41,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-15 16:13:41,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-15 16:13:41,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-15 16:13:41,077 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-15 16:13:41,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:41,078 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-15 16:13:41,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:41,078 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-15 16:13:41,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:41,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:41,078 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:41,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-15 16:13:41,279 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:41,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:41,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-10-15 16:13:41,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:41,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102366918] [2020-10-15 16:13:41,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:41,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102366918] [2020-10-15 16:13:41,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853695243] [2020-10-15 16:13:41,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-10-15 16:13:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:41,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:41,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:41,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:41,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:41,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342817111] [2020-10-15 16:13:41,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:41,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:41,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:41,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:41,507 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-15 16:13:41,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:41,599 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-15 16:13:41,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:41,600 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:41,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:41,601 INFO L225 Difference]: With dead ends: 141 [2020-10-15 16:13:41,601 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:13:41,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:13:41,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:13:41,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-15 16:13:41,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-15 16:13:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-15 16:13:41,605 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-15 16:13:41,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:41,606 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-15 16:13:41,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:41,606 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-15 16:13:41,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:41,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:41,607 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:41,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-15 16:13:41,807 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:41,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:41,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-10-15 16:13:41,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:41,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164649499] [2020-10-15 16:13:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:41,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164649499] [2020-10-15 16:13:41,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904115348] [2020-10-15 16:13:41,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:41,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:41,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:41,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:41,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:42,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:42,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:42,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:42,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122025732] [2020-10-15 16:13:42,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:42,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:42,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:42,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:42,024 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-15 16:13:42,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:42,170 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-15 16:13:42,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:42,170 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:42,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:42,172 INFO L225 Difference]: With dead ends: 150 [2020-10-15 16:13:42,172 INFO L226 Difference]: Without dead ends: 144 [2020-10-15 16:13:42,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:13:42,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-15 16:13:42,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-15 16:13:42,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-15 16:13:42,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-15 16:13:42,177 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-15 16:13:42,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:42,178 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-15 16:13:42,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:42,178 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-15 16:13:42,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:42,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:42,179 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:42,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:42,391 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:42,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:42,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-10-15 16:13:42,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:42,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138489137] [2020-10-15 16:13:42,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:42,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138489137] [2020-10-15 16:13:42,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950001520] [2020-10-15 16:13:42,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:42,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:42,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:42,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:42,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:42,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:42,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:42,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636849523] [2020-10-15 16:13:42,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:42,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:42,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:42,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:42,598 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-15 16:13:42,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:42,644 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-15 16:13:42,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:42,645 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:42,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:42,646 INFO L225 Difference]: With dead ends: 138 [2020-10-15 16:13:42,646 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 16:13:42,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:42,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 16:13:42,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-15 16:13:42,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-15 16:13:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-15 16:13:42,650 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-15 16:13:42,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:42,650 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-15 16:13:42,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:42,650 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-15 16:13:42,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:42,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:42,651 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:42,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-15 16:13:42,859 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:42,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:42,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-10-15 16:13:42,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:42,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737503177] [2020-10-15 16:13:42,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:42,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737503177] [2020-10-15 16:13:42,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58902876] [2020-10-15 16:13:42,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-10-15 16:13:42,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:42,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:42,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:42,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:43,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:43,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:43,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:43,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545222568] [2020-10-15 16:13:43,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:43,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:43,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:43,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:43,060 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-15 16:13:43,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:43,163 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-15 16:13:43,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:43,165 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:43,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:43,167 INFO L225 Difference]: With dead ends: 145 [2020-10-15 16:13:43,167 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 16:13:43,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:13:43,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 16:13:43,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-15 16:13:43,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-15 16:13:43,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-15 16:13:43,172 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-15 16:13:43,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:43,172 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-15 16:13:43,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:43,172 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-15 16:13:43,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:43,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:43,173 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:43,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-15 16:13:43,379 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:43,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:43,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-10-15 16:13:43,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:43,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574067427] [2020-10-15 16:13:43,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:43,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574067427] [2020-10-15 16:13:43,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171051125] [2020-10-15 16:13:43,442 INFO L93 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 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 [2020-10-15 16:13:43,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:43,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:43,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:43,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:43,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:43,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:43,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153810406] [2020-10-15 16:13:43,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:43,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:43,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:43,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:43,576 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-15 16:13:43,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:43,701 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-15 16:13:43,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:43,701 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:43,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:43,703 INFO L225 Difference]: With dead ends: 150 [2020-10-15 16:13:43,703 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 16:13:43,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:43,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 16:13:43,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-15 16:13:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-15 16:13:43,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-15 16:13:43,708 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-15 16:13:43,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:43,708 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-15 16:13:43,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:43,709 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-15 16:13:43,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:43,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:43,710 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:43,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:43,923 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:43,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:43,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-10-15 16:13:43,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:43,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876212654] [2020-10-15 16:13:43,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:43,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:43,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876212654] [2020-10-15 16:13:43,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911251841] [2020-10-15 16:13:43,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:44,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:13:44,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:44,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:44,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:44,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:44,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:44,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477913604] [2020-10-15 16:13:44,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:44,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:44,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:44,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:44,137 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-15 16:13:44,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:44,254 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-15 16:13:44,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:44,255 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:44,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:44,256 INFO L225 Difference]: With dead ends: 148 [2020-10-15 16:13:44,256 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 16:13:44,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:44,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 16:13:44,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-15 16:13:44,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:44,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-15 16:13:44,260 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-15 16:13:44,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:44,260 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-15 16:13:44,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:44,260 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-15 16:13:44,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:44,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:44,261 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:44,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-15 16:13:44,472 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:44,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:44,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-10-15 16:13:44,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:44,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035084786] [2020-10-15 16:13:44,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:44,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035084786] [2020-10-15 16:13:44,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76093402] [2020-10-15 16:13:44,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:44,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:44,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:44,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:44,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:44,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:44,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:44,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843722980] [2020-10-15 16:13:44,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:44,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:44,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:44,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:44,684 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-15 16:13:44,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:44,806 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-15 16:13:44,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:44,806 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:44,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:44,807 INFO L225 Difference]: With dead ends: 149 [2020-10-15 16:13:44,807 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 16:13:44,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:44,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 16:13:44,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-15 16:13:44,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:13:44,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-15 16:13:44,811 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-15 16:13:44,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:44,812 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-15 16:13:44,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:44,812 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-15 16:13:44,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:44,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:44,813 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:45,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:45,021 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:45,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:45,022 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-10-15 16:13:45,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:45,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985281107] [2020-10-15 16:13:45,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:45,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985281107] [2020-10-15 16:13:45,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722074373] [2020-10-15 16:13:45,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:45,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:45,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:45,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:45,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:45,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089385099] [2020-10-15 16:13:45,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:45,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:45,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:45,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:45,274 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-15 16:13:45,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:45,335 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-15 16:13:45,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:45,335 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:45,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:45,336 INFO L225 Difference]: With dead ends: 152 [2020-10-15 16:13:45,337 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 16:13:45,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:45,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 16:13:45,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-15 16:13:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 16:13:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-15 16:13:45,340 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-15 16:13:45,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:45,341 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-15 16:13:45,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:45,341 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-15 16:13:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:45,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:45,341 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:45,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-15 16:13:45,549 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:45,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:45,550 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-10-15 16:13:45,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:45,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869050619] [2020-10-15 16:13:45,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:45,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869050619] [2020-10-15 16:13:45,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748464455] [2020-10-15 16:13:45,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:45,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:45,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:45,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:45,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:45,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:45,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:45,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146434252] [2020-10-15 16:13:45,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:45,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:45,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:45,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:45,766 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-15 16:13:45,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:45,900 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-15 16:13:45,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:45,901 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:45,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:45,903 INFO L225 Difference]: With dead ends: 153 [2020-10-15 16:13:45,903 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 16:13:45,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:45,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 16:13:45,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-15 16:13:45,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:45,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-15 16:13:45,907 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-15 16:13:45,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:45,907 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-15 16:13:45,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:45,907 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-15 16:13:45,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:45,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:45,908 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:46,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-15 16:13:46,120 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:46,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:46,120 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-10-15 16:13:46,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:46,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923307157] [2020-10-15 16:13:46,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:46,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923307157] [2020-10-15 16:13:46,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339708909] [2020-10-15 16:13:46,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-10-15 16:13:46,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:46,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:46,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:46,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:46,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:46,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:46,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090824173] [2020-10-15 16:13:46,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:46,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:46,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:46,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:46,317 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-15 16:13:46,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:46,465 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 16:13:46,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:46,466 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:46,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:46,467 INFO L225 Difference]: With dead ends: 156 [2020-10-15 16:13:46,467 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 16:13:46,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:13:46,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 16:13:46,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-15 16:13:46,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 16:13:46,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-15 16:13:46,472 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-15 16:13:46,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:46,472 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-15 16:13:46,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:46,473 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-15 16:13:46,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:46,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:46,473 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:46,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-15 16:13:46,684 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:46,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:46,684 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-10-15 16:13:46,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:46,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598722051] [2020-10-15 16:13:46,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:46,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598722051] [2020-10-15 16:13:46,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155534389] [2020-10-15 16:13:46,758 INFO L93 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 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 [2020-10-15 16:13:46,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:46,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:46,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:46,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:46,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:46,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:46,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217688407] [2020-10-15 16:13:46,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:46,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:46,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:46,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:46,897 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-15 16:13:46,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:46,966 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-15 16:13:46,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:46,966 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:46,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:46,967 INFO L225 Difference]: With dead ends: 148 [2020-10-15 16:13:46,967 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 16:13:46,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:13:46,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 16:13:46,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-15 16:13:46,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:13:46,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-15 16:13:46,971 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-15 16:13:46,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:46,971 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-15 16:13:46,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:46,971 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-15 16:13:46,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:46,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:46,972 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:47,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-15 16:13:47,183 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:47,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:47,183 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-10-15 16:13:47,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:47,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584085067] [2020-10-15 16:13:47,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:47,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:47,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584085067] [2020-10-15 16:13:47,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160662504] [2020-10-15 16:13:47,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:47,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:47,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:47,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:47,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:47,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:47,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:47,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539141937] [2020-10-15 16:13:47,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:47,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:47,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:47,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:47,403 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-15 16:13:47,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:47,553 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-15 16:13:47,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:47,554 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:47,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:47,556 INFO L225 Difference]: With dead ends: 157 [2020-10-15 16:13:47,556 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 16:13:47,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:13:47,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 16:13:47,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-15 16:13:47,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:47,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-15 16:13:47,560 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-15 16:13:47,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:47,560 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-15 16:13:47,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:47,560 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-15 16:13:47,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:47,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:47,561 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:47,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:47,772 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:47,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:47,772 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-10-15 16:13:47,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:47,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058623996] [2020-10-15 16:13:47,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:47,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058623996] [2020-10-15 16:13:47,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910091044] [2020-10-15 16:13:47,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-10-15 16:13:47,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:47,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:47,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:13:47,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:47,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:47,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 16:13:47,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185340] [2020-10-15 16:13:47,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:13:47,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:47,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:13:47,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:47,906 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-10-15 16:13:47,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:47,994 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-15 16:13:47,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:47,995 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-15 16:13:47,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:47,996 INFO L225 Difference]: With dead ends: 149 [2020-10-15 16:13:47,996 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 16:13:47,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:13:47,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 16:13:48,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-15 16:13:48,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 16:13:48,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 16:13:48,001 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 16:13:48,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:48,001 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 16:13:48,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:13:48,001 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 16:13:48,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:48,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:48,001 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:48,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-15 16:13:48,202 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:48,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:48,203 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-10-15 16:13:48,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:48,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795448402] [2020-10-15 16:13:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:48,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:48,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795448402] [2020-10-15 16:13:48,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735817265] [2020-10-15 16:13:48,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-10-15 16:13:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:48,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:48,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:48,373 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:48,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:48,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:48,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135702005] [2020-10-15 16:13:48,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:48,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:48,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:48,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:48,410 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 16:13:48,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:48,642 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-15 16:13:48,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:48,642 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:48,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:48,644 INFO L225 Difference]: With dead ends: 164 [2020-10-15 16:13:48,644 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 16:13:48,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:13:48,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 16:13:48,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-15 16:13:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 16:13:48,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-15 16:13:48,648 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-15 16:13:48,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:48,648 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-15 16:13:48,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:48,648 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-15 16:13:48,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:48,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:48,649 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:48,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-15 16:13:48,851 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:48,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:48,851 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-10-15 16:13:48,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:48,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469752077] [2020-10-15 16:13:48,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:48,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469752077] [2020-10-15 16:13:48,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567663978] [2020-10-15 16:13:48,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:48,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:48,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:48,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:48,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:49,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:49,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:49,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:49,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220396917] [2020-10-15 16:13:49,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:49,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:49,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:49,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:49,067 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-15 16:13:49,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:49,247 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 16:13:49,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:49,248 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:49,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:49,250 INFO L225 Difference]: With dead ends: 156 [2020-10-15 16:13:49,250 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 16:13:49,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:13:49,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 16:13:49,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-15 16:13:49,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 16:13:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 16:13:49,253 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 16:13:49,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:49,254 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 16:13:49,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:49,254 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 16:13:49,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:49,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:49,254 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:49,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:49,455 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:49,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:49,456 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-10-15 16:13:49,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:49,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390382912] [2020-10-15 16:13:49,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:49,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390382912] [2020-10-15 16:13:49,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040593462] [2020-10-15 16:13:49,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-10-15 16:13:49,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:49,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:49,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:49,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:49,694 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:49,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:49,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:49,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735424073] [2020-10-15 16:13:49,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:49,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:49,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:49,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:49,740 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 16:13:50,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:50,194 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-15 16:13:50,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:13:50,195 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:50,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:50,197 INFO L225 Difference]: With dead ends: 176 [2020-10-15 16:13:50,197 INFO L226 Difference]: Without dead ends: 171 [2020-10-15 16:13:50,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:13:50,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-15 16:13:50,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-15 16:13:50,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 16:13:50,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 16:13:50,203 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 16:13:50,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:50,204 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 16:13:50,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:50,204 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 16:13:50,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:50,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:50,205 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:50,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-15 16:13:50,418 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:50,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:50,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-10-15 16:13:50,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:50,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291942207] [2020-10-15 16:13:50,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:50,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291942207] [2020-10-15 16:13:50,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730838506] [2020-10-15 16:13:50,501 INFO L93 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 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 [2020-10-15 16:13:50,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:50,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:50,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:50,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:50,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:50,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:50,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:50,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425362914] [2020-10-15 16:13:50,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:50,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:50,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:50,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:50,696 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 16:13:50,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:50,931 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-15 16:13:50,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:50,932 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:50,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:50,933 INFO L225 Difference]: With dead ends: 166 [2020-10-15 16:13:50,933 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 16:13:50,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:13:50,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 16:13:50,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-15 16:13:50,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:13:50,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-15 16:13:50,937 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-15 16:13:50,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:50,938 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-15 16:13:50,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:50,938 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-15 16:13:50,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:50,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:50,939 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:51,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:51,151 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:51,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:51,151 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-10-15 16:13:51,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:51,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172338585] [2020-10-15 16:13:51,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:51,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172338585] [2020-10-15 16:13:51,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359716817] [2020-10-15 16:13:51,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:51,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:51,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:51,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:51,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:51,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:51,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:51,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:51,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504100338] [2020-10-15 16:13:51,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:51,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:51,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:51,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:51,346 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-15 16:13:51,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:51,567 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-15 16:13:51,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:51,567 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:51,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:51,569 INFO L225 Difference]: With dead ends: 163 [2020-10-15 16:13:51,569 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 16:13:51,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:13:51,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 16:13:51,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-15 16:13:51,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-15 16:13:51,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-15 16:13:51,573 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-15 16:13:51,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:51,573 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-15 16:13:51,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:51,574 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-15 16:13:51,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:51,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:51,575 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:51,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-15 16:13:51,775 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:51,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:51,776 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-10-15 16:13:51,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:51,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694928354] [2020-10-15 16:13:51,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:51,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694928354] [2020-10-15 16:13:51,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178864621] [2020-10-15 16:13:51,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-10-15 16:13:51,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:51,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:51,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:51,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:51,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:51,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:51,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087964889] [2020-10-15 16:13:51,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:51,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:51,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:51,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:51,966 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-15 16:13:52,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:52,215 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-15 16:13:52,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:13:52,216 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:52,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:52,217 INFO L225 Difference]: With dead ends: 170 [2020-10-15 16:13:52,218 INFO L226 Difference]: Without dead ends: 168 [2020-10-15 16:13:52,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:13:52,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-15 16:13:52,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-15 16:13:52,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-15 16:13:52,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-15 16:13:52,221 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-15 16:13:52,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:52,222 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-15 16:13:52,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:52,222 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-15 16:13:52,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:52,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:52,223 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:52,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:52,431 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:52,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:52,431 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-10-15 16:13:52,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:52,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362947547] [2020-10-15 16:13:52,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:52,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362947547] [2020-10-15 16:13:52,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878004132] [2020-10-15 16:13:52,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-10-15 16:13:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:52,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:52,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:52,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:52,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:52,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:52,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845032854] [2020-10-15 16:13:52,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:52,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:52,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:52,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:52,608 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-15 16:13:52,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:52,950 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-15 16:13:52,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:13:52,951 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:52,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:52,953 INFO L225 Difference]: With dead ends: 177 [2020-10-15 16:13:52,953 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 16:13:52,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:13:52,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 16:13:52,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-15 16:13:52,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-15 16:13:52,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-15 16:13:52,959 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-15 16:13:52,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:52,960 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-15 16:13:52,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:52,960 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-15 16:13:52,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:52,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:52,961 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:53,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-15 16:13:53,174 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:53,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:53,175 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-10-15 16:13:53,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:53,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16741758] [2020-10-15 16:13:53,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:53,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16741758] [2020-10-15 16:13:53,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119885085] [2020-10-15 16:13:53,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:53,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:53,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:53,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:53,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:53,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:53,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:53,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:53,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934298751] [2020-10-15 16:13:53,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:53,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:53,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:53,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:53,358 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-15 16:13:53,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:53,718 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-15 16:13:53,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:13:53,719 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:53,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:53,720 INFO L225 Difference]: With dead ends: 190 [2020-10-15 16:13:53,721 INFO L226 Difference]: Without dead ends: 182 [2020-10-15 16:13:53,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:13:53,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-15 16:13:53,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-15 16:13:53,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:13:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-15 16:13:53,725 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-15 16:13:53,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:53,725 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-15 16:13:53,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:53,726 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-15 16:13:53,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:53,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:53,726 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:53,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-15 16:13:53,939 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:53,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:53,939 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-10-15 16:13:53,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:53,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632700403] [2020-10-15 16:13:53,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:54,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632700403] [2020-10-15 16:13:54,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498627033] [2020-10-15 16:13:54,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:54,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:13:54,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:54,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:54,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:54,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:54,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:54,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:54,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864464050] [2020-10-15 16:13:54,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:54,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:54,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:54,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:54,128 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-10-15 16:13:54,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:54,460 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-10-15 16:13:54,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:13:54,460 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:54,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:54,461 INFO L225 Difference]: With dead ends: 180 [2020-10-15 16:13:54,462 INFO L226 Difference]: Without dead ends: 175 [2020-10-15 16:13:54,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:13:54,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-15 16:13:54,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-10-15 16:13:54,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:54,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-15 16:13:54,470 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-15 16:13:54,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:54,471 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-15 16:13:54,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:54,471 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-15 16:13:54,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:54,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:54,472 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:54,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-15 16:13:54,684 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:54,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:54,685 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-10-15 16:13:54,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:54,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787402317] [2020-10-15 16:13:54,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:54,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:54,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787402317] [2020-10-15 16:13:54,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478260835] [2020-10-15 16:13:54,746 INFO L93 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:54,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:54,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:54,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:54,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:54,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:54,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:54,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637432105] [2020-10-15 16:13:54,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:54,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:54,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:54,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:54,895 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-15 16:13:55,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:55,028 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-15 16:13:55,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:55,028 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:55,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:55,030 INFO L225 Difference]: With dead ends: 164 [2020-10-15 16:13:55,030 INFO L226 Difference]: Without dead ends: 162 [2020-10-15 16:13:55,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:13:55,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-15 16:13:55,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-15 16:13:55,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:13:55,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-15 16:13:55,034 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-15 16:13:55,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:55,034 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-15 16:13:55,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:55,034 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-15 16:13:55,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:55,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:55,034 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:55,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-15 16:13:55,235 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:55,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:55,236 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-10-15 16:13:55,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:55,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979930902] [2020-10-15 16:13:55,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:55,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979930902] [2020-10-15 16:13:55,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441428898] [2020-10-15 16:13:55,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:55,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:55,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:55,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:55,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:55,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:55,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:55,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:55,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425590994] [2020-10-15 16:13:55,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:55,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:55,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:55,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:55,445 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-15 16:13:55,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:55,590 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-15 16:13:55,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:55,590 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:55,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:55,592 INFO L225 Difference]: With dead ends: 161 [2020-10-15 16:13:55,592 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 16:13:55,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:13:55,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 16:13:55,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-15 16:13:55,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:13:55,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-15 16:13:55,599 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-15 16:13:55,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:55,599 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-15 16:13:55,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:55,599 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-15 16:13:55,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:55,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:55,600 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:55,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-15 16:13:55,810 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:55,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:55,810 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-10-15 16:13:55,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:55,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855007870] [2020-10-15 16:13:55,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:55,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:55,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855007870] [2020-10-15 16:13:55,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577534456] [2020-10-15 16:13:55,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:55,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:13:55,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:55,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:55,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:56,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:56,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:56,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995505007] [2020-10-15 16:13:56,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:56,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:56,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:56,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:56,004 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-15 16:13:56,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:56,184 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-15 16:13:56,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:13:56,185 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:56,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:56,186 INFO L225 Difference]: With dead ends: 165 [2020-10-15 16:13:56,186 INFO L226 Difference]: Without dead ends: 163 [2020-10-15 16:13:56,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:13:56,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-15 16:13:56,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-15 16:13:56,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:13:56,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-15 16:13:56,192 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-15 16:13:56,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:56,192 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-15 16:13:56,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:56,192 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-15 16:13:56,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:56,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:56,193 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:56,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-15 16:13:56,403 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:56,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:56,403 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-10-15 16:13:56,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:56,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552000422] [2020-10-15 16:13:56,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:56,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552000422] [2020-10-15 16:13:56,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444256104] [2020-10-15 16:13:56,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:56,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:56,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:56,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:56,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:56,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394240542] [2020-10-15 16:13:56,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:56,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:56,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:56,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:56,591 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-15 16:13:56,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:56,772 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-15 16:13:56,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:13:56,772 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:56,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:56,774 INFO L225 Difference]: With dead ends: 167 [2020-10-15 16:13:56,774 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 16:13:56,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:13:56,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 16:13:56,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-15 16:13:56,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:13:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-15 16:13:56,778 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-15 16:13:56,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:56,778 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-15 16:13:56,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:56,778 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-15 16:13:56,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:56,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:56,779 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:56,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:56,981 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:56,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:56,981 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-10-15 16:13:56,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:56,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926769447] [2020-10-15 16:13:56,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:57,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926769447] [2020-10-15 16:13:57,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486930496] [2020-10-15 16:13:57,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:57,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:57,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:57,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:57,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:57,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:57,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:57,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406093040] [2020-10-15 16:13:57,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:57,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:57,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:57,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:57,181 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-15 16:13:57,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:57,420 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-15 16:13:57,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:13:57,421 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:57,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:57,422 INFO L225 Difference]: With dead ends: 168 [2020-10-15 16:13:57,422 INFO L226 Difference]: Without dead ends: 166 [2020-10-15 16:13:57,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:13:57,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-15 16:13:57,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-15 16:13:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:57,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-15 16:13:57,426 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-15 16:13:57,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:57,426 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-15 16:13:57,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:57,426 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-15 16:13:57,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:57,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:57,427 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:57,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:57,628 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:57,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:57,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-10-15 16:13:57,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:57,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403569107] [2020-10-15 16:13:57,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:57,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403569107] [2020-10-15 16:13:57,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765388009] [2020-10-15 16:13:57,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:57,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:57,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:57,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:57,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:57,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:57,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:57,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:57,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747174743] [2020-10-15 16:13:57,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:57,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:57,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:57,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:57,800 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-15 16:13:57,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:57,995 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-15 16:13:57,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:57,995 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:57,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:57,997 INFO L225 Difference]: With dead ends: 160 [2020-10-15 16:13:57,997 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 16:13:57,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:13:57,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 16:13:58,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-15 16:13:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:13:58,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-15 16:13:58,001 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-15 16:13:58,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:58,001 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-15 16:13:58,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:58,001 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-15 16:13:58,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:58,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:58,002 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:58,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:58,214 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:58,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:58,214 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-10-15 16:13:58,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:58,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497481269] [2020-10-15 16:13:58,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:58,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497481269] [2020-10-15 16:13:58,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208231541] [2020-10-15 16:13:58,274 INFO L93 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:58,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:58,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:58,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:58,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:58,394 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:58,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:58,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:58,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476797921] [2020-10-15 16:13:58,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:58,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:58,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:58,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:58,425 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-15 16:13:58,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:58,752 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-15 16:13:58,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:13:58,753 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:58,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:58,754 INFO L225 Difference]: With dead ends: 189 [2020-10-15 16:13:58,755 INFO L226 Difference]: Without dead ends: 181 [2020-10-15 16:13:58,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:13:58,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-15 16:13:58,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-15 16:13:58,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:13:58,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-15 16:13:58,759 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-15 16:13:58,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:58,759 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-15 16:13:58,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:58,759 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-15 16:13:58,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:58,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:58,760 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:58,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:58,971 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:58,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:58,972 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-10-15 16:13:58,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:58,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099934955] [2020-10-15 16:13:58,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:59,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099934955] [2020-10-15 16:13:59,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033717768] [2020-10-15 16:13:59,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:59,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:59,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:59,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:59,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:59,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:59,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:59,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:59,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489066086] [2020-10-15 16:13:59,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:59,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:59,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:59,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:59,175 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-15 16:13:59,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:59,416 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-15 16:13:59,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:13:59,417 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:59,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:59,418 INFO L225 Difference]: With dead ends: 169 [2020-10-15 16:13:59,419 INFO L226 Difference]: Without dead ends: 167 [2020-10-15 16:13:59,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:13:59,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-15 16:13:59,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-15 16:13:59,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:59,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-15 16:13:59,422 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-15 16:13:59,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:59,422 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-15 16:13:59,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:59,422 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-15 16:13:59,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:59,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:59,423 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:59,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-15 16:13:59,624 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:59,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:59,624 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-10-15 16:13:59,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:59,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005758318] [2020-10-15 16:13:59,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:59,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005758318] [2020-10-15 16:13:59,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484036541] [2020-10-15 16:13:59,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:59,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:59,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:59,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:59,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:59,788 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:59,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:59,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:59,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567448762] [2020-10-15 16:13:59,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:59,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:59,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:59,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:59,798 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-15 16:14:00,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:00,140 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-15 16:14:00,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:14:00,141 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:00,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:00,142 INFO L225 Difference]: With dead ends: 192 [2020-10-15 16:14:00,143 INFO L226 Difference]: Without dead ends: 184 [2020-10-15 16:14:00,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:14:00,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-15 16:14:00,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-15 16:14:00,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 16:14:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-15 16:14:00,148 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-15 16:14:00,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:00,148 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-15 16:14:00,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:00,149 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-15 16:14:00,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:00,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:00,149 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:00,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:00,362 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:00,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:00,362 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-10-15 16:14:00,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:00,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159253854] [2020-10-15 16:14:00,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:00,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159253854] [2020-10-15 16:14:00,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109522574] [2020-10-15 16:14:00,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:00,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:00,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:00,557 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:00,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:00,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:00,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234469689] [2020-10-15 16:14:00,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:00,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:00,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:00,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:00,573 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-15 16:14:00,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:00,884 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-15 16:14:00,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:14:00,885 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:00,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:00,886 INFO L225 Difference]: With dead ends: 180 [2020-10-15 16:14:00,886 INFO L226 Difference]: Without dead ends: 175 [2020-10-15 16:14:00,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:14:00,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-15 16:14:00,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-15 16:14:00,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-15 16:14:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-15 16:14:00,889 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-15 16:14:00,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:00,890 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-15 16:14:00,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:00,890 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-15 16:14:00,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:00,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:00,891 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:01,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-15 16:14:01,099 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:01,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:01,099 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-10-15 16:14:01,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:01,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176670096] [2020-10-15 16:14:01,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:01,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:01,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176670096] [2020-10-15 16:14:01,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183019006] [2020-10-15 16:14:01,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:01,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:01,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:01,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:01,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:01,306 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:01,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:01,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 16:14:01,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488930503] [2020-10-15 16:14:01,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:14:01,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:01,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:14:01,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:14:01,331 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-15 16:14:01,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:01,471 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-15 16:14:01,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:01,471 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-15 16:14:01,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:01,473 INFO L225 Difference]: With dead ends: 164 [2020-10-15 16:14:01,473 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 16:14:01,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:14:01,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 16:14:01,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-15 16:14:01,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 16:14:01,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-15 16:14:01,476 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-15 16:14:01,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:01,476 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-15 16:14:01,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:14:01,477 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-15 16:14:01,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:01,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:01,477 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:01,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:01,680 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:01,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:01,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-10-15 16:14:01,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:01,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826844112] [2020-10-15 16:14:01,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:01,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826844112] [2020-10-15 16:14:01,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307482224] [2020-10-15 16:14:01,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:01,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:14:01,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:01,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:01,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:01,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:01,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:01,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429084016] [2020-10-15 16:14:01,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:01,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:01,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:01,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:01,961 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-15 16:14:02,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:02,009 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 16:14:02,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:14:02,010 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:02,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:02,011 INFO L225 Difference]: With dead ends: 156 [2020-10-15 16:14:02,011 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 16:14:02,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:02,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 16:14:02,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-15 16:14:02,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 16:14:02,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-15 16:14:02,015 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-15 16:14:02,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:02,015 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-15 16:14:02,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:02,015 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-15 16:14:02,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:02,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:02,016 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:02,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-15 16:14:02,227 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:02,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:02,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-10-15 16:14:02,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:02,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014484855] [2020-10-15 16:14:02,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:02,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014484855] [2020-10-15 16:14:02,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995125842] [2020-10-15 16:14:02,332 INFO L93 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:02,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:02,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:02,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:02,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:02,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:02,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:02,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56802610] [2020-10-15 16:14:02,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:02,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:02,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:02,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:02,495 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-15 16:14:02,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:02,555 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-15 16:14:02,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:14:02,556 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:02,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:02,557 INFO L225 Difference]: With dead ends: 170 [2020-10-15 16:14:02,557 INFO L226 Difference]: Without dead ends: 167 [2020-10-15 16:14:02,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:14:02,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-15 16:14:02,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-15 16:14:02,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 16:14:02,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-15 16:14:02,561 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-15 16:14:02,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:02,563 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-15 16:14:02,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:02,563 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-15 16:14:02,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:02,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:02,564 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:02,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:02,765 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:02,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:02,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-10-15 16:14:02,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:02,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163383664] [2020-10-15 16:14:02,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:02,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:02,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163383664] [2020-10-15 16:14:02,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802007452] [2020-10-15 16:14:02,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:02,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:02,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:02,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:02,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:03,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:03,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:03,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488259753] [2020-10-15 16:14:03,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:03,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:03,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:03,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:03,007 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-15 16:14:03,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:03,089 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-15 16:14:03,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:14:03,090 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:03,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:03,091 INFO L225 Difference]: With dead ends: 169 [2020-10-15 16:14:03,091 INFO L226 Difference]: Without dead ends: 166 [2020-10-15 16:14:03,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:14:03,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-15 16:14:03,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-15 16:14:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-15 16:14:03,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-15 16:14:03,094 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-15 16:14:03,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:03,094 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-15 16:14:03,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:03,094 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-15 16:14:03,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:03,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:03,095 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:03,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:03,300 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:03,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:03,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-10-15 16:14:03,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:03,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862286246] [2020-10-15 16:14:03,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:03,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862286246] [2020-10-15 16:14:03,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6695813] [2020-10-15 16:14:03,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:03,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:14:03,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:03,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:03,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:03,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:03,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:03,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048650116] [2020-10-15 16:14:03,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:03,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:03,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:03,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:03,543 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-15 16:14:03,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:03,661 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-15 16:14:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:14:03,661 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:03,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:03,662 INFO L225 Difference]: With dead ends: 168 [2020-10-15 16:14:03,662 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 16:14:03,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:14:03,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 16:14:03,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-15 16:14:03,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-15 16:14:03,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-15 16:14:03,666 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-15 16:14:03,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:03,666 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-15 16:14:03,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:03,667 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-15 16:14:03,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:03,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:03,667 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:03,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-15 16:14:03,868 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:03,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:03,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-10-15 16:14:03,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:03,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944131756] [2020-10-15 16:14:03,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:03,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944131756] [2020-10-15 16:14:03,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480691503] [2020-10-15 16:14:03,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:03,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:03,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:04,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:04,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:04,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073222867] [2020-10-15 16:14:04,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:04,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:04,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:04,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:04,094 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-15 16:14:04,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:04,226 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-15 16:14:04,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:04,227 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:04,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:04,228 INFO L225 Difference]: With dead ends: 167 [2020-10-15 16:14:04,228 INFO L226 Difference]: Without dead ends: 164 [2020-10-15 16:14:04,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:14:04,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-15 16:14:04,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-15 16:14:04,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-15 16:14:04,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-15 16:14:04,232 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-15 16:14:04,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:04,232 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-15 16:14:04,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:04,232 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-15 16:14:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:04,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:04,232 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:04,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:04,433 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:04,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:04,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-10-15 16:14:04,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:04,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915020725] [2020-10-15 16:14:04,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:04,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:04,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915020725] [2020-10-15 16:14:04,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220923468] [2020-10-15 16:14:04,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:04,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:04,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:04,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:04,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:04,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:04,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:04,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:04,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704893014] [2020-10-15 16:14:04,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:04,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:04,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:04,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:04,651 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-15 16:14:04,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:04,841 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-15 16:14:04,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:04,841 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:04,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:04,843 INFO L225 Difference]: With dead ends: 176 [2020-10-15 16:14:04,843 INFO L226 Difference]: Without dead ends: 170 [2020-10-15 16:14:04,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:04,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-15 16:14:04,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-15 16:14:04,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-15 16:14:04,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-15 16:14:04,847 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-15 16:14:04,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:04,847 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-15 16:14:04,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:04,848 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-15 16:14:04,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:04,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:04,848 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:05,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:05,058 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:05,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:05,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-10-15 16:14:05,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:05,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298889534] [2020-10-15 16:14:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:05,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298889534] [2020-10-15 16:14:05,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406655015] [2020-10-15 16:14:05,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:05,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:05,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:05,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:05,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:05,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:05,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:05,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:05,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439772229] [2020-10-15 16:14:05,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:05,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:05,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:05,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:05,289 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-15 16:14:05,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:05,342 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-15 16:14:05,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:14:05,342 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:05,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:05,344 INFO L225 Difference]: With dead ends: 163 [2020-10-15 16:14:05,344 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 16:14:05,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:05,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 16:14:05,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-15 16:14:05,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-15 16:14:05,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-15 16:14:05,348 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-15 16:14:05,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:05,348 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-15 16:14:05,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:05,349 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-15 16:14:05,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:05,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:05,349 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:05,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-15 16:14:05,550 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:05,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:05,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-10-15 16:14:05,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:05,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347572818] [2020-10-15 16:14:05,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:05,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347572818] [2020-10-15 16:14:05,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888051831] [2020-10-15 16:14:05,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:05,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:05,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:05,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:05,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:05,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:05,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:05,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402629918] [2020-10-15 16:14:05,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:05,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:05,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:05,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:05,793 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-15 16:14:05,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:05,934 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-15 16:14:05,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:14:05,934 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:05,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:05,936 INFO L225 Difference]: With dead ends: 172 [2020-10-15 16:14:05,936 INFO L226 Difference]: Without dead ends: 170 [2020-10-15 16:14:05,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:14:05,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-15 16:14:05,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-15 16:14:05,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 16:14:05,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-15 16:14:05,939 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-15 16:14:05,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:05,940 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-15 16:14:05,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:05,940 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-15 16:14:05,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:05,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:05,941 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:06,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:06,149 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:06,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:06,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-10-15 16:14:06,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:06,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895444992] [2020-10-15 16:14:06,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:06,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895444992] [2020-10-15 16:14:06,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216303613] [2020-10-15 16:14:06,223 INFO L93 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:06,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:06,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:06,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:06,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:06,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:06,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:06,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389845918] [2020-10-15 16:14:06,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:06,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:06,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:06,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:06,958 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-15 16:14:07,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:07,149 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-15 16:14:07,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:14:07,150 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:07,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:07,152 INFO L225 Difference]: With dead ends: 179 [2020-10-15 16:14:07,152 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 16:14:07,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:14:07,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 16:14:07,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-15 16:14:07,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-15 16:14:07,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-15 16:14:07,155 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-15 16:14:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:07,155 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-15 16:14:07,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-15 16:14:07,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:07,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:07,156 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:07,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-15 16:14:07,357 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:07,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:07,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-10-15 16:14:07,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:07,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607809013] [2020-10-15 16:14:07,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:07,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607809013] [2020-10-15 16:14:07,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251311859] [2020-10-15 16:14:07,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:07,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:07,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:07,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:07,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:07,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:07,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:07,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813883663] [2020-10-15 16:14:07,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:07,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:07,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:07,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:07,623 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-15 16:14:07,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:07,798 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-15 16:14:07,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:14:07,799 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:07,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:07,800 INFO L225 Difference]: With dead ends: 179 [2020-10-15 16:14:07,801 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 16:14:07,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:07,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 16:14:07,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-15 16:14:07,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 16:14:07,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-15 16:14:07,804 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-15 16:14:07,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:07,804 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-15 16:14:07,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:07,804 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-15 16:14:07,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:07,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:07,805 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:08,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-15 16:14:08,010 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:08,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:08,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-10-15 16:14:08,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:08,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145466560] [2020-10-15 16:14:08,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:08,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145466560] [2020-10-15 16:14:08,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983691964] [2020-10-15 16:14:08,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:08,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:08,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:08,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:08,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:08,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:08,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:08,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681904438] [2020-10-15 16:14:08,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:08,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:08,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:08,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:08,229 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-15 16:14:08,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:08,423 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-15 16:14:08,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:08,424 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:08,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:08,425 INFO L225 Difference]: With dead ends: 184 [2020-10-15 16:14:08,425 INFO L226 Difference]: Without dead ends: 182 [2020-10-15 16:14:08,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:08,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-15 16:14:08,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-15 16:14:08,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 16:14:08,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-15 16:14:08,429 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-15 16:14:08,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:08,429 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-15 16:14:08,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:08,429 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-15 16:14:08,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:08,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:08,430 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:08,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-15 16:14:08,637 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:08,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:08,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-10-15 16:14:08,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:08,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658587674] [2020-10-15 16:14:08,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:08,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658587674] [2020-10-15 16:14:08,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528345035] [2020-10-15 16:14:08,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:08,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:08,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:08,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:08,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:08,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:08,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134920131] [2020-10-15 16:14:08,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:08,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:08,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:08,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:08,874 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-15 16:14:09,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:09,079 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-15 16:14:09,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:09,079 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:09,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:09,081 INFO L225 Difference]: With dead ends: 179 [2020-10-15 16:14:09,081 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 16:14:09,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:09,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 16:14:09,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-15 16:14:09,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-15 16:14:09,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-15 16:14:09,084 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-15 16:14:09,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:09,084 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-15 16:14:09,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:09,084 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-15 16:14:09,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:09,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:09,085 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:09,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:09,288 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:09,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:09,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-10-15 16:14:09,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:09,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114995958] [2020-10-15 16:14:09,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:09,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114995958] [2020-10-15 16:14:09,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351080366] [2020-10-15 16:14:09,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:09,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:09,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:09,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:09,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:09,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:09,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:09,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878494233] [2020-10-15 16:14:09,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:09,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:09,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:09,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:09,539 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-15 16:14:09,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:09,706 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-15 16:14:09,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:14:09,706 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:09,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:09,708 INFO L225 Difference]: With dead ends: 176 [2020-10-15 16:14:09,708 INFO L226 Difference]: Without dead ends: 174 [2020-10-15 16:14:09,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:14:09,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-15 16:14:09,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-15 16:14:09,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:14:09,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-15 16:14:09,711 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-15 16:14:09,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:09,711 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-15 16:14:09,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:09,711 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-15 16:14:09,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:09,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:09,712 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:09,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:09,912 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:09,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:09,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-10-15 16:14:09,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:09,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229239335] [2020-10-15 16:14:09,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:09,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229239335] [2020-10-15 16:14:09,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929967125] [2020-10-15 16:14:09,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:10,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:14:10,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:10,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:10,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:10,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:10,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:10,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060963914] [2020-10-15 16:14:10,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:10,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:10,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:10,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:10,163 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-15 16:14:10,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:10,374 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-15 16:14:10,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:10,374 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:10,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:10,375 INFO L225 Difference]: With dead ends: 185 [2020-10-15 16:14:10,376 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 16:14:10,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:10,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 16:14:10,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-15 16:14:10,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:14:10,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-15 16:14:10,380 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-15 16:14:10,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:10,380 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-15 16:14:10,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:10,380 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-15 16:14:10,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:10,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:10,381 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:10,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:10,590 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:10,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:10,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-10-15 16:14:10,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:10,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393066313] [2020-10-15 16:14:10,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:10,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:10,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393066313] [2020-10-15 16:14:10,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649440975] [2020-10-15 16:14:10,716 INFO L93 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:10,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:10,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:10,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:10,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:10,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:10,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:10,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386066502] [2020-10-15 16:14:10,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:10,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:10,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:10,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:10,913 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-15 16:14:11,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:11,105 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-15 16:14:11,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:11,106 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:11,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:11,107 INFO L225 Difference]: With dead ends: 185 [2020-10-15 16:14:11,107 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 16:14:11,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:11,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 16:14:11,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-15 16:14:11,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-15 16:14:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-15 16:14:11,111 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-15 16:14:11,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:11,112 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-15 16:14:11,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:11,112 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-15 16:14:11,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:11,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:11,113 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:11,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:11,321 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:11,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:11,322 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-10-15 16:14:11,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:11,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287121856] [2020-10-15 16:14:11,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:11,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287121856] [2020-10-15 16:14:11,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929748165] [2020-10-15 16:14:11,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:11,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:11,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:11,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:11,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:11,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:11,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:11,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215293404] [2020-10-15 16:14:11,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:11,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:11,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:11,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:11,595 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-15 16:14:11,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:11,657 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-15 16:14:11,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:14:11,657 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:11,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:11,659 INFO L225 Difference]: With dead ends: 182 [2020-10-15 16:14:11,659 INFO L226 Difference]: Without dead ends: 180 [2020-10-15 16:14:11,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:14:11,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-15 16:14:11,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-15 16:14:11,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:14:11,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-15 16:14:11,662 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-15 16:14:11,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:11,663 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-15 16:14:11,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:11,663 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-15 16:14:11,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:11,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:11,664 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:11,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-15 16:14:11,869 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:11,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:11,869 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-10-15 16:14:11,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:11,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114232145] [2020-10-15 16:14:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:11,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114232145] [2020-10-15 16:14:11,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773327746] [2020-10-15 16:14:11,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:12,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:12,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:12,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:12,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:12,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:12,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:12,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879944398] [2020-10-15 16:14:12,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:12,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:12,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:12,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:12,137 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-15 16:14:12,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:12,311 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-15 16:14:12,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:14:12,312 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:12,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:12,314 INFO L225 Difference]: With dead ends: 185 [2020-10-15 16:14:12,314 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 16:14:12,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:14:12,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 16:14:12,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-15 16:14:12,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:12,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-15 16:14:12,317 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-15 16:14:12,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:12,318 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-15 16:14:12,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:12,318 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-15 16:14:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:12,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:12,318 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:12,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:12,519 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:12,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:12,520 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-10-15 16:14:12,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:12,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340717293] [2020-10-15 16:14:12,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:12,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340717293] [2020-10-15 16:14:12,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47453277] [2020-10-15 16:14:12,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:12,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:12,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:12,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:12,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:12,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246873541] [2020-10-15 16:14:12,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:12,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:12,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:12,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:12,811 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:13,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:13,037 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-15 16:14:13,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:14:13,037 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:13,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:13,039 INFO L225 Difference]: With dead ends: 191 [2020-10-15 16:14:13,039 INFO L226 Difference]: Without dead ends: 189 [2020-10-15 16:14:13,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:13,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-15 16:14:13,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-15 16:14:13,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:14:13,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-15 16:14:13,042 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-15 16:14:13,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:13,042 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-15 16:14:13,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:13,043 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-15 16:14:13,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:13,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:13,043 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:13,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:13,244 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:13,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:13,244 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-10-15 16:14:13,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:13,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349076675] [2020-10-15 16:14:13,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:13,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349076675] [2020-10-15 16:14:13,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881018989] [2020-10-15 16:14:13,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:13,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:13,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:13,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:13,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:13,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:13,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:13,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313747276] [2020-10-15 16:14:13,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:13,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:13,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:13,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:13,480 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-15 16:14:13,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:13,710 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-15 16:14:13,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:13,716 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:13,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:13,718 INFO L225 Difference]: With dead ends: 187 [2020-10-15 16:14:13,718 INFO L226 Difference]: Without dead ends: 185 [2020-10-15 16:14:13,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:13,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-15 16:14:13,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-15 16:14:13,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:13,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-15 16:14:13,721 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-15 16:14:13,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:13,721 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-15 16:14:13,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:13,722 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-15 16:14:13,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:13,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:13,722 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:13,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-15 16:14:13,933 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:13,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:13,933 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-10-15 16:14:13,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:13,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299171372] [2020-10-15 16:14:13,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:14,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:14,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299171372] [2020-10-15 16:14:14,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850396576] [2020-10-15 16:14:14,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:14,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:14,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:14,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:14,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:14,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:14,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:14,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531767284] [2020-10-15 16:14:14,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:14,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:14,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:14,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:14,157 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:14,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:14,403 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-15 16:14:14,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:14,403 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:14,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:14,405 INFO L225 Difference]: With dead ends: 198 [2020-10-15 16:14:14,405 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 16:14:14,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:14,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 16:14:14,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-15 16:14:14,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:14,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-15 16:14:14,408 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-15 16:14:14,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:14,409 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-15 16:14:14,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:14,409 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-15 16:14:14,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:14,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:14,409 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:14,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:14,610 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:14,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:14,611 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-10-15 16:14:14,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:14,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362887477] [2020-10-15 16:14:14,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:14,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:14,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362887477] [2020-10-15 16:14:14,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818133316] [2020-10-15 16:14:14,692 INFO L93 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:14,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:14,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:14,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:14,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:14,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:14,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:14,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322059945] [2020-10-15 16:14:14,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:14,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:14,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:14,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:14,870 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-15 16:14:15,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:15,143 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-15 16:14:15,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:15,143 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:15,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:15,145 INFO L225 Difference]: With dead ends: 189 [2020-10-15 16:14:15,145 INFO L226 Difference]: Without dead ends: 187 [2020-10-15 16:14:15,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:15,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-15 16:14:15,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-15 16:14:15,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:14:15,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-15 16:14:15,149 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-15 16:14:15,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:15,150 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-15 16:14:15,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:15,150 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-15 16:14:15,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:15,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:15,150 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:15,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-15 16:14:15,362 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:15,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:15,362 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-10-15 16:14:15,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:15,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522396647] [2020-10-15 16:14:15,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:15,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522396647] [2020-10-15 16:14:15,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469024977] [2020-10-15 16:14:15,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:15,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:15,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:15,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:15,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:15,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:15,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:15,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729592976] [2020-10-15 16:14:15,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:15,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:15,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:15,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:15,612 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-15 16:14:15,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:15,701 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-15 16:14:15,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:14:15,702 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:15,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:15,703 INFO L225 Difference]: With dead ends: 178 [2020-10-15 16:14:15,703 INFO L226 Difference]: Without dead ends: 176 [2020-10-15 16:14:15,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:14:15,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-15 16:14:15,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-15 16:14:15,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:15,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-15 16:14:15,707 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-15 16:14:15,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:15,707 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-15 16:14:15,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:15,707 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-15 16:14:15,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:15,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:15,708 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:15,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:15,908 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:15,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:15,909 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-10-15 16:14:15,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:15,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999700201] [2020-10-15 16:14:15,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:15,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999700201] [2020-10-15 16:14:15,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499122163] [2020-10-15 16:14:15,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:16,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:16,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:16,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:16,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:16,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:16,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:16,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705183866] [2020-10-15 16:14:16,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:16,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:16,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:16,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:16,149 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-15 16:14:16,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:16,336 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-15 16:14:16,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:16,337 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:16,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:16,338 INFO L225 Difference]: With dead ends: 193 [2020-10-15 16:14:16,338 INFO L226 Difference]: Without dead ends: 191 [2020-10-15 16:14:16,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:16,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-15 16:14:16,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-15 16:14:16,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:14:16,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-15 16:14:16,342 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-15 16:14:16,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:16,342 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-15 16:14:16,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:16,342 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-15 16:14:16,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:16,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:16,342 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:16,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-15 16:14:16,543 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:16,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:16,544 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-10-15 16:14:16,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:16,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827882647] [2020-10-15 16:14:16,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:16,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827882647] [2020-10-15 16:14:16,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215969152] [2020-10-15 16:14:16,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:16,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:16,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:16,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:16,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:16,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234242697] [2020-10-15 16:14:16,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:16,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:16,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:16,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:16,810 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-15 16:14:17,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:17,068 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-15 16:14:17,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:17,069 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:17,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:17,070 INFO L225 Difference]: With dead ends: 195 [2020-10-15 16:14:17,071 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 16:14:17,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:14:17,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 16:14:17,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-15 16:14:17,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:14:17,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-15 16:14:17,075 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-15 16:14:17,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:17,076 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-15 16:14:17,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:17,076 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-15 16:14:17,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:17,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:17,076 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:17,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:17,277 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:17,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:17,278 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-10-15 16:14:17,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:17,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628856834] [2020-10-15 16:14:17,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:17,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628856834] [2020-10-15 16:14:17,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911809371] [2020-10-15 16:14:17,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:17,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:17,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:17,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:17,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:17,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:17,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:17,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921316036] [2020-10-15 16:14:17,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:17,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:17,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:17,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:17,537 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-15 16:14:17,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:17,653 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-15 16:14:17,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:14:17,654 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:17,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:17,655 INFO L225 Difference]: With dead ends: 174 [2020-10-15 16:14:17,655 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 16:14:17,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:14:17,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 16:14:17,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-15 16:14:17,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:17,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-15 16:14:17,658 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-15 16:14:17,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:17,659 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-15 16:14:17,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:17,659 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-15 16:14:17,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:17,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:17,660 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:17,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-15 16:14:17,860 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:17,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:17,861 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-10-15 16:14:17,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:17,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80909044] [2020-10-15 16:14:17,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:17,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80909044] [2020-10-15 16:14:17,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40095137] [2020-10-15 16:14:17,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:17,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:17,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:17,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:17,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:18,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:18,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:18,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455592479] [2020-10-15 16:14:18,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:18,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:18,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:18,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:18,100 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-15 16:14:18,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:18,330 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-15 16:14:18,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:18,330 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:18,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:18,332 INFO L225 Difference]: With dead ends: 189 [2020-10-15 16:14:18,332 INFO L226 Difference]: Without dead ends: 187 [2020-10-15 16:14:18,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:14:18,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-15 16:14:18,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-15 16:14:18,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:14:18,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-15 16:14:18,335 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-15 16:14:18,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:18,335 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-15 16:14:18,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:18,335 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-15 16:14:18,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:18,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:18,336 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:18,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:18,536 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:18,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:18,537 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-10-15 16:14:18,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:18,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940326010] [2020-10-15 16:14:18,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:18,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:18,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940326010] [2020-10-15 16:14:18,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515406778] [2020-10-15 16:14:18,613 INFO L93 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:18,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:18,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:18,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:18,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:18,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:18,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:18,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298431918] [2020-10-15 16:14:18,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:18,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:18,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:18,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:18,774 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-15 16:14:18,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:18,903 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-15 16:14:18,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:18,903 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:18,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:18,905 INFO L225 Difference]: With dead ends: 175 [2020-10-15 16:14:18,905 INFO L226 Difference]: Without dead ends: 173 [2020-10-15 16:14:18,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:14:18,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-15 16:14:18,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-15 16:14:18,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:18,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 16:14:18,909 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 16:14:18,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:18,909 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 16:14:18,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:18,910 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 16:14:18,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:18,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:18,910 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:19,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:19,122 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:19,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:19,122 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-10-15 16:14:19,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:19,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619546459] [2020-10-15 16:14:19,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:19,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619546459] [2020-10-15 16:14:19,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378675911] [2020-10-15 16:14:19,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:19,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:19,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:19,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:19,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:19,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:19,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:19,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:19,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823433583] [2020-10-15 16:14:19,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:19,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:19,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:19,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:19,372 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:19,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:19,682 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-15 16:14:19,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:19,682 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:19,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:19,684 INFO L225 Difference]: With dead ends: 195 [2020-10-15 16:14:19,684 INFO L226 Difference]: Without dead ends: 190 [2020-10-15 16:14:19,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:14:19,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-15 16:14:19,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-15 16:14:19,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:19,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-15 16:14:19,687 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-15 16:14:19,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:19,688 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-15 16:14:19,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:19,688 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-15 16:14:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:19,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:19,688 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:19,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:19,890 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:19,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:19,891 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-10-15 16:14:19,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:19,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325031715] [2020-10-15 16:14:19,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:19,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325031715] [2020-10-15 16:14:19,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609079539] [2020-10-15 16:14:19,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:20,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:20,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:20,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:20,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:20,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:20,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:20,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:20,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797370142] [2020-10-15 16:14:20,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:20,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:20,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:20,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:20,138 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-15 16:14:20,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:20,397 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-15 16:14:20,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:14:20,398 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:20,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:20,399 INFO L225 Difference]: With dead ends: 187 [2020-10-15 16:14:20,399 INFO L226 Difference]: Without dead ends: 185 [2020-10-15 16:14:20,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:20,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-15 16:14:20,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-15 16:14:20,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:20,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 16:14:20,403 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 16:14:20,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:20,403 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 16:14:20,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:20,403 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 16:14:20,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:20,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:20,403 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:20,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:20,604 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:20,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:20,605 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-10-15 16:14:20,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:20,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958609206] [2020-10-15 16:14:20,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:20,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958609206] [2020-10-15 16:14:20,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691043465] [2020-10-15 16:14:20,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:20,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:20,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:20,813 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:20,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:20,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:20,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062984350] [2020-10-15 16:14:20,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:20,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:20,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:20,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:20,840 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:21,272 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-15 16:14:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:14:21,272 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:21,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:21,274 INFO L225 Difference]: With dead ends: 212 [2020-10-15 16:14:21,274 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 16:14:21,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:14:21,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 16:14:21,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-15 16:14:21,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:21,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 16:14:21,278 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 16:14:21,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:21,278 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 16:14:21,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:21,278 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 16:14:21,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:21,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:21,279 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:21,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-15 16:14:21,479 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:21,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:21,480 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-10-15 16:14:21,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:21,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603365124] [2020-10-15 16:14:21,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:21,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603365124] [2020-10-15 16:14:21,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411904364] [2020-10-15 16:14:21,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:21,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:21,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:21,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:21,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:21,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:21,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:21,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:21,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822594566] [2020-10-15 16:14:21,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:21,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:21,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:21,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:21,718 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:22,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:22,031 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-15 16:14:22,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:22,032 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:22,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:22,033 INFO L225 Difference]: With dead ends: 202 [2020-10-15 16:14:22,033 INFO L226 Difference]: Without dead ends: 197 [2020-10-15 16:14:22,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:14:22,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-15 16:14:22,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-15 16:14:22,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:14:22,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-15 16:14:22,036 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-15 16:14:22,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:22,037 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-15 16:14:22,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:22,037 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-15 16:14:22,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:22,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:22,037 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:22,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:22,238 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:22,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:22,239 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-10-15 16:14:22,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:22,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928895783] [2020-10-15 16:14:22,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:22,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928895783] [2020-10-15 16:14:22,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219554129] [2020-10-15 16:14:22,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:22,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:22,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:22,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:22,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:22,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:22,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:22,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982853228] [2020-10-15 16:14:22,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:22,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:22,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:22,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:22,992 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-15 16:14:23,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:23,269 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-15 16:14:23,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:23,270 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:23,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:23,272 INFO L225 Difference]: With dead ends: 198 [2020-10-15 16:14:23,272 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 16:14:23,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:23,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 16:14:23,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-15 16:14:23,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:23,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-15 16:14:23,276 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-15 16:14:23,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:23,277 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-15 16:14:23,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:23,277 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-15 16:14:23,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:23,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:23,278 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:23,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-15 16:14:23,485 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:23,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:23,485 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-10-15 16:14:23,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:23,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404482921] [2020-10-15 16:14:23,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:23,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404482921] [2020-10-15 16:14:23,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660322498] [2020-10-15 16:14:23,547 INFO L93 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:23,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:23,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:23,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:23,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:23,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:23,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:23,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587936121] [2020-10-15 16:14:23,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:23,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:23,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:23,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:23,739 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-15 16:14:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:24,133 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-15 16:14:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:14:24,133 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:24,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:24,135 INFO L225 Difference]: With dead ends: 209 [2020-10-15 16:14:24,135 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 16:14:24,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:14:24,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 16:14:24,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-15 16:14:24,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:24,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 16:14:24,140 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 16:14:24,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:24,140 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 16:14:24,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 16:14:24,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:24,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:24,141 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:24,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-15 16:14:24,342 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:24,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:24,342 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-10-15 16:14:24,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:24,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984956169] [2020-10-15 16:14:24,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:24,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984956169] [2020-10-15 16:14:24,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495064011] [2020-10-15 16:14:24,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:24,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:24,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:24,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:24,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:24,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:24,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:24,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:24,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227082096] [2020-10-15 16:14:24,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:24,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:24,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:24,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:24,597 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:25,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:25,129 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-15 16:14:25,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:14:25,129 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:25,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:25,131 INFO L225 Difference]: With dead ends: 217 [2020-10-15 16:14:25,131 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 16:14:25,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:14:25,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 16:14:25,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-15 16:14:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 16:14:25,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-15 16:14:25,136 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-15 16:14:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:25,136 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-15 16:14:25,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:25,136 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-15 16:14:25,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:25,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:25,137 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:25,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-15 16:14:25,343 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:25,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:25,343 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-10-15 16:14:25,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:25,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969129805] [2020-10-15 16:14:25,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:25,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:25,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969129805] [2020-10-15 16:14:25,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912850897] [2020-10-15 16:14:25,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:25,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:25,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:25,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:25,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:27,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:27,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:27,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:27,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600367379] [2020-10-15 16:14:27,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:27,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:27,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:27,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-15 16:14:27,666 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-15 16:14:31,971 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 16:14:36,219 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-15 16:14:36,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:36,692 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-15 16:14:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:14:36,693 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:36,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:36,693 INFO L225 Difference]: With dead ends: 236 [2020-10-15 16:14:36,694 INFO L226 Difference]: Without dead ends: 228 [2020-10-15 16:14:36,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-10-15 16:14:36,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-15 16:14:36,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-15 16:14:36,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:14:36,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-15 16:14:36,697 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-15 16:14:36,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:36,697 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-15 16:14:36,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:36,698 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-15 16:14:36,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:36,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:36,698 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:36,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-15 16:14:36,899 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:36,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:36,899 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-10-15 16:14:36,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:36,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248451628] [2020-10-15 16:14:36,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:36,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:36,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248451628] [2020-10-15 16:14:36,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742188924] [2020-10-15 16:14:36,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:37,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:37,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:37,154 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:37,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:37,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:37,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:37,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:37,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198897754] [2020-10-15 16:14:37,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:37,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:37,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:37,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:37,194 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-10-15 16:14:37,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:37,738 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-10-15 16:14:37,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:14:37,739 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:37,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:37,740 INFO L225 Difference]: With dead ends: 219 [2020-10-15 16:14:37,740 INFO L226 Difference]: Without dead ends: 214 [2020-10-15 16:14:37,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:14:37,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-15 16:14:37,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-10-15 16:14:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:14:37,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-15 16:14:37,743 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-15 16:14:37,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:37,743 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-15 16:14:37,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:37,744 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-15 16:14:37,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:37,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:37,744 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:37,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:37,945 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:37,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:37,945 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-10-15 16:14:37,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:37,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824136227] [2020-10-15 16:14:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:38,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824136227] [2020-10-15 16:14:38,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30398551] [2020-10-15 16:14:38,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:38,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:38,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:38,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:38,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:38,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:38,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:38,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881050516] [2020-10-15 16:14:38,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:38,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:38,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:38,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:38,198 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-15 16:14:38,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:38,465 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-15 16:14:38,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:38,466 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:38,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:38,467 INFO L225 Difference]: With dead ends: 197 [2020-10-15 16:14:38,467 INFO L226 Difference]: Without dead ends: 195 [2020-10-15 16:14:38,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:38,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-15 16:14:38,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-15 16:14:38,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:38,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-15 16:14:38,471 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-15 16:14:38,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:38,471 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-15 16:14:38,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:38,471 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-15 16:14:38,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:38,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:38,472 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:38,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:38,675 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:38,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:38,675 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-10-15 16:14:38,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:38,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438803671] [2020-10-15 16:14:38,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:38,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438803671] [2020-10-15 16:14:38,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387835502] [2020-10-15 16:14:38,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:38,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:38,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:38,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:38,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:38,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:38,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:38,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:38,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410636412] [2020-10-15 16:14:38,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:38,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:38,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:38,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:38,919 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-15 16:14:39,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:39,198 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-15 16:14:39,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:39,198 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:39,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:39,199 INFO L225 Difference]: With dead ends: 202 [2020-10-15 16:14:39,199 INFO L226 Difference]: Without dead ends: 200 [2020-10-15 16:14:39,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:39,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-15 16:14:39,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-15 16:14:39,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:39,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-15 16:14:39,204 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-15 16:14:39,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:39,205 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-15 16:14:39,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:39,205 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-15 16:14:39,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:39,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:39,205 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:39,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-15 16:14:39,409 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:39,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:39,409 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-10-15 16:14:39,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:39,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438632275] [2020-10-15 16:14:39,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:39,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438632275] [2020-10-15 16:14:39,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847482490] [2020-10-15 16:14:39,487 INFO L93 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:39,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:39,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:39,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:39,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:39,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:39,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:39,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676041304] [2020-10-15 16:14:39,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:39,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:39,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:39,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:39,669 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-15 16:14:39,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:39,951 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-15 16:14:39,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:39,951 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:39,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:39,952 INFO L225 Difference]: With dead ends: 197 [2020-10-15 16:14:39,952 INFO L226 Difference]: Without dead ends: 195 [2020-10-15 16:14:39,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:39,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-15 16:14:39,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-15 16:14:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-15 16:14:39,955 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-15 16:14:39,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:39,955 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-15 16:14:39,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:39,955 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-15 16:14:39,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:39,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:39,956 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:40,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-15 16:14:40,156 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:40,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:40,157 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-10-15 16:14:40,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:40,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492674091] [2020-10-15 16:14:40,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:40,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492674091] [2020-10-15 16:14:40,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750897333] [2020-10-15 16:14:40,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:40,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:40,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:40,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:40,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:40,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:40,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:40,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472889763] [2020-10-15 16:14:40,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:40,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:40,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:40,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:40,471 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-15 16:14:41,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:41,071 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-15 16:14:41,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:14:41,072 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:41,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:41,073 INFO L225 Difference]: With dead ends: 214 [2020-10-15 16:14:41,073 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 16:14:41,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:14:41,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 16:14:41,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-15 16:14:41,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:14:41,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-15 16:14:41,079 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-15 16:14:41,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:41,080 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-15 16:14:41,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:41,080 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-15 16:14:41,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:41,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:41,081 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:41,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-15 16:14:41,293 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:41,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:41,294 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-10-15 16:14:41,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:41,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015057154] [2020-10-15 16:14:41,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:41,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:41,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015057154] [2020-10-15 16:14:41,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353057435] [2020-10-15 16:14:41,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:41,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:41,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:41,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:41,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:41,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:41,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:41,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:41,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281519880] [2020-10-15 16:14:41,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:41,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:41,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:41,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:41,640 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-15 16:14:42,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:42,007 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-15 16:14:42,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:14:42,007 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:42,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:42,008 INFO L225 Difference]: With dead ends: 217 [2020-10-15 16:14:42,008 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 16:14:42,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:14:42,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 16:14:42,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-15 16:14:42,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:42,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-15 16:14:42,012 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-15 16:14:42,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:42,012 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-15 16:14:42,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:42,013 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-15 16:14:42,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:42,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:42,013 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:42,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:42,223 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:42,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:42,224 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-10-15 16:14:42,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:42,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661275196] [2020-10-15 16:14:42,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:42,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:42,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661275196] [2020-10-15 16:14:42,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323743057] [2020-10-15 16:14:42,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:42,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:42,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:42,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:42,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:42,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609165699] [2020-10-15 16:14:42,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:42,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:42,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:42,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:42,474 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-15 16:14:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:42,887 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-15 16:14:42,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:14:42,888 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:42,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:42,888 INFO L225 Difference]: With dead ends: 211 [2020-10-15 16:14:42,888 INFO L226 Difference]: Without dead ends: 209 [2020-10-15 16:14:42,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:14:42,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-15 16:14:42,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-15 16:14:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 16:14:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 16:14:42,892 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 16:14:42,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:42,893 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 16:14:42,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:42,893 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 16:14:42,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:42,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:42,893 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:43,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:43,094 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:43,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:43,094 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-10-15 16:14:43,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:43,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936246392] [2020-10-15 16:14:43,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:43,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936246392] [2020-10-15 16:14:43,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765367117] [2020-10-15 16:14:43,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:43,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:43,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:43,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:43,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:43,307 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:43,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:43,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:43,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:43,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947896155] [2020-10-15 16:14:43,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:43,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:43,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:43,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:43,319 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 16:14:43,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:43,798 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-15 16:14:43,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:14:43,799 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:43,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:43,799 INFO L225 Difference]: With dead ends: 211 [2020-10-15 16:14:43,800 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 16:14:43,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:14:43,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 16:14:43,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-15 16:14:43,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 16:14:43,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 16:14:43,803 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 16:14:43,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:43,804 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 16:14:43,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:43,804 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 16:14:43,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:43,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:43,804 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:44,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-15 16:14:44,013 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:44,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:44,013 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-10-15 16:14:44,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:44,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543177285] [2020-10-15 16:14:44,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:44,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543177285] [2020-10-15 16:14:44,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263429270] [2020-10-15 16:14:44,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:44,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:44,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:44,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:44,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:44,238 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:44,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:44,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:44,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274558699] [2020-10-15 16:14:44,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:44,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:44,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:44,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:44,286 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 16:14:44,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:44,884 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-15 16:14:44,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:14:44,884 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:44,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:44,885 INFO L225 Difference]: With dead ends: 227 [2020-10-15 16:14:44,885 INFO L226 Difference]: Without dead ends: 222 [2020-10-15 16:14:44,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:14:44,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-15 16:14:44,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-15 16:14:44,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-15 16:14:44,889 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-15 16:14:44,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:44,889 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-15 16:14:44,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:44,890 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-15 16:14:44,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:44,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:44,890 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:45,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-15 16:14:45,092 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:45,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:45,093 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-10-15 16:14:45,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:45,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000051965] [2020-10-15 16:14:45,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:45,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000051965] [2020-10-15 16:14:45,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075240862] [2020-10-15 16:14:45,171 INFO L93 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:45,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:45,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:45,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:45,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:45,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:45,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:45,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967081959] [2020-10-15 16:14:45,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:45,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:45,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:45,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:45,334 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-15 16:14:45,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:45,816 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-15 16:14:45,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:14:45,817 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:45,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:45,817 INFO L225 Difference]: With dead ends: 221 [2020-10-15 16:14:45,817 INFO L226 Difference]: Without dead ends: 219 [2020-10-15 16:14:45,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:14:45,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-15 16:14:45,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-15 16:14:45,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 16:14:45,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 16:14:45,821 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 16:14:45,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:45,821 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 16:14:45,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:45,821 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 16:14:45,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:45,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:45,821 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:46,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:46,022 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:46,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:46,023 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-10-15 16:14:46,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:46,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122823464] [2020-10-15 16:14:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:46,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122823464] [2020-10-15 16:14:46,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726173528] [2020-10-15 16:14:46,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:46,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:46,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:46,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:46,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:46,263 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:46,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:46,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:46,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123766719] [2020-10-15 16:14:46,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:46,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:46,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:46,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:46,274 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 16:14:46,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:46,881 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-15 16:14:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:14:46,882 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:46,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:46,883 INFO L225 Difference]: With dead ends: 240 [2020-10-15 16:14:46,883 INFO L226 Difference]: Without dead ends: 232 [2020-10-15 16:14:46,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:14:46,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-15 16:14:46,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-15 16:14:46,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 16:14:46,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-15 16:14:46,887 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-15 16:14:46,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:46,887 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-15 16:14:46,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:46,887 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-15 16:14:46,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:46,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:46,888 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:47,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-15 16:14:47,097 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:47,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:47,097 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-10-15 16:14:47,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:47,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791783060] [2020-10-15 16:14:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:47,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791783060] [2020-10-15 16:14:47,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929712233] [2020-10-15 16:14:47,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:47,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:47,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:47,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:47,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:47,319 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:47,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:47,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:47,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518938615] [2020-10-15 16:14:47,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:47,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:47,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:47,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:47,341 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-15 16:14:47,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:47,948 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-15 16:14:47,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:14:47,949 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:47,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:47,949 INFO L225 Difference]: With dead ends: 238 [2020-10-15 16:14:47,949 INFO L226 Difference]: Without dead ends: 230 [2020-10-15 16:14:47,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:14:47,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-15 16:14:47,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-15 16:14:47,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-15 16:14:47,954 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-15 16:14:47,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:47,954 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-15 16:14:47,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:47,954 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-15 16:14:47,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:47,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:47,955 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:48,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:48,164 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:48,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:48,164 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-10-15 16:14:48,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:48,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668027241] [2020-10-15 16:14:48,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:48,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668027241] [2020-10-15 16:14:48,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286654420] [2020-10-15 16:14:48,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:48,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:48,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:48,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:48,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:48,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119776977] [2020-10-15 16:14:48,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:48,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:48,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:48,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:48,413 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-15 16:14:48,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:48,675 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-15 16:14:48,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:48,676 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:48,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:48,676 INFO L225 Difference]: With dead ends: 195 [2020-10-15 16:14:48,676 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 16:14:48,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:48,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 16:14:48,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-15 16:14:48,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:48,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-15 16:14:48,679 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-15 16:14:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:48,680 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-15 16:14:48,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:48,680 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-15 16:14:48,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:48,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:48,681 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:48,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-15 16:14:48,884 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:48,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:48,884 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-10-15 16:14:48,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:48,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177864524] [2020-10-15 16:14:48,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:48,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177864524] [2020-10-15 16:14:48,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337036877] [2020-10-15 16:14:48,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:49,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:49,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:49,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:49,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:49,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:49,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:49,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795245961] [2020-10-15 16:14:49,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:49,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:49,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:49,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:49,147 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-15 16:14:49,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:49,631 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-15 16:14:49,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:14:49,632 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:49,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:49,633 INFO L225 Difference]: With dead ends: 206 [2020-10-15 16:14:49,633 INFO L226 Difference]: Without dead ends: 204 [2020-10-15 16:14:49,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:14:49,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-15 16:14:49,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-15 16:14:49,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:49,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-15 16:14:49,637 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-15 16:14:49,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:49,637 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-15 16:14:49,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:49,638 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-15 16:14:49,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:49,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:49,638 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:49,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:49,847 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:49,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:49,847 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-10-15 16:14:49,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:49,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290689509] [2020-10-15 16:14:49,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:49,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:49,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290689509] [2020-10-15 16:14:49,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507380751] [2020-10-15 16:14:49,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:49,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:14:49,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:49,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:49,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:50,092 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:51,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:51,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:51,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 16:14:51,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850043583] [2020-10-15 16:14:51,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:14:51,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:51,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:14:51,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-15 16:14:51,297 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-10-15 16:14:53,710 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-15 16:15:13,805 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-15 16:15:41,741 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-15 16:16:05,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:05,616 INFO L93 Difference]: Finished difference Result 252 states and 593 transitions. [2020-10-15 16:16:05,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:16:05,616 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-15 16:16:05,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:05,617 INFO L225 Difference]: With dead ends: 252 [2020-10-15 16:16:05,617 INFO L226 Difference]: Without dead ends: 247 [2020-10-15 16:16:05,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-10-15 16:16:05,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-15 16:16:05,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 139. [2020-10-15 16:16:05,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:16:05,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-15 16:16:05,622 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-15 16:16:05,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:05,622 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-15 16:16:05,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:16:05,622 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-15 16:16:05,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:05,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:05,623 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:05,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-15 16:16:05,824 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:05,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:05,824 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-10-15 16:16:05,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:05,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156077368] [2020-10-15 16:16:05,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:05,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:05,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156077368] [2020-10-15 16:16:05,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888549948] [2020-10-15 16:16:05,913 INFO L93 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:05,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:16:05,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:05,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:05,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:06,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:06,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:06,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829939104] [2020-10-15 16:16:06,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:06,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:06,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:06,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:06,082 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-15 16:16:06,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:06,308 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-15 16:16:06,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:16:06,309 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:06,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:06,309 INFO L225 Difference]: With dead ends: 194 [2020-10-15 16:16:06,309 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 16:16:06,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:16:06,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 16:16:06,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-15 16:16:06,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:16:06,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-15 16:16:06,312 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-15 16:16:06,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:06,312 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-15 16:16:06,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:06,313 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-15 16:16:06,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:06,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:06,313 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:06,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:06,514 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:06,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:06,514 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-10-15 16:16:06,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:06,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144513391] [2020-10-15 16:16:06,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:06,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:06,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144513391] [2020-10-15 16:16:06,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928868641] [2020-10-15 16:16:06,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:06,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:16:06,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:06,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:06,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:06,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:06,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:06,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128736573] [2020-10-15 16:16:06,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:06,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:06,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:06,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:06,778 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-15 16:16:07,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:07,103 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-15 16:16:07,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:16:07,104 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:07,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:07,105 INFO L225 Difference]: With dead ends: 205 [2020-10-15 16:16:07,105 INFO L226 Difference]: Without dead ends: 203 [2020-10-15 16:16:07,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:16:07,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-15 16:16:07,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-15 16:16:07,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:16:07,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-15 16:16:07,108 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-15 16:16:07,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:07,109 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-15 16:16:07,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:07,109 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-15 16:16:07,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:07,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:07,109 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:07,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:07,317 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:07,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:07,317 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-10-15 16:16:07,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:07,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117496692] [2020-10-15 16:16:07,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:07,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117496692] [2020-10-15 16:16:07,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085327498] [2020-10-15 16:16:07,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:07,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:16:07,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:07,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:07,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:07,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:07,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:07,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802741652] [2020-10-15 16:16:07,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:07,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:07,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:07,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:07,596 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-15 16:16:07,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:07,879 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-15 16:16:07,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:16:07,880 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:07,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:07,881 INFO L225 Difference]: With dead ends: 201 [2020-10-15 16:16:07,881 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 16:16:07,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:16:07,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 16:16:07,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-15 16:16:07,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 16:16:07,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-15 16:16:07,885 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-15 16:16:07,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:07,885 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-15 16:16:07,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:07,885 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-15 16:16:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:07,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:07,886 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:08,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:08,086 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:08,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:08,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-10-15 16:16:08,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:08,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983208356] [2020-10-15 16:16:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:08,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983208356] [2020-10-15 16:16:08,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475794108] [2020-10-15 16:16:08,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:08,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:08,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:08,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:08,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:08,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170228016] [2020-10-15 16:16:08,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:08,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:08,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:08,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:08,406 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-15 16:16:08,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:08,707 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-15 16:16:08,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:16:08,707 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:08,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:08,708 INFO L225 Difference]: With dead ends: 194 [2020-10-15 16:16:08,708 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 16:16:08,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:16:08,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 16:16:08,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-15 16:16:08,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:16:08,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-15 16:16:08,711 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-15 16:16:08,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:08,711 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-15 16:16:08,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:08,712 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-15 16:16:08,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:08,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:08,712 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:08,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-15 16:16:08,921 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:08,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:08,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-10-15 16:16:08,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:08,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320202761] [2020-10-15 16:16:08,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:09,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320202761] [2020-10-15 16:16:09,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780149625] [2020-10-15 16:16:09,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:09,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:16:09,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:09,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:09,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:09,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:09,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:09,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196118650] [2020-10-15 16:16:09,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:09,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:09,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:09,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:09,196 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-15 16:16:09,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:09,549 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-15 16:16:09,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:16:09,549 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:09,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:09,550 INFO L225 Difference]: With dead ends: 209 [2020-10-15 16:16:09,550 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 16:16:09,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:16:09,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 16:16:09,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-15 16:16:09,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:16:09,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-15 16:16:09,554 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-15 16:16:09,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:09,555 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-15 16:16:09,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:09,555 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-15 16:16:09,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:09,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:09,555 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:09,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:09,761 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:09,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:09,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-10-15 16:16:09,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:09,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434977896] [2020-10-15 16:16:09,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:09,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434977896] [2020-10-15 16:16:09,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301522143] [2020-10-15 16:16:09,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:09,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:16:09,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:09,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:09,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:10,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:10,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:10,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597907504] [2020-10-15 16:16:10,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:10,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:10,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:10,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:10,029 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-15 16:16:10,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:10,364 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-15 16:16:10,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:16:10,365 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:10,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:10,365 INFO L225 Difference]: With dead ends: 202 [2020-10-15 16:16:10,365 INFO L226 Difference]: Without dead ends: 200 [2020-10-15 16:16:10,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:16:10,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-15 16:16:10,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-15 16:16:10,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:16:10,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-15 16:16:10,368 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-15 16:16:10,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:10,368 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-15 16:16:10,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:10,368 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-15 16:16:10,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:10,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:10,369 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:10,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-15 16:16:10,569 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:10,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:10,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-10-15 16:16:10,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:10,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022129025] [2020-10-15 16:16:10,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:10,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022129025] [2020-10-15 16:16:10,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619710578] [2020-10-15 16:16:10,649 INFO L93 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:10,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:16:10,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:10,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:10,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:10,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:10,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:10,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:10,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152679803] [2020-10-15 16:16:10,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:10,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:10,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:10,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:10,832 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-15 16:16:11,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:11,156 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-15 16:16:11,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:16:11,157 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:11,158 INFO L225 Difference]: With dead ends: 201 [2020-10-15 16:16:11,158 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 16:16:11,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:16:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 16:16:11,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-15 16:16:11,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:16:11,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-15 16:16:11,161 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-15 16:16:11,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:11,162 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-15 16:16:11,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:11,162 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-15 16:16:11,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:11,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:11,162 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:11,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-15 16:16:11,363 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:11,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:11,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-10-15 16:16:11,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:11,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816786030] [2020-10-15 16:16:11,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:11,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816786030] [2020-10-15 16:16:11,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476114546] [2020-10-15 16:16:11,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:11,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:16:11,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:11,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:11,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:11,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:11,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:11,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423399557] [2020-10-15 16:16:11,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:11,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:11,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:11,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:11,638 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-15 16:16:12,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:12,087 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-15 16:16:12,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:16:12,088 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:12,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:12,089 INFO L225 Difference]: With dead ends: 215 [2020-10-15 16:16:12,089 INFO L226 Difference]: Without dead ends: 213 [2020-10-15 16:16:12,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:16:12,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-15 16:16:12,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-15 16:16:12,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:16:12,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-15 16:16:12,092 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-15 16:16:12,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:12,092 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-15 16:16:12,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:12,092 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-15 16:16:12,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:12,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:12,093 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:12,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:12,296 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:12,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:12,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-10-15 16:16:12,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:12,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879389876] [2020-10-15 16:16:12,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:12,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879389876] [2020-10-15 16:16:12,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755528754] [2020-10-15 16:16:12,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:12,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:16:12,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:12,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:12,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:12,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:12,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:12,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:12,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503497428] [2020-10-15 16:16:12,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:12,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:12,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:12,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:12,552 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-15 16:16:12,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:12,935 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-15 16:16:12,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:16:12,935 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:12,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:12,936 INFO L225 Difference]: With dead ends: 196 [2020-10-15 16:16:12,936 INFO L226 Difference]: Without dead ends: 194 [2020-10-15 16:16:12,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:16:12,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-15 16:16:12,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-15 16:16:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:16:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 16:16:12,941 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 16:16:12,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:12,941 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 16:16:12,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:12,941 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 16:16:12,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:12,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:12,942 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:13,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:13,144 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:13,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:13,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-10-15 16:16:13,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:13,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004122984] [2020-10-15 16:16:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:13,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004122984] [2020-10-15 16:16:13,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660731558] [2020-10-15 16:16:13,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:13,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:13,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:13,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:16:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:13,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:13,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:13,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364309265] [2020-10-15 16:16:13,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:13,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:13,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:13,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:13,379 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 16:16:13,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:13,688 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-15 16:16:13,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:16:13,689 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:13,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:13,690 INFO L225 Difference]: With dead ends: 191 [2020-10-15 16:16:13,690 INFO L226 Difference]: Without dead ends: 186 [2020-10-15 16:16:13,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:16:13,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-15 16:16:13,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-15 16:16:13,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:16:13,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 16:16:13,694 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 16:16:13,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:13,694 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 16:16:13,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:13,695 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 16:16:13,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:13,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:13,695 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:13,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-15 16:16:13,898 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:13,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:13,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-10-15 16:16:13,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:13,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004304078] [2020-10-15 16:16:13,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:13,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004304078] [2020-10-15 16:16:13,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463228057] [2020-10-15 16:16:13,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:14,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:16:14,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:14,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:14,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:14,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:16:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:14,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:14,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:14,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95283500] [2020-10-15 16:16:14,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:14,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:14,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:14,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:14,175 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 16:16:14,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:14,731 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-15 16:16:14,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:16:14,731 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:14,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:14,732 INFO L225 Difference]: With dead ends: 232 [2020-10-15 16:16:14,732 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:16:14,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:16:14,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:16:14,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-15 16:16:14,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:16:14,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-15 16:16:14,736 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-15 16:16:14,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:14,736 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-15 16:16:14,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:14,737 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-15 16:16:14,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:14,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:14,737 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:14,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:14,947 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:14,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:14,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-10-15 16:16:14,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:14,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273850011] [2020-10-15 16:16:14,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:15,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273850011] [2020-10-15 16:16:15,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683991185] [2020-10-15 16:16:15,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:15,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:16:15,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:15,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:15,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:15,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:15,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:15,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077688313] [2020-10-15 16:16:15,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:15,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:15,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:15,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:15,222 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-15 16:16:15,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:15,797 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-10-15 16:16:15,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:16:15,798 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:15,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:15,799 INFO L225 Difference]: With dead ends: 222 [2020-10-15 16:16:15,799 INFO L226 Difference]: Without dead ends: 220 [2020-10-15 16:16:15,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:16:15,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-15 16:16:15,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-10-15 16:16:15,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:16:15,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 16:16:15,802 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 16:16:15,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:15,802 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 16:16:15,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:15,802 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 16:16:15,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:15,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:15,803 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:16,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:16,004 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:16,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:16,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-10-15 16:16:16,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:16,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907492274] [2020-10-15 16:16:16,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:16,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907492274] [2020-10-15 16:16:16,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310981173] [2020-10-15 16:16:16,085 INFO L93 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:16,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:16:16,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:16,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:16,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:16,248 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:16:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:16,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:16,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:16,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662468324] [2020-10-15 16:16:16,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:16,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:16,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:16,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:16,280 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 16:16:17,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:17,050 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-15 16:16:17,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:16:17,051 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:17,052 INFO L225 Difference]: With dead ends: 254 [2020-10-15 16:16:17,052 INFO L226 Difference]: Without dead ends: 246 [2020-10-15 16:16:17,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:16:17,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-15 16:16:17,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-15 16:16:17,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 16:16:17,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-15 16:16:17,056 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-15 16:16:17,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:17,056 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-15 16:16:17,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:17,056 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-15 16:16:17,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:17,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:17,057 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:17,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:17,267 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:17,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:17,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-10-15 16:16:17,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:17,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766321778] [2020-10-15 16:16:17,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:17,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766321778] [2020-10-15 16:16:17,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381243129] [2020-10-15 16:16:17,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:17,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:16:17,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:17,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:17,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:17,511 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:16:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:17,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:17,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:17,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485072861] [2020-10-15 16:16:17,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:17,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:17,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:17,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:17,536 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-15 16:16:18,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:18,327 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-15 16:16:18,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:16:18,328 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:18,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:18,329 INFO L225 Difference]: With dead ends: 246 [2020-10-15 16:16:18,330 INFO L226 Difference]: Without dead ends: 238 [2020-10-15 16:16:18,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:16:18,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-15 16:16:18,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-15 16:16:18,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:16:18,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-15 16:16:18,334 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-15 16:16:18,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:18,334 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-15 16:16:18,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:18,335 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-15 16:16:18,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:18,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:18,335 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:18,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-15 16:16:18,545 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:18,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:18,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-10-15 16:16:18,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:18,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861942800] [2020-10-15 16:16:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:18,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861942800] [2020-10-15 16:16:18,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55278197] [2020-10-15 16:16:18,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:18,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:16:18,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:18,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:18,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:18,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:18,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:18,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820784274] [2020-10-15 16:16:18,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:18,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:18,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:18,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:18,806 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-15 16:16:19,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:19,221 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-15 16:16:19,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:16:19,222 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:19,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:19,222 INFO L225 Difference]: With dead ends: 208 [2020-10-15 16:16:19,222 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 16:16:19,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:16:19,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 16:16:19,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-15 16:16:19,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 16:16:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-15 16:16:19,226 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-15 16:16:19,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:19,226 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-15 16:16:19,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:19,226 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-15 16:16:19,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:19,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:19,226 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:19,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-15 16:16:19,427 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:19,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:19,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-10-15 16:16:19,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:19,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462546689] [2020-10-15 16:16:19,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:19,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462546689] [2020-10-15 16:16:19,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988133863] [2020-10-15 16:16:19,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:19,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:19,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:19,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:19,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:19,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606781283] [2020-10-15 16:16:19,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:19,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:19,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:19,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:19,675 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-15 16:16:20,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:20,229 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-15 16:16:20,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:16:20,229 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:20,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:20,230 INFO L225 Difference]: With dead ends: 215 [2020-10-15 16:16:20,230 INFO L226 Difference]: Without dead ends: 213 [2020-10-15 16:16:20,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:16:20,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-15 16:16:20,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-15 16:16:20,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 16:16:20,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-15 16:16:20,234 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-15 16:16:20,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:20,234 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-15 16:16:20,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:20,235 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-15 16:16:20,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:20,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:20,235 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:20,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-15 16:16:20,437 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:20,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:20,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-10-15 16:16:20,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:20,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892913976] [2020-10-15 16:16:20,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:20,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892913976] [2020-10-15 16:16:20,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44155839] [2020-10-15 16:16:20,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:20,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:16:20,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:20,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:20,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:20,667 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:16:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:20,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:20,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:20,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514390815] [2020-10-15 16:16:20,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:20,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:20,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:20,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:20,680 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-15 16:16:21,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:21,269 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-15 16:16:21,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:16:21,270 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:21,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:21,271 INFO L225 Difference]: With dead ends: 236 [2020-10-15 16:16:21,271 INFO L226 Difference]: Without dead ends: 228 [2020-10-15 16:16:21,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:16:21,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-15 16:16:21,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-15 16:16:21,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 16:16:21,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-15 16:16:21,275 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-15 16:16:21,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:21,275 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-15 16:16:21,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:21,275 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-15 16:16:21,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:21,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:21,275 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:21,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-15 16:16:21,476 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:21,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:21,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-10-15 16:16:21,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:21,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922589910] [2020-10-15 16:16:21,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:21,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922589910] [2020-10-15 16:16:21,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202731420] [2020-10-15 16:16:21,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:21,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:16:21,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:21,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:21,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:21,718 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:16:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:21,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:21,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:21,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61506339] [2020-10-15 16:16:21,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:21,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:21,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:21,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:21,730 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-15 16:16:22,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:22,385 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-15 16:16:22,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:16:22,386 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:22,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:22,387 INFO L225 Difference]: With dead ends: 241 [2020-10-15 16:16:22,387 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:16:22,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:16:22,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:16:22,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-15 16:16:22,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-15 16:16:22,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-15 16:16:22,390 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-15 16:16:22,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:22,390 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-15 16:16:22,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:22,390 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-15 16:16:22,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:22,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:22,391 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:22,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-15 16:16:22,591 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:22,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:22,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-10-15 16:16:22,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:22,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233753962] [2020-10-15 16:16:22,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:22,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233753962] [2020-10-15 16:16:22,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584891794] [2020-10-15 16:16:22,687 INFO L93 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:22,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:16:22,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:22,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:22,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:22,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:16:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:22,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:22,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:22,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501098910] [2020-10-15 16:16:22,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:22,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:22,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:22,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:22,855 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-15 16:16:23,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:23,475 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-15 16:16:23,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:16:23,475 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:23,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:23,476 INFO L225 Difference]: With dead ends: 232 [2020-10-15 16:16:23,476 INFO L226 Difference]: Without dead ends: 224 [2020-10-15 16:16:23,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:16:23,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-15 16:16:23,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-15 16:16:23,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-15 16:16:23,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-15 16:16:23,480 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-15 16:16:23,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:23,480 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-15 16:16:23,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:23,480 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-15 16:16:23,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:23,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:23,481 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:23,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:23,682 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:23,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:23,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-10-15 16:16:23,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:23,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041758495] [2020-10-15 16:16:23,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:23,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041758495] [2020-10-15 16:16:23,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110558806] [2020-10-15 16:16:23,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:23,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:16:23,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:23,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:23,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:24,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:16:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:24,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:24,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 16:16:24,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967366208] [2020-10-15 16:16:24,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:16:24,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:24,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:16:24,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:16:24,063 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-10-15 16:16:24,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:24,374 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-10-15 16:16:24,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:16:24,375 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-10-15 16:16:24,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:24,376 INFO L225 Difference]: With dead ends: 185 [2020-10-15 16:16:24,376 INFO L226 Difference]: Without dead ends: 180 [2020-10-15 16:16:24,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:16:24,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-15 16:16:24,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-10-15 16:16:24,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:16:24,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-15 16:16:24,380 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-15 16:16:24,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:24,380 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-15 16:16:24,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:16:24,381 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-15 16:16:24,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:24,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:24,381 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:24,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-15 16:16:24,582 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:24,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:24,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-10-15 16:16:24,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:24,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855346770] [2020-10-15 16:16:24,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:24,759 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:24,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855346770] [2020-10-15 16:16:24,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708128207] [2020-10-15 16:16:24,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:24,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:16:24,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:24,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:24,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:25,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:25,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:25,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413689946] [2020-10-15 16:16:25,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:25,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:25,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:25,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:25,015 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-10-15 16:16:25,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:25,075 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-10-15 16:16:25,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:16:25,076 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:16:25,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:25,077 INFO L225 Difference]: With dead ends: 180 [2020-10-15 16:16:25,077 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 16:16:25,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:25,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 16:16:25,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-10-15 16:16:25,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 16:16:25,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-15 16:16:25,079 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-15 16:16:25,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:25,079 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-15 16:16:25,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:25,079 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-15 16:16:25,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:25,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:25,080 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:25,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-15 16:16:25,280 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:25,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:25,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1413108102, now seen corresponding path program 22 times [2020-10-15 16:16:25,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:25,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520365480] [2020-10-15 16:16:25,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:25,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520365480] [2020-10-15 16:16:25,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136720111] [2020-10-15 16:16:25,434 INFO L93 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:25,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:16:25,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:25,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:25,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:25,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:25,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:25,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414689735] [2020-10-15 16:16:25,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:25,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:25,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:25,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:25,642 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-15 16:16:25,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:25,729 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-10-15 16:16:25,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:16:25,729 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:16:25,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:25,730 INFO L225 Difference]: With dead ends: 197 [2020-10-15 16:16:25,730 INFO L226 Difference]: Without dead ends: 194 [2020-10-15 16:16:25,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:16:25,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-15 16:16:25,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-10-15 16:16:25,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 16:16:25,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-15 16:16:25,733 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-15 16:16:25,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:25,733 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-15 16:16:25,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:25,734 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-15 16:16:25,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:25,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:25,734 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:25,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:25,943 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:25,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:25,943 INFO L82 PathProgramCache]: Analyzing trace with hash 551260342, now seen corresponding path program 23 times [2020-10-15 16:16:25,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:25,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773763968] [2020-10-15 16:16:25,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:25,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:26,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773763968] [2020-10-15 16:16:26,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894185727] [2020-10-15 16:16:26,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:26,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:16:26,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:26,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:26,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:26,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:26,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:26,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399821330] [2020-10-15 16:16:26,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:26,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:26,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:26,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:26,365 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-15 16:16:26,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:26,511 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-10-15 16:16:26,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:16:26,513 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:16:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:26,514 INFO L225 Difference]: With dead ends: 196 [2020-10-15 16:16:26,514 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 16:16:26,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:16:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 16:16:26,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-10-15 16:16:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-15 16:16:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-10-15 16:16:26,519 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-10-15 16:16:26,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:26,520 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-10-15 16:16:26,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:26,520 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-10-15 16:16:26,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:26,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:26,521 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:26,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:26,732 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:26,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:26,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1216195462, now seen corresponding path program 24 times [2020-10-15 16:16:26,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:26,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537618511] [2020-10-15 16:16:26,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:26,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537618511] [2020-10-15 16:16:26,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732586726] [2020-10-15 16:16:26,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:26,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:16:26,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:26,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:26,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:27,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:27,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:27,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165928019] [2020-10-15 16:16:27,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:27,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:27,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:27,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:27,115 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-10-15 16:16:27,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:27,248 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-15 16:16:27,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:16:27,249 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:16:27,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:27,249 INFO L225 Difference]: With dead ends: 195 [2020-10-15 16:16:27,250 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 16:16:27,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:16:27,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 16:16:27,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-10-15 16:16:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-15 16:16:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-10-15 16:16:27,253 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-10-15 16:16:27,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:27,254 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-10-15 16:16:27,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-10-15 16:16:27,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:27,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:27,254 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:27,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:27,455 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:27,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:27,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1237644982, now seen corresponding path program 25 times [2020-10-15 16:16:27,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:27,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291207219] [2020-10-15 16:16:27,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:27,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291207219] [2020-10-15 16:16:27,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422795002] [2020-10-15 16:16:27,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:27,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:27,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:27,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:27,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:27,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703395311] [2020-10-15 16:16:27,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:27,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:27,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:27,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:27,795 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-10-15 16:16:27,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:27,982 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-10-15 16:16:27,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:16:27,983 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:16:27,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:27,984 INFO L225 Difference]: With dead ends: 194 [2020-10-15 16:16:27,984 INFO L226 Difference]: Without dead ends: 191 [2020-10-15 16:16:27,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:16:27,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-15 16:16:27,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-10-15 16:16:27,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-15 16:16:27,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-10-15 16:16:27,989 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-10-15 16:16:27,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:27,989 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-10-15 16:16:27,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:27,989 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-10-15 16:16:27,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:27,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:27,990 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:28,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:28,200 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:28,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:28,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1238336902, now seen corresponding path program 26 times [2020-10-15 16:16:28,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:28,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646495705] [2020-10-15 16:16:28,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:28,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646495705] [2020-10-15 16:16:28,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695217168] [2020-10-15 16:16:28,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:28,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:16:28,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:28,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:28,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:28,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:28,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:28,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849115719] [2020-10-15 16:16:28,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:28,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:28,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:28,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:28,529 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-10-15 16:16:28,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:28,736 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-10-15 16:16:28,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:16:28,736 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:16:28,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:28,737 INFO L225 Difference]: With dead ends: 193 [2020-10-15 16:16:28,737 INFO L226 Difference]: Without dead ends: 190 [2020-10-15 16:16:28,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:16:28,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-15 16:16:28,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-10-15 16:16:28,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-15 16:16:28,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-10-15 16:16:28,740 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-10-15 16:16:28,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:28,740 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-10-15 16:16:28,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:28,740 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-10-15 16:16:28,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:28,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:28,741 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:28,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-15 16:16:28,942 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:28,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:28,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1238359222, now seen corresponding path program 27 times [2020-10-15 16:16:28,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:28,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326912123] [2020-10-15 16:16:28,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:29,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326912123] [2020-10-15 16:16:29,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060951824] [2020-10-15 16:16:29,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:29,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:16:29,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:29,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:29,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:29,269 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:16:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:29,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:29,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:29,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724521116] [2020-10-15 16:16:29,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:29,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:29,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:29,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:29,286 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-10-15 16:16:29,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:29,552 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-15 16:16:29,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:16:29,553 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:16:29,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:29,554 INFO L225 Difference]: With dead ends: 202 [2020-10-15 16:16:29,554 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 16:16:29,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:16:29,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 16:16:29,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-10-15 16:16:29,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-15 16:16:29,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-10-15 16:16:29,558 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-10-15 16:16:29,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:29,558 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-10-15 16:16:29,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:29,558 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-10-15 16:16:29,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:29,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:29,559 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:29,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-15 16:16:29,767 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:29,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:29,768 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-10-15 16:16:29,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:29,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148952620] [2020-10-15 16:16:29,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:29,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148952620] [2020-10-15 16:16:29,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111209519] [2020-10-15 16:16:29,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:29,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:16:29,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:29,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:29,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:30,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:30,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:30,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212265343] [2020-10-15 16:16:30,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:30,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:30,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:30,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:30,127 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-10-15 16:16:30,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:30,197 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-10-15 16:16:30,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:16:30,197 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:30,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:30,198 INFO L225 Difference]: With dead ends: 188 [2020-10-15 16:16:30,198 INFO L226 Difference]: Without dead ends: 186 [2020-10-15 16:16:30,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:30,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-15 16:16:30,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-10-15 16:16:30,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 16:16:30,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-10-15 16:16:30,202 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-10-15 16:16:30,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:30,202 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-10-15 16:16:30,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:30,202 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-10-15 16:16:30,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:30,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:30,202 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:30,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-15 16:16:30,403 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:30,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:30,404 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-10-15 16:16:30,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:30,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079728416] [2020-10-15 16:16:30,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:30,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:30,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079728416] [2020-10-15 16:16:30,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296151964] [2020-10-15 16:16:30,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:30,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:16:30,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:30,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:30,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:30,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:30,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:30,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903182164] [2020-10-15 16:16:30,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:30,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:30,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:30,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:30,755 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-10-15 16:16:30,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:30,984 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-10-15 16:16:30,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:16:30,985 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:30,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:30,986 INFO L225 Difference]: With dead ends: 199 [2020-10-15 16:16:30,986 INFO L226 Difference]: Without dead ends: 197 [2020-10-15 16:16:30,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:16:30,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-15 16:16:30,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-10-15 16:16:30,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-15 16:16:30,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-15 16:16:30,989 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-15 16:16:30,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:30,989 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-15 16:16:30,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:30,989 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-15 16:16:30,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:30,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:30,990 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:31,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-15 16:16:31,191 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:31,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:31,191 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-10-15 16:16:31,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:31,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937566489] [2020-10-15 16:16:31,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:31,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937566489] [2020-10-15 16:16:31,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232736345] [2020-10-15 16:16:31,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:31,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:31,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:31,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:31,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:31,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085982617] [2020-10-15 16:16:31,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:31,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:31,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:31,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:31,579 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-15 16:16:31,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:31,871 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-15 16:16:31,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:16:31,871 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:31,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:31,872 INFO L225 Difference]: With dead ends: 210 [2020-10-15 16:16:31,872 INFO L226 Difference]: Without dead ends: 208 [2020-10-15 16:16:31,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:16:31,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-15 16:16:31,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-10-15 16:16:31,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-15 16:16:31,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-10-15 16:16:31,874 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-10-15 16:16:31,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:31,874 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-10-15 16:16:31,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:31,875 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-10-15 16:16:31,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:31,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:31,875 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:32,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-15 16:16:32,076 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:32,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:32,076 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-10-15 16:16:32,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:32,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873363594] [2020-10-15 16:16:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:32,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873363594] [2020-10-15 16:16:32,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822006054] [2020-10-15 16:16:32,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:32,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:16:32,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:32,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:32,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:34,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:34,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:34,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659205769] [2020-10-15 16:16:34,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:34,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:34,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:34,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:34,451 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-10-15 16:16:34,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:34,800 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-15 16:16:34,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:16:34,800 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:34,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:34,801 INFO L225 Difference]: With dead ends: 210 [2020-10-15 16:16:34,801 INFO L226 Difference]: Without dead ends: 208 [2020-10-15 16:16:34,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:16:34,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-15 16:16:34,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-10-15 16:16:34,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-15 16:16:34,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-15 16:16:34,804 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-15 16:16:34,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:34,805 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-15 16:16:34,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:34,805 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-15 16:16:34,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:34,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:34,805 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:35,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-15 16:16:35,006 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:35,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:35,006 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-10-15 16:16:35,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:35,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366135769] [2020-10-15 16:16:35,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:35,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366135769] [2020-10-15 16:16:35,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125252976] [2020-10-15 16:16:35,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:35,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:16:35,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:35,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:35,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:38,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:38,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:38,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018146388] [2020-10-15 16:16:38,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:38,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:38,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:38,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:16:38,270 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-15 16:16:42,476 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:16:44,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:44,774 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-15 16:16:44,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:16:44,775 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:44,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:44,776 INFO L225 Difference]: With dead ends: 218 [2020-10-15 16:16:44,776 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 16:16:44,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=183, Invalid=367, Unknown=2, NotChecked=0, Total=552 [2020-10-15 16:16:44,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 16:16:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-15 16:16:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 16:16:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 16:16:44,779 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 16:16:44,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:44,779 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 16:16:44,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:44,779 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 16:16:44,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:44,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:44,780 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:44,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:44,981 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:44,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:44,981 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-10-15 16:16:44,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:44,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609531742] [2020-10-15 16:16:44,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:45,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609531742] [2020-10-15 16:16:45,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946412544] [2020-10-15 16:16:45,099 INFO L93 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:45,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:16:45,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:45,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:45,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:45,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:45,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:45,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357769808] [2020-10-15 16:16:45,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:45,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:45,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:45,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:45,431 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 16:16:45,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:45,789 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-10-15 16:16:45,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:16:45,790 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:45,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:45,791 INFO L225 Difference]: With dead ends: 212 [2020-10-15 16:16:45,791 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 16:16:45,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:16:45,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 16:16:45,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-10-15 16:16:45,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-15 16:16:45,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-10-15 16:16:45,795 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-10-15 16:16:45,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:45,795 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-10-15 16:16:45,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:45,795 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-10-15 16:16:45,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:45,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:45,795 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:45,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:45,996 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:45,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:45,996 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-10-15 16:16:45,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:45,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547036434] [2020-10-15 16:16:45,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:46,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:46,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547036434] [2020-10-15 16:16:46,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004384191] [2020-10-15 16:16:46,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:46,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:16:46,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:46,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:46,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:46,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:46,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:46,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843686676] [2020-10-15 16:16:46,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:46,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:46,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:46,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:46,326 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-10-15 16:16:46,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:46,652 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-15 16:16:46,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:16:46,653 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:46,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:46,654 INFO L225 Difference]: With dead ends: 212 [2020-10-15 16:16:46,654 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 16:16:46,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:16:46,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 16:16:46,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-10-15 16:16:46,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 16:16:46,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 16:16:46,657 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 16:16:46,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:46,657 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 16:16:46,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:46,657 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 16:16:46,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:46,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:46,657 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:46,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:46,858 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:46,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:46,859 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-10-15 16:16:46,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:46,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493370054] [2020-10-15 16:16:46,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:46,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493370054] [2020-10-15 16:16:46,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840139057] [2020-10-15 16:16:46,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:47,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:16:47,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:47,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:47,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:47,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:47,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:47,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097022273] [2020-10-15 16:16:47,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:47,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:47,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:47,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:47,202 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 16:16:47,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:47,578 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-10-15 16:16:47,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:16:47,578 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:47,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:47,579 INFO L225 Difference]: With dead ends: 224 [2020-10-15 16:16:47,579 INFO L226 Difference]: Without dead ends: 222 [2020-10-15 16:16:47,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:16:47,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-15 16:16:47,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-10-15 16:16:47,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 16:16:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 16:16:47,583 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 16:16:47,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:47,583 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 16:16:47,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:47,583 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 16:16:47,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:47,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:47,584 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:47,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:47,786 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:47,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:47,786 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-10-15 16:16:47,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:47,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920407356] [2020-10-15 16:16:47,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:47,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920407356] [2020-10-15 16:16:47,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869260597] [2020-10-15 16:16:47,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:47,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:47,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:47,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:48,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:48,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:48,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473219869] [2020-10-15 16:16:48,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:48,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:48,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:48,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:48,104 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 16:16:48,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:48,418 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-10-15 16:16:48,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:16:48,419 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:48,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:48,419 INFO L225 Difference]: With dead ends: 218 [2020-10-15 16:16:48,419 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 16:16:48,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:16:48,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 16:16:48,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-15 16:16:48,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 16:16:48,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 16:16:48,422 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 16:16:48,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:48,422 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 16:16:48,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:48,422 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 16:16:48,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:48,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:48,423 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:48,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:48,624 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:48,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:48,624 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-10-15 16:16:48,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:48,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129680424] [2020-10-15 16:16:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:48,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129680424] [2020-10-15 16:16:48,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590831151] [2020-10-15 16:16:48,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:48,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:16:48,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:48,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:48,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:48,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:48,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:48,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495406348] [2020-10-15 16:16:48,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:48,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:48,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:48,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:48,937 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 16:16:49,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:49,210 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-10-15 16:16:49,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:16:49,211 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:49,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:49,211 INFO L225 Difference]: With dead ends: 206 [2020-10-15 16:16:49,211 INFO L226 Difference]: Without dead ends: 204 [2020-10-15 16:16:49,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:16:49,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-15 16:16:49,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-10-15 16:16:49,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-15 16:16:49,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-10-15 16:16:49,215 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-10-15 16:16:49,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:49,215 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-10-15 16:16:49,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:49,215 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-10-15 16:16:49,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:49,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:49,215 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:49,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-15 16:16:49,416 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:49,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:49,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-10-15 16:16:49,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:49,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874219783] [2020-10-15 16:16:49,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:49,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874219783] [2020-10-15 16:16:49,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634220350] [2020-10-15 16:16:49,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:49,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:16:49,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:49,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:49,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:49,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:49,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:49,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034976058] [2020-10-15 16:16:49,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:49,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:49,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:49,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:49,743 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-10-15 16:16:50,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:50,037 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-10-15 16:16:50,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:16:50,038 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:50,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:50,039 INFO L225 Difference]: With dead ends: 207 [2020-10-15 16:16:50,039 INFO L226 Difference]: Without dead ends: 205 [2020-10-15 16:16:50,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:16:50,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-15 16:16:50,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-10-15 16:16:50,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 16:16:50,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-10-15 16:16:50,045 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-10-15 16:16:50,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:50,045 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-10-15 16:16:50,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:50,046 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-10-15 16:16:50,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:50,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:50,046 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:50,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-15 16:16:50,254 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:50,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:50,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-10-15 16:16:50,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:50,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679647131] [2020-10-15 16:16:50,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:50,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679647131] [2020-10-15 16:16:50,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849806562] [2020-10-15 16:16:50,374 INFO L93 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:50,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:16:50,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:50,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:50,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:50,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:50,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:50,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358380905] [2020-10-15 16:16:50,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:50,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:50,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:50,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:50,600 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-10-15 16:16:50,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:50,906 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-10-15 16:16:50,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:16:50,907 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:50,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:50,908 INFO L225 Difference]: With dead ends: 217 [2020-10-15 16:16:50,909 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 16:16:50,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:16:50,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 16:16:50,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-10-15 16:16:50,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 16:16:50,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-10-15 16:16:50,912 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-10-15 16:16:50,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:50,912 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-10-15 16:16:50,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:50,913 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-10-15 16:16:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:50,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:50,913 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:51,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-15 16:16:51,114 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:51,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-10-15 16:16:51,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:51,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377727194] [2020-10-15 16:16:51,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:51,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377727194] [2020-10-15 16:16:51,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742890965] [2020-10-15 16:16:51,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:51,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:16:51,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:51,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:51,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:52,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:52,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:52,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728653665] [2020-10-15 16:16:52,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:52,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:52,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:52,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:52,299 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-10-15 16:16:52,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:52,718 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-10-15 16:16:52,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:16:52,719 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:52,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:52,719 INFO L225 Difference]: With dead ends: 223 [2020-10-15 16:16:52,720 INFO L226 Difference]: Without dead ends: 221 [2020-10-15 16:16:52,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:16:52,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-15 16:16:52,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-10-15 16:16:52,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:16:52,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-10-15 16:16:52,724 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-10-15 16:16:52,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:52,724 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-10-15 16:16:52,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:52,724 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-10-15 16:16:52,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:52,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:52,725 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:52,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-15 16:16:52,928 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:52,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:52,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-10-15 16:16:52,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:52,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389374874] [2020-10-15 16:16:52,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:53,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389374874] [2020-10-15 16:16:53,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806694150] [2020-10-15 16:16:53,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:53,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:16:53,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:53,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:53,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:53,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:53,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:53,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769487725] [2020-10-15 16:16:53,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:53,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:53,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:53,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:53,275 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-10-15 16:16:53,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:53,606 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-10-15 16:16:53,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:16:53,607 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:53,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:53,608 INFO L225 Difference]: With dead ends: 225 [2020-10-15 16:16:53,608 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 16:16:53,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:16:53,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 16:16:53,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-10-15 16:16:53,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 16:16:53,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-10-15 16:16:53,612 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-10-15 16:16:53,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:53,612 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-10-15 16:16:53,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:53,612 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-10-15 16:16:53,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:53,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:53,613 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:53,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:53,814 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:53,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:53,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-10-15 16:16:53,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:53,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157990662] [2020-10-15 16:16:53,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:53,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157990662] [2020-10-15 16:16:53,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819931423] [2020-10-15 16:16:53,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:53,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:53,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:54,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:54,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:54,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913626214] [2020-10-15 16:16:54,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:54,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:54,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:54,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:54,198 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-10-15 16:16:54,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:54,520 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-10-15 16:16:54,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:16:54,521 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:54,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:54,521 INFO L225 Difference]: With dead ends: 214 [2020-10-15 16:16:54,521 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 16:16:54,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:16:54,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 16:16:54,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-10-15 16:16:54,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:16:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-10-15 16:16:54,525 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-10-15 16:16:54,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:54,526 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-10-15 16:16:54,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:54,526 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-10-15 16:16:54,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:54,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:54,526 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:54,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:54,727 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:54,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:54,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-10-15 16:16:54,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:54,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483120073] [2020-10-15 16:16:54,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:54,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:54,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483120073] [2020-10-15 16:16:54,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468438217] [2020-10-15 16:16:54,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:54,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:16:54,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:54,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:54,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:55,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:55,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:55,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987357327] [2020-10-15 16:16:55,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:55,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:55,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:55,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:55,112 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-10-15 16:16:55,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:55,348 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-10-15 16:16:55,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:16:55,348 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:55,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:55,349 INFO L225 Difference]: With dead ends: 203 [2020-10-15 16:16:55,349 INFO L226 Difference]: Without dead ends: 201 [2020-10-15 16:16:55,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:16:55,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-15 16:16:55,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-10-15 16:16:55,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 16:16:55,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-10-15 16:16:55,352 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-10-15 16:16:55,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:55,353 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-10-15 16:16:55,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:55,353 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-10-15 16:16:55,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:55,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:55,353 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:55,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-15 16:16:55,554 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:55,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:55,555 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-10-15 16:16:55,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:55,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020578549] [2020-10-15 16:16:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:55,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020578549] [2020-10-15 16:16:55,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902813661] [2020-10-15 16:16:55,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:55,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:16:55,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:55,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:55,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:55,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:55,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:55,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805517826] [2020-10-15 16:16:55,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:55,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:55,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:55,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:55,974 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-10-15 16:16:56,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:56,053 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-15 16:16:56,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:16:56,053 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:56,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:56,054 INFO L225 Difference]: With dead ends: 212 [2020-10-15 16:16:56,054 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 16:16:56,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:16:56,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 16:16:56,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-10-15 16:16:56,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:16:56,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-10-15 16:16:56,057 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-10-15 16:16:56,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:56,058 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-10-15 16:16:56,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:56,058 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-10-15 16:16:56,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:56,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:56,058 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:56,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:56,259 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:56,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:56,259 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-10-15 16:16:56,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:56,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704826016] [2020-10-15 16:16:56,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:56,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:56,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704826016] [2020-10-15 16:16:56,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40263181] [2020-10-15 16:16:56,439 INFO L93 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:56,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:16:56,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:56,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:56,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:56,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:56,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:56,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:56,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924311091] [2020-10-15 16:16:56,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:56,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:56,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:56,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:56,681 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-10-15 16:16:56,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:56,939 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-10-15 16:16:56,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:16:56,940 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:56,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:56,940 INFO L225 Difference]: With dead ends: 217 [2020-10-15 16:16:56,940 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 16:16:56,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:16:56,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 16:16:56,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-10-15 16:16:56,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:16:56,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-15 16:16:56,945 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-15 16:16:56,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:56,945 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-15 16:16:56,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:56,946 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-15 16:16:56,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:56,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:56,946 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:57,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:57,147 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:57,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:57,147 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-10-15 16:16:57,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:57,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112731033] [2020-10-15 16:16:57,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:57,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112731033] [2020-10-15 16:16:57,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960912149] [2020-10-15 16:16:57,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:57,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:16:57,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:57,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:57,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:57,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:57,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:57,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973865230] [2020-10-15 16:16:57,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:57,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:57,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:57,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:57,572 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-15 16:16:57,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:57,913 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-15 16:16:57,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:16:57,914 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:57,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:57,915 INFO L225 Difference]: With dead ends: 227 [2020-10-15 16:16:57,915 INFO L226 Difference]: Without dead ends: 225 [2020-10-15 16:16:57,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:16:57,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-15 16:16:57,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-10-15 16:16:57,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:16:57,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-10-15 16:16:57,919 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-10-15 16:16:57,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:57,919 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-10-15 16:16:57,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:57,919 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-10-15 16:16:57,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:57,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:57,920 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:58,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:58,120 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:58,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:58,121 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-10-15 16:16:58,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:58,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025333320] [2020-10-15 16:16:58,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:58,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025333320] [2020-10-15 16:16:58,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62540729] [2020-10-15 16:16:58,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:58,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:16:58,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:58,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:58,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:58,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:58,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:58,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336352965] [2020-10-15 16:16:58,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:58,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:58,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:58,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:58,511 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-10-15 16:16:58,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:58,942 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-15 16:16:58,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:16:58,943 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:58,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:58,944 INFO L225 Difference]: With dead ends: 227 [2020-10-15 16:16:58,944 INFO L226 Difference]: Without dead ends: 225 [2020-10-15 16:16:58,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:16:58,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-15 16:16:58,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-10-15 16:16:58,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:16:58,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-15 16:16:58,948 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-15 16:16:58,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:58,948 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-15 16:16:58,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:58,948 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-15 16:16:58,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:58,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:58,949 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:59,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-15 16:16:59,151 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:59,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:59,151 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-10-15 16:16:59,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:59,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079757445] [2020-10-15 16:16:59,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:59,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079757445] [2020-10-15 16:16:59,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887784831] [2020-10-15 16:16:59,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:59,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:59,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:03,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:03,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:03,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780296446] [2020-10-15 16:17:03,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:03,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:03,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:03,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:17:03,550 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-15 16:17:07,783 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:17:08,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:08,138 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-10-15 16:17:08,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:17:08,139 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:08,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:08,140 INFO L225 Difference]: With dead ends: 237 [2020-10-15 16:17:08,140 INFO L226 Difference]: Without dead ends: 235 [2020-10-15 16:17:08,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-10-15 16:17:08,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-15 16:17:08,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-10-15 16:17:08,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:17:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 16:17:08,143 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 16:17:08,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:08,143 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 16:17:08,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:08,143 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 16:17:08,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:08,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:08,144 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:08,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-15 16:17:08,345 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:08,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:08,345 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-10-15 16:17:08,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:08,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951733547] [2020-10-15 16:17:08,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:08,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951733547] [2020-10-15 16:17:08,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202206609] [2020-10-15 16:17:08,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:08,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:08,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:08,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:08,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:08,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:08,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:08,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752935446] [2020-10-15 16:17:08,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:08,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:08,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:08,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:08,757 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 16:17:09,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:09,206 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-10-15 16:17:09,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:17:09,207 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:09,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:09,208 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:17:09,208 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:17:09,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:17:09,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:17:09,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-15 16:17:09,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:17:09,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-10-15 16:17:09,211 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-10-15 16:17:09,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:09,211 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-10-15 16:17:09,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:09,211 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-10-15 16:17:09,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:09,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:09,212 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:09,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-15 16:17:09,419 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:09,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:09,420 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-10-15 16:17:09,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:09,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894689597] [2020-10-15 16:17:09,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:09,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:09,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:09,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894689597] [2020-10-15 16:17:09,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445933570] [2020-10-15 16:17:09,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:09,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:17:09,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:09,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:09,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:09,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:09,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:09,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385026568] [2020-10-15 16:17:09,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:09,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:09,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:09,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:09,745 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-10-15 16:17:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:10,180 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-10-15 16:17:10,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:17:10,180 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:10,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:10,181 INFO L225 Difference]: With dead ends: 225 [2020-10-15 16:17:10,181 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 16:17:10,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:17:10,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 16:17:10,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-10-15 16:17:10,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:17:10,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 16:17:10,184 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 16:17:10,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:10,184 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 16:17:10,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:10,184 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 16:17:10,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:10,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:10,185 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:10,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-15 16:17:10,385 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:10,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:10,386 INFO L82 PathProgramCache]: Analyzing trace with hash 319904318, now seen corresponding path program 136 times [2020-10-15 16:17:10,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:10,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939893768] [2020-10-15 16:17:10,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:10,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939893768] [2020-10-15 16:17:10,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842976400] [2020-10-15 16:17:10,498 INFO L93 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:10,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:10,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:10,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:10,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:10,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:10,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:10,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060200905] [2020-10-15 16:17:10,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:10,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:10,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:10,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:10,720 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 16:17:11,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:11,185 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-10-15 16:17:11,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:17:11,185 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:11,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:11,186 INFO L225 Difference]: With dead ends: 239 [2020-10-15 16:17:11,186 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 16:17:11,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:17:11,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 16:17:11,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-15 16:17:11,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:17:11,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 16:17:11,190 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 16:17:11,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:11,190 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 16:17:11,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:11,190 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 16:17:11,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:11,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:11,190 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:11,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-15 16:17:11,391 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:11,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:11,392 INFO L82 PathProgramCache]: Analyzing trace with hash 319933148, now seen corresponding path program 137 times [2020-10-15 16:17:11,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:11,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006733960] [2020-10-15 16:17:11,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:11,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006733960] [2020-10-15 16:17:11,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786791003] [2020-10-15 16:17:11,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:11,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:17:11,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:11,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:11,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:11,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:11,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:11,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:11,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252104232] [2020-10-15 16:17:11,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:11,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:11,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:11,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:11,739 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 16:17:12,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:12,273 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-10-15 16:17:12,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:17:12,274 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:12,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:12,275 INFO L225 Difference]: With dead ends: 234 [2020-10-15 16:17:12,276 INFO L226 Difference]: Without dead ends: 232 [2020-10-15 16:17:12,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:17:12,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-15 16:17:12,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-10-15 16:17:12,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:17:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 16:17:12,281 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 16:17:12,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:12,282 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 16:17:12,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:12,282 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 16:17:12,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:12,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:12,283 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:12,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-10-15 16:17:12,494 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:12,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:12,495 INFO L82 PathProgramCache]: Analyzing trace with hash 320857630, now seen corresponding path program 138 times [2020-10-15 16:17:12,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:12,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985756493] [2020-10-15 16:17:12,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:12,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985756493] [2020-10-15 16:17:12,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894328656] [2020-10-15 16:17:12,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:12,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:17:12,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:12,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:12,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:12,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:12,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:12,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500780445] [2020-10-15 16:17:12,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:12,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:12,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:12,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:12,941 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 16:17:13,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:13,294 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-10-15 16:17:13,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:17:13,296 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:13,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:13,296 INFO L225 Difference]: With dead ends: 218 [2020-10-15 16:17:13,296 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 16:17:13,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:17:13,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 16:17:13,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-10-15 16:17:13,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 16:17:13,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-10-15 16:17:13,300 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-10-15 16:17:13,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:13,300 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-10-15 16:17:13,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:13,301 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-10-15 16:17:13,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:13,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:13,301 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:13,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:13,502 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:13,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:13,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1429448084, now seen corresponding path program 139 times [2020-10-15 16:17:13,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:13,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572924503] [2020-10-15 16:17:13,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:13,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:13,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572924503] [2020-10-15 16:17:13,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833190038] [2020-10-15 16:17:13,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:13,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:13,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:13,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:13,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:13,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142070637] [2020-10-15 16:17:13,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:13,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:13,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:13,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:13,949 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-10-15 16:17:14,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:14,059 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-10-15 16:17:14,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:17:14,060 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:14,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:14,060 INFO L225 Difference]: With dead ends: 208 [2020-10-15 16:17:14,060 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 16:17:14,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:17:14,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 16:17:14,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-10-15 16:17:14,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:17:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-10-15 16:17:14,064 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-10-15 16:17:14,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:14,064 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-10-15 16:17:14,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:14,064 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-10-15 16:17:14,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:14,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:14,065 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:14,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:14,272 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:14,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:14,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 140 times [2020-10-15 16:17:14,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:14,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580521503] [2020-10-15 16:17:14,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:14,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580521503] [2020-10-15 16:17:14,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416372246] [2020-10-15 16:17:14,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:14,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:14,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:14,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:14,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:14,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:14,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:14,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627549707] [2020-10-15 16:17:14,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:14,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:14,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:14,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:14,639 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-10-15 16:17:14,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:14,915 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-10-15 16:17:14,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:17:14,916 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:14,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:14,916 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:17:14,916 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:17:14,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:17:14,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:17:14,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-10-15 16:17:14,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:17:14,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-15 16:17:14,920 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-15 16:17:14,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:14,920 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-15 16:17:14,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:14,920 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-15 16:17:14,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:14,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:14,920 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:15,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:15,121 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:15,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:15,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 141 times [2020-10-15 16:17:15,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:15,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604033171] [2020-10-15 16:17:15,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:15,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604033171] [2020-10-15 16:17:15,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362669745] [2020-10-15 16:17:15,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:15,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:17:15,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:15,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:15,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:15,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:15,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:15,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476717123] [2020-10-15 16:17:15,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:15,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:15,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:15,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:15,494 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-15 16:17:15,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:15,859 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-10-15 16:17:15,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:17:15,861 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:15,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:15,861 INFO L225 Difference]: With dead ends: 235 [2020-10-15 16:17:15,862 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:17:15,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:17:15,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:17:15,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-10-15 16:17:15,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 16:17:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-10-15 16:17:15,865 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-10-15 16:17:15,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:15,865 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-10-15 16:17:15,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:15,865 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-10-15 16:17:15,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:15,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:15,866 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:16,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:16,066 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:16,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:16,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 142 times [2020-10-15 16:17:16,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:16,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736255922] [2020-10-15 16:17:16,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:16,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736255922] [2020-10-15 16:17:16,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892698816] [2020-10-15 16:17:16,174 INFO L93 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:16,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:16,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:16,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:16,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:16,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:16,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:16,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582112889] [2020-10-15 16:17:16,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:16,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:16,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:16,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:16,455 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-10-15 16:17:16,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:16,904 INFO L93 Difference]: Finished difference Result 233 states and 544 transitions. [2020-10-15 16:17:16,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:17:16,905 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:16,905 INFO L225 Difference]: With dead ends: 233 [2020-10-15 16:17:16,905 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 16:17:16,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:17:16,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 16:17:16,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-10-15 16:17:16,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:17:16,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-15 16:17:16,909 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-15 16:17:16,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:16,910 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-15 16:17:16,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:16,910 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-15 16:17:16,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:16,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:16,910 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:17,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:17,119 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:17,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:17,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1428523602, now seen corresponding path program 143 times [2020-10-15 16:17:17,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:17,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256386949] [2020-10-15 16:17:17,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:17,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256386949] [2020-10-15 16:17:17,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052873724] [2020-10-15 16:17:17,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:17,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:17,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:17,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:17,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:21,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:21,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:21,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220469483] [2020-10-15 16:17:21,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:21,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:21,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:21,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:17:21,146 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-15 16:17:25,413 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:17:25,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:25,743 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-10-15 16:17:25,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:17:25,744 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:25,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:25,745 INFO L225 Difference]: With dead ends: 241 [2020-10-15 16:17:25,745 INFO L226 Difference]: Without dead ends: 239 [2020-10-15 16:17:25,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-10-15 16:17:25,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-15 16:17:25,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-15 16:17:25,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:17:25,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-10-15 16:17:25,756 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-10-15 16:17:25,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:25,756 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-10-15 16:17:25,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:25,756 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-10-15 16:17:25,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:25,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:25,757 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:25,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:25,966 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:25,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:25,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1428494772, now seen corresponding path program 144 times [2020-10-15 16:17:25,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:25,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579321218] [2020-10-15 16:17:25,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:26,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579321218] [2020-10-15 16:17:26,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996858812] [2020-10-15 16:17:26,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:26,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:17:26,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:26,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:26,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:26,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:26,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:26,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:26,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039658270] [2020-10-15 16:17:26,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:26,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:26,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:26,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:26,359 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-10-15 16:17:26,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:26,825 INFO L93 Difference]: Finished difference Result 233 states and 548 transitions. [2020-10-15 16:17:26,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:17:26,826 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:26,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:26,826 INFO L225 Difference]: With dead ends: 233 [2020-10-15 16:17:26,826 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 16:17:26,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:17:26,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 16:17:26,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2020-10-15 16:17:26,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:17:26,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-10-15 16:17:26,830 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-10-15 16:17:26,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:26,830 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-10-15 16:17:26,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:26,830 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-10-15 16:17:26,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:26,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:26,831 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:27,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-10-15 16:17:27,031 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:27,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:27,032 INFO L82 PathProgramCache]: Analyzing trace with hash -792218594, now seen corresponding path program 145 times [2020-10-15 16:17:27,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:27,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924333555] [2020-10-15 16:17:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:27,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924333555] [2020-10-15 16:17:27,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228787000] [2020-10-15 16:17:27,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:27,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:27,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:27,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:27,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:27,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:27,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105449729] [2020-10-15 16:17:27,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:27,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:27,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:27,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:27,404 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-10-15 16:17:27,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:27,555 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-10-15 16:17:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:17:27,556 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:27,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:27,557 INFO L225 Difference]: With dead ends: 204 [2020-10-15 16:17:27,557 INFO L226 Difference]: Without dead ends: 202 [2020-10-15 16:17:27,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:17:27,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-15 16:17:27,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-10-15 16:17:27,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:17:27,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-10-15 16:17:27,561 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-10-15 16:17:27,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:27,561 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-10-15 16:17:27,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:27,561 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-10-15 16:17:27,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:27,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:27,562 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:27,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:27,763 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:27,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:27,763 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 146 times [2020-10-15 16:17:27,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:27,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496085486] [2020-10-15 16:17:27,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:27,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496085486] [2020-10-15 16:17:27,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635850020] [2020-10-15 16:17:27,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:27,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:27,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:27,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:27,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:28,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:28,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:28,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754090584] [2020-10-15 16:17:28,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:28,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:28,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:28,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:28,122 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-10-15 16:17:28,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:28,472 INFO L93 Difference]: Finished difference Result 225 states and 527 transitions. [2020-10-15 16:17:28,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:17:28,473 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:28,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:28,474 INFO L225 Difference]: With dead ends: 225 [2020-10-15 16:17:28,474 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 16:17:28,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:17:28,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 16:17:28,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-10-15 16:17:28,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:17:28,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-10-15 16:17:28,477 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-10-15 16:17:28,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:28,478 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-10-15 16:17:28,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:28,478 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-10-15 16:17:28,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:28,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:28,478 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:28,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-15 16:17:28,679 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:28,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:28,679 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 147 times [2020-10-15 16:17:28,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:28,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837485150] [2020-10-15 16:17:28,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:28,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837485150] [2020-10-15 16:17:28,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592033964] [2020-10-15 16:17:28,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:28,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:17:28,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:28,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:28,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:29,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:29,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:29,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702532285] [2020-10-15 16:17:29,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:29,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:29,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:29,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:29,109 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-10-15 16:17:29,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:29,663 INFO L93 Difference]: Finished difference Result 231 states and 539 transitions. [2020-10-15 16:17:29,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:17:29,664 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:29,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:29,665 INFO L225 Difference]: With dead ends: 231 [2020-10-15 16:17:29,665 INFO L226 Difference]: Without dead ends: 229 [2020-10-15 16:17:29,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:17:29,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-15 16:17:29,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2020-10-15 16:17:29,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 16:17:29,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-10-15 16:17:29,669 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-10-15 16:17:29,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:29,669 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-10-15 16:17:29,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:29,669 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-10-15 16:17:29,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:29,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:29,670 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:29,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:29,880 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:29,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:29,881 INFO L82 PathProgramCache]: Analyzing trace with hash -771662804, now seen corresponding path program 148 times [2020-10-15 16:17:29,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:29,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575343204] [2020-10-15 16:17:29,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:30,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575343204] [2020-10-15 16:17:30,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771805803] [2020-10-15 16:17:30,016 INFO L93 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:30,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:30,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:30,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:30,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:30,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:30,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:30,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187764172] [2020-10-15 16:17:30,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:30,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:30,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:30,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:30,222 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-10-15 16:17:30,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:30,421 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-10-15 16:17:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:17:30,421 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:30,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:30,422 INFO L225 Difference]: With dead ends: 200 [2020-10-15 16:17:30,422 INFO L226 Difference]: Without dead ends: 198 [2020-10-15 16:17:30,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:17:30,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-15 16:17:30,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-10-15 16:17:30,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:17:30,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-10-15 16:17:30,426 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-10-15 16:17:30,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:30,426 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-10-15 16:17:30,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:30,426 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-10-15 16:17:30,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:30,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:30,426 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:30,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:30,630 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:30,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:30,630 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 149 times [2020-10-15 16:17:30,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:30,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083587686] [2020-10-15 16:17:30,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:30,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083587686] [2020-10-15 16:17:30,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576395033] [2020-10-15 16:17:30,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:30,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:17:30,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:30,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:30,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:30,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:30,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:30,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558157759] [2020-10-15 16:17:30,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:30,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:30,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:30,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:30,980 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-10-15 16:17:31,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:31,371 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-10-15 16:17:31,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:17:31,372 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:31,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:31,373 INFO L225 Difference]: With dead ends: 221 [2020-10-15 16:17:31,373 INFO L226 Difference]: Without dead ends: 219 [2020-10-15 16:17:31,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:17:31,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-15 16:17:31,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 162. [2020-10-15 16:17:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:17:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-10-15 16:17:31,376 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-10-15 16:17:31,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:31,377 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-10-15 16:17:31,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-10-15 16:17:31,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:31,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:31,377 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:31,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-10-15 16:17:31,587 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:31,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:31,587 INFO L82 PathProgramCache]: Analyzing trace with hash -770999714, now seen corresponding path program 150 times [2020-10-15 16:17:31,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:31,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973954241] [2020-10-15 16:17:31,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:31,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973954241] [2020-10-15 16:17:31,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913281793] [2020-10-15 16:17:31,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:31,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:17:31,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:31,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:31,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:31,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:31,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:31,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085801864] [2020-10-15 16:17:31,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:31,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:31,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:31,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:31,943 INFO L87 Difference]: Start difference. First operand 162 states and 405 transitions. Second operand 17 states. [2020-10-15 16:17:32,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:32,171 INFO L93 Difference]: Finished difference Result 201 states and 476 transitions. [2020-10-15 16:17:32,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:17:32,172 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:32,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:32,172 INFO L225 Difference]: With dead ends: 201 [2020-10-15 16:17:32,173 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 16:17:32,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:17:32,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 16:17:32,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-10-15 16:17:32,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:17:32,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 16:17:32,175 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 16:17:32,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:32,175 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 16:17:32,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:32,175 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 16:17:32,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:32,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:32,176 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:32,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:32,377 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:32,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:32,377 INFO L82 PathProgramCache]: Analyzing trace with hash -770977394, now seen corresponding path program 151 times [2020-10-15 16:17:32,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:32,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115244070] [2020-10-15 16:17:32,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:32,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115244070] [2020-10-15 16:17:32,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931267034] [2020-10-15 16:17:32,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:32,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:32,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:32,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:17:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:32,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:32,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:32,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302356773] [2020-10-15 16:17:32,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:32,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:32,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:32,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:32,750 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 16:17:33,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:33,272 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-10-15 16:17:33,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:17:33,273 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:33,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:33,274 INFO L225 Difference]: With dead ends: 226 [2020-10-15 16:17:33,274 INFO L226 Difference]: Without dead ends: 221 [2020-10-15 16:17:33,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:17:33,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-15 16:17:33,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 164. [2020-10-15 16:17:33,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:17:33,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-15 16:17:33,277 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-15 16:17:33,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:33,278 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-15 16:17:33,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:33,278 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-15 16:17:33,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:33,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:33,278 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:33,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:33,479 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:33,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:33,480 INFO L82 PathProgramCache]: Analyzing trace with hash -770969923, now seen corresponding path program 152 times [2020-10-15 16:17:33,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:33,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478398641] [2020-10-15 16:17:33,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:33,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:33,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478398641] [2020-10-15 16:17:33,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110004024] [2020-10-15 16:17:33,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:33,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:33,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:33,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:33,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:33,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:33,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:33,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776587947] [2020-10-15 16:17:33,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:33,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:33,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:33,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:33,837 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-15 16:17:34,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:34,261 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-15 16:17:34,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:17:34,262 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:34,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:34,263 INFO L225 Difference]: With dead ends: 218 [2020-10-15 16:17:34,263 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 16:17:34,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:17:34,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 16:17:34,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-10-15 16:17:34,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:17:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 16:17:34,265 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 16:17:34,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:34,265 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 16:17:34,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:34,266 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 16:17:34,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:34,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:34,266 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:34,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:34,467 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:34,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:34,467 INFO L82 PathProgramCache]: Analyzing trace with hash -770948564, now seen corresponding path program 153 times [2020-10-15 16:17:34,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:34,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723858804] [2020-10-15 16:17:34,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:34,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723858804] [2020-10-15 16:17:34,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673233100] [2020-10-15 16:17:34,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:34,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:17:34,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:34,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:34,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:34,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:17:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:34,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:34,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:34,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681180061] [2020-10-15 16:17:34,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:34,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:34,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:34,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:34,818 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 16:17:35,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:35,516 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-10-15 16:17:35,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:17:35,517 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:35,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:35,518 INFO L225 Difference]: With dead ends: 248 [2020-10-15 16:17:35,518 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 16:17:35,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:17:35,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 16:17:35,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-10-15 16:17:35,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:17:35,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 16:17:35,521 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 16:17:35,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:35,521 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 16:17:35,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:35,521 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 16:17:35,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:35,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:35,522 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:35,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:35,724 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:35,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:35,724 INFO L82 PathProgramCache]: Analyzing trace with hash -770947603, now seen corresponding path program 154 times [2020-10-15 16:17:35,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:35,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936102603] [2020-10-15 16:17:35,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:35,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936102603] [2020-10-15 16:17:35,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429503878] [2020-10-15 16:17:35,836 INFO L93 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:35,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:35,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:35,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:35,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:36,042 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:17:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:36,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:36,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:36,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887171137] [2020-10-15 16:17:36,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:36,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:36,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:36,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:36,067 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 16:17:36,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:36,579 INFO L93 Difference]: Finished difference Result 238 states and 567 transitions. [2020-10-15 16:17:36,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:17:36,580 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:36,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:36,580 INFO L225 Difference]: With dead ends: 238 [2020-10-15 16:17:36,581 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:17:36,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:17:36,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:17:36,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-15 16:17:36,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:17:36,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-15 16:17:36,584 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-15 16:17:36,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:36,584 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-15 16:17:36,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:36,584 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-15 16:17:36,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:36,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:36,585 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:36,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:36,785 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:36,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:36,786 INFO L82 PathProgramCache]: Analyzing trace with hash -770739283, now seen corresponding path program 155 times [2020-10-15 16:17:36,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:36,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528910388] [2020-10-15 16:17:36,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:36,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528910388] [2020-10-15 16:17:36,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185315031] [2020-10-15 16:17:36,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:36,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:17:36,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:36,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:36,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:37,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:37,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:37,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111576642] [2020-10-15 16:17:37,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:37,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:37,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:37,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:37,197 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-15 16:17:37,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:37,843 INFO L93 Difference]: Finished difference Result 235 states and 547 transitions. [2020-10-15 16:17:37,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:17:37,844 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:37,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:37,844 INFO L225 Difference]: With dead ends: 235 [2020-10-15 16:17:37,845 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:17:37,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:17:37,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:17:37,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-10-15 16:17:37,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:17:37,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-15 16:17:37,849 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-15 16:17:37,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:37,849 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-15 16:17:37,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:37,850 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-15 16:17:37,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:37,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:37,850 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:38,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:38,059 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:38,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:38,059 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 156 times [2020-10-15 16:17:38,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:38,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894557906] [2020-10-15 16:17:38,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:38,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:38,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894557906] [2020-10-15 16:17:38,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113438237] [2020-10-15 16:17:38,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:38,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:17:38,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:38,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:38,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:39,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:39,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:39,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885271944] [2020-10-15 16:17:39,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:39,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:39,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:39,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:39,284 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-15 16:17:39,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:39,935 INFO L93 Difference]: Finished difference Result 252 states and 594 transitions. [2020-10-15 16:17:39,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:17:39,936 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:39,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:39,937 INFO L225 Difference]: With dead ends: 252 [2020-10-15 16:17:39,937 INFO L226 Difference]: Without dead ends: 250 [2020-10-15 16:17:39,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:17:39,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-15 16:17:39,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2020-10-15 16:17:39,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:17:39,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 16:17:39,941 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 16:17:39,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:39,941 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 16:17:39,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:39,941 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 16:17:39,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:39,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:39,942 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:40,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-15 16:17:40,142 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:40,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:40,143 INFO L82 PathProgramCache]: Analyzing trace with hash -770054834, now seen corresponding path program 157 times [2020-10-15 16:17:40,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:40,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129826913] [2020-10-15 16:17:40,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:40,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129826913] [2020-10-15 16:17:40,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920070561] [2020-10-15 16:17:40,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:40,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:40,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:40,531 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:17:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:40,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:40,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:40,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542193612] [2020-10-15 16:17:40,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:40,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:40,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:40,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:40,581 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 16:17:41,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:41,491 INFO L93 Difference]: Finished difference Result 258 states and 617 transitions. [2020-10-15 16:17:41,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:17:41,493 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:41,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:41,493 INFO L225 Difference]: With dead ends: 258 [2020-10-15 16:17:41,493 INFO L226 Difference]: Without dead ends: 253 [2020-10-15 16:17:41,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:17:41,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-15 16:17:41,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-15 16:17:41,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:17:41,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 16:17:41,498 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 16:17:41,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:41,498 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 16:17:41,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:41,498 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 16:17:41,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:41,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:41,498 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:41,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-10-15 16:17:41,700 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:41,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:41,701 INFO L82 PathProgramCache]: Analyzing trace with hash -770053873, now seen corresponding path program 158 times [2020-10-15 16:17:41,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:41,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424616673] [2020-10-15 16:17:41,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:41,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424616673] [2020-10-15 16:17:41,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155969284] [2020-10-15 16:17:41,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:41,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:41,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:41,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:41,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:44,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:17:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:44,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:44,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:44,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748942522] [2020-10-15 16:17:44,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:44,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:44,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:44,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:17:44,146 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 16:17:48,456 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-15 16:17:52,742 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-15 16:17:53,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:53,414 INFO L93 Difference]: Finished difference Result 287 states and 685 transitions. [2020-10-15 16:17:53,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:17:53,415 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:53,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:53,416 INFO L225 Difference]: With dead ends: 287 [2020-10-15 16:17:53,416 INFO L226 Difference]: Without dead ends: 279 [2020-10-15 16:17:53,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=370, Invalid=819, Unknown=1, NotChecked=0, Total=1190 [2020-10-15 16:17:53,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-15 16:17:53,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 162. [2020-10-15 16:17:53,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:17:53,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 400 transitions. [2020-10-15 16:17:53,420 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 400 transitions. Word has length 14 [2020-10-15 16:17:53,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:53,420 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 400 transitions. [2020-10-15 16:17:53,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:53,420 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 400 transitions. [2020-10-15 16:17:53,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:53,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:53,421 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:53,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-10-15 16:17:53,624 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:53,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:53,624 INFO L82 PathProgramCache]: Analyzing trace with hash -770025043, now seen corresponding path program 159 times [2020-10-15 16:17:53,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:53,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354197956] [2020-10-15 16:17:53,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:53,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354197956] [2020-10-15 16:17:53,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990541772] [2020-10-15 16:17:53,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:53,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:17:53,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:53,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:53,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:54,118 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:17:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:54,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:54,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:54,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503037728] [2020-10-15 16:17:54,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:54,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:54,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:54,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:54,168 INFO L87 Difference]: Start difference. First operand 162 states and 400 transitions. Second operand 17 states. [2020-10-15 16:17:55,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:55,491 INFO L93 Difference]: Finished difference Result 260 states and 621 transitions. [2020-10-15 16:17:55,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:17:55,492 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:55,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:55,493 INFO L225 Difference]: With dead ends: 260 [2020-10-15 16:17:55,493 INFO L226 Difference]: Without dead ends: 255 [2020-10-15 16:17:55,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:17:55,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-15 16:17:55,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 160. [2020-10-15 16:17:55,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:17:55,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2020-10-15 16:17:55,497 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 14 [2020-10-15 16:17:55,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:55,498 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2020-10-15 16:17:55,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:55,498 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2020-10-15 16:17:55,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:55,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:55,499 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:55,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:55,707 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:55,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:55,708 INFO L82 PathProgramCache]: Analyzing trace with hash -763589443, now seen corresponding path program 160 times [2020-10-15 16:17:55,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:55,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353530174] [2020-10-15 16:17:55,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:55,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353530174] [2020-10-15 16:17:55,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134103899] [2020-10-15 16:17:55,814 INFO L93 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:55,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:55,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:55,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:55,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:56,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:56,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:56,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075043318] [2020-10-15 16:17:56,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:56,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:56,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:56,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:56,119 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 17 states. [2020-10-15 16:17:56,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:56,604 INFO L93 Difference]: Finished difference Result 235 states and 543 transitions. [2020-10-15 16:17:56,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:17:56,605 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:56,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:56,605 INFO L225 Difference]: With dead ends: 235 [2020-10-15 16:17:56,605 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:17:56,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:17:56,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:17:56,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-10-15 16:17:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:17:56,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 401 transitions. [2020-10-15 16:17:56,609 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 401 transitions. Word has length 14 [2020-10-15 16:17:56,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:56,609 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 401 transitions. [2020-10-15 16:17:56,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:56,609 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 401 transitions. [2020-10-15 16:17:56,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:56,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:56,610 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:56,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:56,810 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:56,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:56,811 INFO L82 PathProgramCache]: Analyzing trace with hash -763588482, now seen corresponding path program 161 times [2020-10-15 16:17:56,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:56,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152442475] [2020-10-15 16:17:56,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:56,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152442475] [2020-10-15 16:17:56,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948463758] [2020-10-15 16:17:56,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:56,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:56,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:56,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:56,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:01,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:01,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:01,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89229293] [2020-10-15 16:18:01,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:01,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:01,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:01,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:18:01,094 INFO L87 Difference]: Start difference. First operand 163 states and 401 transitions. Second operand 17 states. [2020-10-15 16:18:05,436 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:18:11,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:11,828 INFO L93 Difference]: Finished difference Result 241 states and 556 transitions. [2020-10-15 16:18:11,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:18:11,829 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:11,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:11,829 INFO L225 Difference]: With dead ends: 241 [2020-10-15 16:18:11,829 INFO L226 Difference]: Without dead ends: 239 [2020-10-15 16:18:11,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=193, Invalid=508, Unknown=1, NotChecked=0, Total=702 [2020-10-15 16:18:11,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-15 16:18:11,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-15 16:18:11,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:18:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 400 transitions. [2020-10-15 16:18:11,833 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 400 transitions. Word has length 14 [2020-10-15 16:18:11,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:11,833 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 400 transitions. [2020-10-15 16:18:11,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:11,833 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 400 transitions. [2020-10-15 16:18:11,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:11,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:11,834 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:12,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-10-15 16:18:12,034 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:12,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:12,035 INFO L82 PathProgramCache]: Analyzing trace with hash -763559652, now seen corresponding path program 162 times [2020-10-15 16:18:12,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:12,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255514297] [2020-10-15 16:18:12,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:12,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:12,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255514297] [2020-10-15 16:18:12,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154220906] [2020-10-15 16:18:12,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:12,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:18:12,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:12,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:12,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:12,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:12,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:12,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234885490] [2020-10-15 16:18:12,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:12,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:12,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:12,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:12,511 INFO L87 Difference]: Start difference. First operand 163 states and 400 transitions. Second operand 17 states. [2020-10-15 16:18:13,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:13,033 INFO L93 Difference]: Finished difference Result 235 states and 546 transitions. [2020-10-15 16:18:13,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:18:13,034 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:13,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:13,035 INFO L225 Difference]: With dead ends: 235 [2020-10-15 16:18:13,035 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:18:13,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:18:13,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:18:13,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-15 16:18:13,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:18:13,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-15 16:18:13,038 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-15 16:18:13,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:13,038 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-15 16:18:13,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:13,038 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-15 16:18:13,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:13,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:13,039 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:13,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:13,239 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:13,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:13,240 INFO L82 PathProgramCache]: Analyzing trace with hash -743033653, now seen corresponding path program 163 times [2020-10-15 16:18:13,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:13,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059110324] [2020-10-15 16:18:13,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:13,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:13,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059110324] [2020-10-15 16:18:13,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752284881] [2020-10-15 16:18:13,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:13,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:13,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:13,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:13,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:13,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299832565] [2020-10-15 16:18:13,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:13,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:13,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:13,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:13,682 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-15 16:18:14,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:14,511 INFO L93 Difference]: Finished difference Result 254 states and 587 transitions. [2020-10-15 16:18:14,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:18:14,513 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:14,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:14,513 INFO L225 Difference]: With dead ends: 254 [2020-10-15 16:18:14,513 INFO L226 Difference]: Without dead ends: 252 [2020-10-15 16:18:14,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:18:14,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-15 16:18:14,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 164. [2020-10-15 16:18:14,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:18:14,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 405 transitions. [2020-10-15 16:18:14,517 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 405 transitions. Word has length 14 [2020-10-15 16:18:14,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:14,517 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 405 transitions. [2020-10-15 16:18:14,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:14,517 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 405 transitions. [2020-10-15 16:18:14,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:14,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:14,518 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:14,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2020-10-15 16:18:14,718 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:14,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:14,719 INFO L82 PathProgramCache]: Analyzing trace with hash -743032692, now seen corresponding path program 164 times [2020-10-15 16:18:14,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:14,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583253466] [2020-10-15 16:18:14,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:14,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583253466] [2020-10-15 16:18:14,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199485785] [2020-10-15 16:18:14,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:14,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:18:14,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:14,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:14,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:15,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:15,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:15,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040736974] [2020-10-15 16:18:15,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:15,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:15,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:15,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:15,973 INFO L87 Difference]: Start difference. First operand 164 states and 405 transitions. Second operand 17 states. [2020-10-15 16:18:20,423 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:18:35,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:35,205 INFO L93 Difference]: Finished difference Result 264 states and 610 transitions. [2020-10-15 16:18:35,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:18:35,206 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:35,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:35,207 INFO L225 Difference]: With dead ends: 264 [2020-10-15 16:18:35,207 INFO L226 Difference]: Without dead ends: 262 [2020-10-15 16:18:35,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=289, Invalid=699, Unknown=4, NotChecked=0, Total=992 [2020-10-15 16:18:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-15 16:18:35,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 165. [2020-10-15 16:18:35,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:18:35,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-15 16:18:35,210 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-15 16:18:35,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:35,210 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-15 16:18:35,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:35,211 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-15 16:18:35,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:35,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:35,211 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:35,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:35,412 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:35,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:35,412 INFO L82 PathProgramCache]: Analyzing trace with hash -742370563, now seen corresponding path program 165 times [2020-10-15 16:18:35,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:35,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982433113] [2020-10-15 16:18:35,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:35,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982433113] [2020-10-15 16:18:35,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897357380] [2020-10-15 16:18:35,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:35,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:18:35,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:35,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:35,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:36,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:36,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:36,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018523707] [2020-10-15 16:18:36,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:36,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:36,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:36,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:36,335 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-15 16:18:37,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:37,122 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-10-15 16:18:37,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:18:37,123 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:37,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:37,124 INFO L225 Difference]: With dead ends: 255 [2020-10-15 16:18:37,124 INFO L226 Difference]: Without dead ends: 253 [2020-10-15 16:18:37,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:18:37,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-15 16:18:37,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-15 16:18:37,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:18:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 16:18:37,126 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 16:18:37,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:37,127 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 16:18:37,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:37,127 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 16:18:37,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:37,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:37,127 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:37,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:37,328 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:37,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:37,329 INFO L82 PathProgramCache]: Analyzing trace with hash -742349204, now seen corresponding path program 166 times [2020-10-15 16:18:37,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:37,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081770407] [2020-10-15 16:18:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:37,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081770407] [2020-10-15 16:18:37,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693657147] [2020-10-15 16:18:37,449 INFO L93 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:37,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:18:37,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:37,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:37,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:37,707 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:18:37,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:37,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:37,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:37,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840897865] [2020-10-15 16:18:37,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:37,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:37,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:37,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:37,765 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 16:18:38,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:38,834 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2020-10-15 16:18:38,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:18:38,836 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:38,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:38,836 INFO L225 Difference]: With dead ends: 256 [2020-10-15 16:18:38,836 INFO L226 Difference]: Without dead ends: 251 [2020-10-15 16:18:38,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:18:38,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-15 16:18:38,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 167. [2020-10-15 16:18:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:18:38,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 16:18:38,840 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 16:18:38,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:38,840 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 16:18:38,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 16:18:38,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:38,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:38,841 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:39,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-15 16:18:39,042 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:39,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:39,042 INFO L82 PathProgramCache]: Analyzing trace with hash -742348243, now seen corresponding path program 167 times [2020-10-15 16:18:39,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:39,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074591900] [2020-10-15 16:18:39,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:39,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074591900] [2020-10-15 16:18:39,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357472210] [2020-10-15 16:18:39,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:39,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:18:39,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:39,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:39,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:39,460 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:39,461 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:39,462 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:39,463 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:39,464 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:39,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:39,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:39,467 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:39,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:39,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:39,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724674154] [2020-10-15 16:18:39,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:39,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:39,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:39,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:39,544 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 16:18:40,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:40,808 INFO L93 Difference]: Finished difference Result 279 states and 667 transitions. [2020-10-15 16:18:40,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:18:40,809 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:40,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:40,810 INFO L225 Difference]: With dead ends: 279 [2020-10-15 16:18:40,810 INFO L226 Difference]: Without dead ends: 274 [2020-10-15 16:18:40,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:18:40,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-15 16:18:40,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 165. [2020-10-15 16:18:40,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:18:40,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-15 16:18:40,813 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-15 16:18:40,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:40,813 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-15 16:18:40,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:40,813 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-15 16:18:40,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:40,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:40,813 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:41,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-15 16:18:41,014 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:41,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:41,015 INFO L82 PathProgramCache]: Analyzing trace with hash -742340772, now seen corresponding path program 168 times [2020-10-15 16:18:41,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:41,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720743624] [2020-10-15 16:18:41,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:41,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720743624] [2020-10-15 16:18:41,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226155094] [2020-10-15 16:18:41,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:41,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:18:41,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:41,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:41,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:44,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:44,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:44,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824805518] [2020-10-15 16:18:44,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:44,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:44,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:44,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:18:44,854 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-15 16:18:49,255 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 16:18:53,519 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:18:54,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:54,212 INFO L93 Difference]: Finished difference Result 271 states and 639 transitions. [2020-10-15 16:18:54,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:18:54,213 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:54,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:54,213 INFO L225 Difference]: With dead ends: 271 [2020-10-15 16:18:54,214 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 16:18:54,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=348, Invalid=841, Unknown=1, NotChecked=0, Total=1190 [2020-10-15 16:18:54,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 16:18:54,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 167. [2020-10-15 16:18:54,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:18:54,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 16:18:54,218 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 16:18:54,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:54,218 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 16:18:54,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:54,219 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 16:18:54,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:54,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:54,219 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:54,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-15 16:18:54,426 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:54,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:54,426 INFO L82 PathProgramCache]: Analyzing trace with hash -742319413, now seen corresponding path program 169 times [2020-10-15 16:18:54,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:54,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882388079] [2020-10-15 16:18:54,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:54,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882388079] [2020-10-15 16:18:54,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551259570] [2020-10-15 16:18:54,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:54,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:54,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:01,391 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-10-15 16:19:01,395 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:19:01,400 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:19:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:01,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:01,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:01,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209847382] [2020-10-15 16:19:01,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:01,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:01,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:01,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=180, Unknown=5, NotChecked=0, Total=272 [2020-10-15 16:19:01,465 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 16:19:05,851 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 16:19:06,500 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-10-15 16:19:10,640 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-15 16:19:18,178 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-15 16:19:21,465 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-15 16:19:26,675 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-15 16:19:32,136 WARN L193 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-15 16:19:32,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:32,396 INFO L93 Difference]: Finished difference Result 299 states and 714 transitions. [2020-10-15 16:19:32,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:19:32,397 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:32,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:32,398 INFO L225 Difference]: With dead ends: 299 [2020-10-15 16:19:32,398 INFO L226 Difference]: Without dead ends: 291 [2020-10-15 16:19:32,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=434, Invalid=965, Unknown=7, NotChecked=0, Total=1406 [2020-10-15 16:19:32,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-15 16:19:32,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 168. [2020-10-15 16:19:32,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-15 16:19:32,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 421 transitions. [2020-10-15 16:19:32,402 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 421 transitions. Word has length 14 [2020-10-15 16:19:32,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:32,402 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 421 transitions. [2020-10-15 16:19:32,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:32,402 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 421 transitions. [2020-10-15 16:19:32,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:32,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:32,403 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:32,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-10-15 16:19:32,603 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:32,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:32,604 INFO L82 PathProgramCache]: Analyzing trace with hash -742318452, now seen corresponding path program 170 times [2020-10-15 16:19:32,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:32,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823416328] [2020-10-15 16:19:32,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:32,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823416328] [2020-10-15 16:19:32,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281091599] [2020-10-15 16:19:32,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:32,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:19:32,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:32,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:32,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:35,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:19:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:35,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:35,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:35,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834840242] [2020-10-15 16:19:35,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:35,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:35,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:35,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:19:35,174 INFO L87 Difference]: Start difference. First operand 168 states and 421 transitions. Second operand 17 states. [2020-10-15 16:19:37,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:37,167 INFO L93 Difference]: Finished difference Result 292 states and 701 transitions. [2020-10-15 16:19:37,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:19:37,168 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:37,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:37,169 INFO L225 Difference]: With dead ends: 292 [2020-10-15 16:19:37,169 INFO L226 Difference]: Without dead ends: 284 [2020-10-15 16:19:37,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=425, Invalid=980, Unknown=1, NotChecked=0, Total=1406 [2020-10-15 16:19:37,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-15 16:19:37,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 162. [2020-10-15 16:19:37,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:19:37,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-15 16:19:37,173 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-15 16:19:37,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:37,173 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-15 16:19:37,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:37,173 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-15 16:19:37,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:37,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:37,173 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:37,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-15 16:19:37,374 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:37,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:37,375 INFO L82 PathProgramCache]: Analyzing trace with hash -742110132, now seen corresponding path program 171 times [2020-10-15 16:19:37,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:37,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867027626] [2020-10-15 16:19:37,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:37,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867027626] [2020-10-15 16:19:37,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250288295] [2020-10-15 16:19:37,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:37,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:19:37,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:37,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:37,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:37,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:37,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:37,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625154700] [2020-10-15 16:19:37,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:37,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:37,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:37,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:37,997 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-15 16:19:38,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:38,674 INFO L93 Difference]: Finished difference Result 231 states and 545 transitions. [2020-10-15 16:19:38,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:19:38,675 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:38,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:38,675 INFO L225 Difference]: With dead ends: 231 [2020-10-15 16:19:38,675 INFO L226 Difference]: Without dead ends: 229 [2020-10-15 16:19:38,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:19:38,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-15 16:19:38,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2020-10-15 16:19:38,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:19:38,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-15 16:19:38,683 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-15 16:19:38,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:38,683 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-15 16:19:38,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:38,683 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-15 16:19:38,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:38,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:38,684 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:38,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2020-10-15 16:19:38,893 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:38,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:38,893 INFO L82 PathProgramCache]: Analyzing trace with hash -741447042, now seen corresponding path program 172 times [2020-10-15 16:19:38,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:38,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119417347] [2020-10-15 16:19:38,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:38,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:39,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119417347] [2020-10-15 16:19:39,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835536900] [2020-10-15 16:19:39,039 INFO L93 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:39,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:19:39,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:39,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:39,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:39,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:39,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:39,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123346479] [2020-10-15 16:19:39,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:39,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:39,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:39,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:39,423 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-15 16:19:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:40,465 INFO L93 Difference]: Finished difference Result 250 states and 594 transitions. [2020-10-15 16:19:40,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:19:40,467 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:40,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:40,467 INFO L225 Difference]: With dead ends: 250 [2020-10-15 16:19:40,467 INFO L226 Difference]: Without dead ends: 248 [2020-10-15 16:19:40,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:19:40,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-15 16:19:40,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 163. [2020-10-15 16:19:40,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:19:40,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 405 transitions. [2020-10-15 16:19:40,472 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 405 transitions. Word has length 14 [2020-10-15 16:19:40,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:40,472 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 405 transitions. [2020-10-15 16:19:40,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:40,472 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 405 transitions. [2020-10-15 16:19:40,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:40,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:40,473 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:40,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:40,673 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:40,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:40,674 INFO L82 PathProgramCache]: Analyzing trace with hash -741424722, now seen corresponding path program 173 times [2020-10-15 16:19:40,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:40,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179184989] [2020-10-15 16:19:40,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:40,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179184989] [2020-10-15 16:19:40,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031222895] [2020-10-15 16:19:40,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:40,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:19:40,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:40,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:40,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:41,141 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:19:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:41,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:41,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:41,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382979771] [2020-10-15 16:19:41,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:41,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:41,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:41,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:41,183 INFO L87 Difference]: Start difference. First operand 163 states and 405 transitions. Second operand 17 states. [2020-10-15 16:19:42,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:42,778 INFO L93 Difference]: Finished difference Result 288 states and 686 transitions. [2020-10-15 16:19:42,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:19:42,779 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:42,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:42,780 INFO L225 Difference]: With dead ends: 288 [2020-10-15 16:19:42,780 INFO L226 Difference]: Without dead ends: 283 [2020-10-15 16:19:42,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:19:42,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-15 16:19:42,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 159. [2020-10-15 16:19:42,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 16:19:42,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 388 transitions. [2020-10-15 16:19:42,784 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 388 transitions. Word has length 14 [2020-10-15 16:19:42,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:42,784 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 388 transitions. [2020-10-15 16:19:42,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:42,784 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 388 transitions. [2020-10-15 16:19:42,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:42,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:42,784 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:42,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-10-15 16:19:42,985 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:42,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:42,986 INFO L82 PathProgramCache]: Analyzing trace with hash -541944403, now seen corresponding path program 174 times [2020-10-15 16:19:42,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:42,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869108900] [2020-10-15 16:19:42,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:43,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:43,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869108900] [2020-10-15 16:19:43,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111220016] [2020-10-15 16:19:43,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:43,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:19:43,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:43,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:43,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:43,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:43,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:43,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353320944] [2020-10-15 16:19:43,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:43,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:43,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:43,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:43,459 INFO L87 Difference]: Start difference. First operand 159 states and 388 transitions. Second operand 17 states. [2020-10-15 16:19:44,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:44,036 INFO L93 Difference]: Finished difference Result 236 states and 544 transitions. [2020-10-15 16:19:44,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:19:44,037 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:44,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:44,038 INFO L225 Difference]: With dead ends: 236 [2020-10-15 16:19:44,038 INFO L226 Difference]: Without dead ends: 234 [2020-10-15 16:19:44,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:19:44,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-15 16:19:44,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-10-15 16:19:44,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:19:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 16:19:44,042 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 16:19:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:44,042 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 16:19:44,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 16:19:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:44,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:44,043 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:44,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:44,244 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:44,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:44,244 INFO L82 PathProgramCache]: Analyzing trace with hash -541943442, now seen corresponding path program 175 times [2020-10-15 16:19:44,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:44,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168744994] [2020-10-15 16:19:44,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:44,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168744994] [2020-10-15 16:19:44,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502471519] [2020-10-15 16:19:44,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:44,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:44,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:44,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:44,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:44,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122027905] [2020-10-15 16:19:44,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:44,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:44,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:44,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:44,743 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 16:19:45,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:45,345 INFO L93 Difference]: Finished difference Result 246 states and 565 transitions. [2020-10-15 16:19:45,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:19:45,346 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:45,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:45,347 INFO L225 Difference]: With dead ends: 246 [2020-10-15 16:19:45,347 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 16:19:45,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:19:45,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 16:19:45,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 163. [2020-10-15 16:19:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:19:45,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 16:19:45,351 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 16:19:45,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:45,351 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 16:19:45,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:45,351 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 16:19:45,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:45,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:45,352 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:45,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:45,552 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:45,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:45,553 INFO L82 PathProgramCache]: Analyzing trace with hash -541914612, now seen corresponding path program 176 times [2020-10-15 16:19:45,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:45,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311446874] [2020-10-15 16:19:45,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:45,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311446874] [2020-10-15 16:19:45,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431167088] [2020-10-15 16:19:45,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:45,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:19:45,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:45,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:45,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:46,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:46,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:46,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911049501] [2020-10-15 16:19:46,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:46,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:46,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:46,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:46,004 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 16:19:46,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:46,530 INFO L93 Difference]: Finished difference Result 239 states and 554 transitions. [2020-10-15 16:19:46,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:19:46,532 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:46,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:46,532 INFO L225 Difference]: With dead ends: 239 [2020-10-15 16:19:46,532 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 16:19:46,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:19:46,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 16:19:46,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-15 16:19:46,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:19:46,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 16:19:46,536 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 16:19:46,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:46,536 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 16:19:46,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:46,536 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 16:19:46,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:46,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:46,536 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:46,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:46,737 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:46,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:46,738 INFO L82 PathProgramCache]: Analyzing trace with hash -540990130, now seen corresponding path program 177 times [2020-10-15 16:19:46,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:46,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106388383] [2020-10-15 16:19:46,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:46,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106388383] [2020-10-15 16:19:46,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846646609] [2020-10-15 16:19:46,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:46,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:19:46,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:46,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:46,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:47,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:47,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:47,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:47,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488306651] [2020-10-15 16:19:47,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:47,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:47,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:47,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:47,213 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 16:19:47,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:47,719 INFO L93 Difference]: Finished difference Result 229 states and 529 transitions. [2020-10-15 16:19:47,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:19:47,720 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:47,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:47,721 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:19:47,721 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:19:47,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:19:47,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:19:47,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-15 16:19:47,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 16:19:47,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-15 16:19:47,724 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-15 16:19:47,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:47,724 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-15 16:19:47,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:47,725 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-15 16:19:47,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:47,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:47,725 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:47,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-15 16:19:47,926 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:47,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:47,926 INFO L82 PathProgramCache]: Analyzing trace with hash 95285087, now seen corresponding path program 178 times [2020-10-15 16:19:47,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:47,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414230109] [2020-10-15 16:19:47,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:48,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414230109] [2020-10-15 16:19:48,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103823758] [2020-10-15 16:19:48,069 INFO L93 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:48,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:19:48,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:48,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:48,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:48,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:48,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:48,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047178622] [2020-10-15 16:19:48,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:48,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:48,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:48,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:48,379 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-15 16:19:49,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:49,375 INFO L93 Difference]: Finished difference Result 261 states and 599 transitions. [2020-10-15 16:19:49,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:19:49,377 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:49,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:49,378 INFO L225 Difference]: With dead ends: 261 [2020-10-15 16:19:49,378 INFO L226 Difference]: Without dead ends: 259 [2020-10-15 16:19:49,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:19:49,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-15 16:19:49,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 164. [2020-10-15 16:19:49,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:19:49,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 406 transitions. [2020-10-15 16:19:49,382 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 406 transitions. Word has length 14 [2020-10-15 16:19:49,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:49,382 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 406 transitions. [2020-10-15 16:19:49,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:49,382 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 406 transitions. [2020-10-15 16:19:49,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:49,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:49,383 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:49,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:49,583 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:49,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:49,584 INFO L82 PathProgramCache]: Analyzing trace with hash 95286048, now seen corresponding path program 179 times [2020-10-15 16:19:49,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:49,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261250596] [2020-10-15 16:19:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:49,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261250596] [2020-10-15 16:19:49,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860974516] [2020-10-15 16:19:49,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:49,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:19:49,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:49,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:49,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:50,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:50,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:50,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188817435] [2020-10-15 16:19:50,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:50,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:50,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:50,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:50,054 INFO L87 Difference]: Start difference. First operand 164 states and 406 transitions. Second operand 17 states. [2020-10-15 16:19:50,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:51,000 INFO L93 Difference]: Finished difference Result 271 states and 622 transitions. [2020-10-15 16:19:51,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:19:51,001 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:51,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:51,002 INFO L225 Difference]: With dead ends: 271 [2020-10-15 16:19:51,002 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 16:19:51,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:19:51,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 16:19:51,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2020-10-15 16:19:51,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:19:51,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2020-10-15 16:19:51,006 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 14 [2020-10-15 16:19:51,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:51,006 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 413 transitions. [2020-10-15 16:19:51,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:51,006 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 413 transitions. [2020-10-15 16:19:51,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:51,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:51,007 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:51,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-15 16:19:51,214 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:51,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:51,215 INFO L82 PathProgramCache]: Analyzing trace with hash 95314878, now seen corresponding path program 180 times [2020-10-15 16:19:51,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:51,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288741094] [2020-10-15 16:19:51,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:51,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:51,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288741094] [2020-10-15 16:19:51,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474467602] [2020-10-15 16:19:51,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:51,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:19:51,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:51,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:51,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:51,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:51,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:51,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571125732] [2020-10-15 16:19:51,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:51,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:51,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:51,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:51,615 INFO L87 Difference]: Start difference. First operand 166 states and 413 transitions. Second operand 17 states. [2020-10-15 16:19:52,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:52,406 INFO L93 Difference]: Finished difference Result 253 states and 588 transitions. [2020-10-15 16:19:52,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:19:52,408 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:52,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:52,409 INFO L225 Difference]: With dead ends: 253 [2020-10-15 16:19:52,409 INFO L226 Difference]: Without dead ends: 251 [2020-10-15 16:19:52,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=274, Invalid=718, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:19:52,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-15 16:19:52,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2020-10-15 16:19:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:19:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-15 16:19:52,413 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-15 16:19:52,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:52,413 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-15 16:19:52,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:52,413 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-15 16:19:52,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:52,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:52,414 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:52,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-15 16:19:52,614 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:52,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:52,615 INFO L82 PathProgramCache]: Analyzing trace with hash 115840877, now seen corresponding path program 181 times [2020-10-15 16:19:52,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:52,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724626037] [2020-10-15 16:19:52,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:52,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724626037] [2020-10-15 16:19:52,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267229793] [2020-10-15 16:19:52,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:52,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:52,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:53,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:53,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:53,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045646769] [2020-10-15 16:19:53,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:53,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:53,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:53,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:53,083 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-15 16:19:54,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:54,189 INFO L93 Difference]: Finished difference Result 268 states and 622 transitions. [2020-10-15 16:19:54,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:19:54,191 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:54,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:54,192 INFO L225 Difference]: With dead ends: 268 [2020-10-15 16:19:54,192 INFO L226 Difference]: Without dead ends: 266 [2020-10-15 16:19:54,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:19:54,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-15 16:19:54,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 167. [2020-10-15 16:19:54,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:19:54,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 16:19:54,196 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 16:19:54,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:54,196 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 16:19:54,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:54,196 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 16:19:54,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:54,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:54,196 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:54,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:54,397 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:54,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:54,398 INFO L82 PathProgramCache]: Analyzing trace with hash 115841838, now seen corresponding path program 182 times [2020-10-15 16:19:54,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:54,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110568642] [2020-10-15 16:19:54,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:54,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110568642] [2020-10-15 16:19:54,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511848853] [2020-10-15 16:19:54,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:54,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:19:54,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:54,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:54,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:54,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:54,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:54,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816853235] [2020-10-15 16:19:54,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:54,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:54,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:54,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:54,859 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 16:19:55,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:55,996 INFO L93 Difference]: Finished difference Result 271 states and 630 transitions. [2020-10-15 16:19:55,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:19:55,998 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:55,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:55,999 INFO L225 Difference]: With dead ends: 271 [2020-10-15 16:19:55,999 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 16:19:55,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:19:56,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 16:19:56,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-15 16:19:56,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:19:56,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-15 16:19:56,003 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-15 16:19:56,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:56,003 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-15 16:19:56,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:56,003 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-15 16:19:56,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:56,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:56,003 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:56,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-15 16:19:56,204 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:56,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:56,205 INFO L82 PathProgramCache]: Analyzing trace with hash 116503967, now seen corresponding path program 183 times [2020-10-15 16:19:56,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:56,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39809282] [2020-10-15 16:19:56,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:56,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39809282] [2020-10-15 16:19:56,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148889656] [2020-10-15 16:19:56,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:56,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:19:56,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:56,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:56,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:56,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:56,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:56,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76179109] [2020-10-15 16:19:56,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:56,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:56,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:56,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:56,669 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-10-15 16:19:57,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:57,713 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2020-10-15 16:19:57,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:19:57,715 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:57,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:57,716 INFO L225 Difference]: With dead ends: 262 [2020-10-15 16:19:57,716 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 16:19:57,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=408, Invalid=924, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:19:57,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 16:19:57,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 171. [2020-10-15 16:19:57,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 16:19:57,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 16:19:57,719 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 16:19:57,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:57,719 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 16:19:57,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:57,719 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 16:19:57,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:57,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:57,720 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:57,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2020-10-15 16:19:57,921 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:57,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:57,921 INFO L82 PathProgramCache]: Analyzing trace with hash 116525326, now seen corresponding path program 184 times [2020-10-15 16:19:57,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:57,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990105382] [2020-10-15 16:19:57,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:58,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990105382] [2020-10-15 16:19:58,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285673428] [2020-10-15 16:19:58,077 INFO L93 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:58,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:19:58,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:58,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:58,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:58,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:19:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:58,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:58,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:58,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790958930] [2020-10-15 16:19:58,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:58,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:58,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:58,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:58,361 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 16:19:59,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:59,366 INFO L93 Difference]: Finished difference Result 248 states and 600 transitions. [2020-10-15 16:19:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:19:59,367 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:59,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:59,368 INFO L225 Difference]: With dead ends: 248 [2020-10-15 16:19:59,368 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 16:19:59,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:19:59,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 16:19:59,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2020-10-15 16:19:59,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 16:19:59,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 16:19:59,373 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 16:19:59,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:59,373 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 16:19:59,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:59,373 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 16:19:59,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:59,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:59,374 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:59,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:59,574 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:59,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:59,575 INFO L82 PathProgramCache]: Analyzing trace with hash 116526287, now seen corresponding path program 185 times [2020-10-15 16:19:59,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:59,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249509540] [2020-10-15 16:19:59,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:59,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249509540] [2020-10-15 16:19:59,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574699976] [2020-10-15 16:19:59,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:59,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:19:59,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:59,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:59,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:59,977 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:20:00,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:00,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:00,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:00,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467720426] [2020-10-15 16:20:00,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:00,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:00,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:00,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:00,042 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 16:20:01,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:01,394 INFO L93 Difference]: Finished difference Result 287 states and 694 transitions. [2020-10-15 16:20:01,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:20:01,396 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:01,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:01,396 INFO L225 Difference]: With dead ends: 287 [2020-10-15 16:20:01,396 INFO L226 Difference]: Without dead ends: 282 [2020-10-15 16:20:01,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:20:01,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-15 16:20:01,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 169. [2020-10-15 16:20:01,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:20:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-15 16:20:01,401 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-15 16:20:01,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:01,401 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-15 16:20:01,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:01,401 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-15 16:20:01,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:01,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:01,402 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:01,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:01,603 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:01,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:01,603 INFO L82 PathProgramCache]: Analyzing trace with hash 116533758, now seen corresponding path program 186 times [2020-10-15 16:20:01,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:01,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816939436] [2020-10-15 16:20:01,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:01,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:01,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816939436] [2020-10-15 16:20:01,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245501384] [2020-10-15 16:20:01,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:01,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:20:01,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:01,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:01,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:02,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:02,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:02,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55250020] [2020-10-15 16:20:02,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:02,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:02,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:02,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:02,423 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-10-15 16:20:04,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:04,280 INFO L93 Difference]: Finished difference Result 284 states and 678 transitions. [2020-10-15 16:20:04,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:20:04,282 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:04,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:04,283 INFO L225 Difference]: With dead ends: 284 [2020-10-15 16:20:04,283 INFO L226 Difference]: Without dead ends: 282 [2020-10-15 16:20:04,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:20:04,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-15 16:20:04,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 171. [2020-10-15 16:20:04,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 16:20:04,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 16:20:04,287 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 16:20:04,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:04,287 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 16:20:04,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:04,287 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 16:20:04,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:04,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:04,288 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:04,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:04,489 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:04,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:04,489 INFO L82 PathProgramCache]: Analyzing trace with hash 116555117, now seen corresponding path program 187 times [2020-10-15 16:20:04,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:04,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218325049] [2020-10-15 16:20:04,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:04,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218325049] [2020-10-15 16:20:04,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678292349] [2020-10-15 16:20:04,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:04,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:04,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:05,040 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:20:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:05,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:05,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:05,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366342865] [2020-10-15 16:20:05,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:05,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:05,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:05,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:05,109 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 16:20:06,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:06,723 INFO L93 Difference]: Finished difference Result 289 states and 702 transitions. [2020-10-15 16:20:06,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:20:06,725 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:06,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:06,725 INFO L225 Difference]: With dead ends: 289 [2020-10-15 16:20:06,726 INFO L226 Difference]: Without dead ends: 284 [2020-10-15 16:20:06,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:20:06,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-15 16:20:06,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 172. [2020-10-15 16:20:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-15 16:20:06,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2020-10-15 16:20:06,729 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 14 [2020-10-15 16:20:06,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:06,730 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2020-10-15 16:20:06,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:06,730 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2020-10-15 16:20:06,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:06,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:06,730 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:06,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:06,931 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:06,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:06,932 INFO L82 PathProgramCache]: Analyzing trace with hash 116556078, now seen corresponding path program 188 times [2020-10-15 16:20:06,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:06,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962690039] [2020-10-15 16:20:06,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:07,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962690039] [2020-10-15 16:20:07,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516887194] [2020-10-15 16:20:07,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:07,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:20:07,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:07,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:07,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:07,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:20:07,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:07,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:07,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:07,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497013928] [2020-10-15 16:20:07,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:07,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:07,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:07,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:07,392 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand 17 states. [2020-10-15 16:20:09,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:09,163 INFO L93 Difference]: Finished difference Result 312 states and 753 transitions. [2020-10-15 16:20:09,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:20:09,164 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:09,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:09,165 INFO L225 Difference]: With dead ends: 312 [2020-10-15 16:20:09,165 INFO L226 Difference]: Without dead ends: 304 [2020-10-15 16:20:09,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:20:09,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-15 16:20:09,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 165. [2020-10-15 16:20:09,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:20:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-15 16:20:09,169 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-15 16:20:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:09,169 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-15 16:20:09,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:09,169 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-15 16:20:09,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:09,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:09,169 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:09,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:09,370 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:09,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:09,371 INFO L82 PathProgramCache]: Analyzing trace with hash 116764398, now seen corresponding path program 189 times [2020-10-15 16:20:09,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:09,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224892219] [2020-10-15 16:20:09,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:09,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224892219] [2020-10-15 16:20:09,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746814891] [2020-10-15 16:20:09,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:09,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:20:09,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:09,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:09,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:09,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:09,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:09,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940470866] [2020-10-15 16:20:09,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:09,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:09,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:09,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:09,808 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-15 16:20:10,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:10,820 INFO L93 Difference]: Finished difference Result 262 states and 617 transitions. [2020-10-15 16:20:10,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:20:10,821 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:10,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:10,822 INFO L225 Difference]: With dead ends: 262 [2020-10-15 16:20:10,822 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 16:20:10,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:20:10,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 16:20:10,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 167. [2020-10-15 16:20:10,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:20:10,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 16:20:10,826 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 16:20:10,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:10,826 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 16:20:10,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:10,826 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 16:20:10,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:10,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:10,826 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:11,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-15 16:20:11,027 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:11,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:11,028 INFO L82 PathProgramCache]: Analyzing trace with hash 117427488, now seen corresponding path program 190 times [2020-10-15 16:20:11,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:11,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290470019] [2020-10-15 16:20:11,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:11,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290470019] [2020-10-15 16:20:11,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088422513] [2020-10-15 16:20:11,175 INFO L93 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:11,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:20:11,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:11,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:11,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:11,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:11,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:11,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154318173] [2020-10-15 16:20:11,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:11,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:11,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:11,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:11,458 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 16:20:12,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:12,652 INFO L93 Difference]: Finished difference Result 271 states and 650 transitions. [2020-10-15 16:20:12,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:20:12,654 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:12,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:12,655 INFO L225 Difference]: With dead ends: 271 [2020-10-15 16:20:12,655 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 16:20:12,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=396, Invalid=936, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:20:12,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 16:20:12,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-15 16:20:12,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:20:12,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 16:20:12,658 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 16:20:12,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:12,658 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 16:20:12,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:12,658 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 16:20:12,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:12,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:12,659 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:12,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-15 16:20:12,860 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:12,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:12,860 INFO L82 PathProgramCache]: Analyzing trace with hash 117448847, now seen corresponding path program 191 times [2020-10-15 16:20:12,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:12,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553548811] [2020-10-15 16:20:12,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:13,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:13,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553548811] [2020-10-15 16:20:13,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553935510] [2020-10-15 16:20:13,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:13,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:20:13,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:13,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:13,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:13,261 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:20:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:13,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:13,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:13,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880173907] [2020-10-15 16:20:13,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:13,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:13,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:13,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:13,281 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 16:20:14,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:14,735 INFO L93 Difference]: Finished difference Result 296 states and 714 transitions. [2020-10-15 16:20:14,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:20:14,737 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:14,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:14,737 INFO L225 Difference]: With dead ends: 296 [2020-10-15 16:20:14,738 INFO L226 Difference]: Without dead ends: 288 [2020-10-15 16:20:14,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:20:14,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-15 16:20:14,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 171. [2020-10-15 16:20:14,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 16:20:14,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-10-15 16:20:14,741 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-10-15 16:20:14,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:14,742 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-10-15 16:20:14,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:14,742 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-10-15 16:20:14,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:14,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:14,742 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:14,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-10-15 16:20:14,943 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:14,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:14,943 INFO L82 PathProgramCache]: Analyzing trace with hash 117449808, now seen corresponding path program 192 times [2020-10-15 16:20:14,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:14,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993397659] [2020-10-15 16:20:14,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:15,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993397659] [2020-10-15 16:20:15,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750110601] [2020-10-15 16:20:15,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:15,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:20:15,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:15,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:15,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:15,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:20:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:15,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:15,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:15,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093397706] [2020-10-15 16:20:15,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:15,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:15,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:15,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:15,367 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-10-15 16:20:16,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:16,668 INFO L93 Difference]: Finished difference Result 298 states and 732 transitions. [2020-10-15 16:20:16,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:20:16,670 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:16,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:16,671 INFO L225 Difference]: With dead ends: 298 [2020-10-15 16:20:16,671 INFO L226 Difference]: Without dead ends: 290 [2020-10-15 16:20:16,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:20:16,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-15 16:20:16,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-10-15 16:20:16,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:20:16,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 429 transitions. [2020-10-15 16:20:16,675 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 429 transitions. Word has length 14 [2020-10-15 16:20:16,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:16,675 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 429 transitions. [2020-10-15 16:20:16,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:16,675 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 429 transitions. [2020-10-15 16:20:16,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:16,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:16,676 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:16,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-15 16:20:16,876 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:16,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:16,877 INFO L82 PathProgramCache]: Analyzing trace with hash 117478638, now seen corresponding path program 193 times [2020-10-15 16:20:16,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:16,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520448248] [2020-10-15 16:20:16,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:17,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520448248] [2020-10-15 16:20:17,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103858580] [2020-10-15 16:20:17,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:17,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:17,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:17,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:20:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:17,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:17,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:17,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634331037] [2020-10-15 16:20:17,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:17,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:17,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:17,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:17,360 INFO L87 Difference]: Start difference. First operand 169 states and 429 transitions. Second operand 17 states. [2020-10-15 16:20:18,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:18,943 INFO L93 Difference]: Finished difference Result 291 states and 709 transitions. [2020-10-15 16:20:18,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:20:18,945 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:18,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:18,946 INFO L225 Difference]: With dead ends: 291 [2020-10-15 16:20:18,946 INFO L226 Difference]: Without dead ends: 283 [2020-10-15 16:20:18,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:20:18,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-15 16:20:18,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 167. [2020-10-15 16:20:18,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:20:18,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 16:20:18,949 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 16:20:18,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:18,949 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 16:20:18,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:18,949 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 16:20:18,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:18,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:18,950 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:19,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2020-10-15 16:20:19,151 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:19,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:19,151 INFO L82 PathProgramCache]: Analyzing trace with hash 144470028, now seen corresponding path program 194 times [2020-10-15 16:20:19,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:19,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007942722] [2020-10-15 16:20:19,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:19,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007942722] [2020-10-15 16:20:19,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100881410] [2020-10-15 16:20:19,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:19,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:20:19,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:19,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:19,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:19,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:19,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:19,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539494702] [2020-10-15 16:20:19,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:19,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:19,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:19,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:19,620 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 16:20:21,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:21,084 INFO L93 Difference]: Finished difference Result 265 states and 622 transitions. [2020-10-15 16:20:21,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:20:21,086 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:21,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:21,086 INFO L225 Difference]: With dead ends: 265 [2020-10-15 16:20:21,087 INFO L226 Difference]: Without dead ends: 263 [2020-10-15 16:20:21,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:20:21,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-15 16:20:21,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 167. [2020-10-15 16:20:21,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:20:21,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 16:20:21,091 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 16:20:21,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:21,091 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 16:20:21,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:21,091 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 16:20:21,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:21,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:21,092 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:21,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:21,294 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:21,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:21,294 INFO L82 PathProgramCache]: Analyzing trace with hash 145133118, now seen corresponding path program 195 times [2020-10-15 16:20:21,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:21,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021908800] [2020-10-15 16:20:21,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:21,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021908800] [2020-10-15 16:20:21,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469958060] [2020-10-15 16:20:21,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:21,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:20:21,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:21,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:21,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:21,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:21,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:21,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953421454] [2020-10-15 16:20:21,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:21,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:21,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:21,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:21,896 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 16:20:23,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:23,451 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2020-10-15 16:20:23,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:20:23,453 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:23,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:23,454 INFO L225 Difference]: With dead ends: 262 [2020-10-15 16:20:23,454 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 16:20:23,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:20:23,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 16:20:23,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2020-10-15 16:20:23,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:20:23,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 16:20:23,458 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 16:20:23,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:23,458 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 16:20:23,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:23,458 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 16:20:23,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:23,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:23,459 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:23,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2020-10-15 16:20:23,660 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:23,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:23,660 INFO L82 PathProgramCache]: Analyzing trace with hash 145155438, now seen corresponding path program 196 times [2020-10-15 16:20:23,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:23,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824589464] [2020-10-15 16:20:23,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:23,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824589464] [2020-10-15 16:20:23,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35385925] [2020-10-15 16:20:23,821 INFO L93 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:23,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:20:23,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:23,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:23,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:24,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:20:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:24,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:24,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:24,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198239985] [2020-10-15 16:20:24,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:24,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:24,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:24,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:24,174 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 16:20:26,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:26,501 INFO L93 Difference]: Finished difference Result 285 states and 688 transitions. [2020-10-15 16:20:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:20:26,503 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:26,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:26,503 INFO L225 Difference]: With dead ends: 285 [2020-10-15 16:20:26,503 INFO L226 Difference]: Without dead ends: 280 [2020-10-15 16:20:26,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:20:26,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-15 16:20:26,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 167. [2020-10-15 16:20:26,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:20:26,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 16:20:26,506 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 16:20:26,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:26,507 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 16:20:26,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:26,507 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 16:20:26,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:26,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:26,507 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:26,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:26,708 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:26,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:26,709 INFO L82 PathProgramCache]: Analyzing trace with hash 145184268, now seen corresponding path program 197 times [2020-10-15 16:20:26,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:26,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638158415] [2020-10-15 16:20:26,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:26,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638158415] [2020-10-15 16:20:26,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487601265] [2020-10-15 16:20:26,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:26,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:20:26,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:26,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:26,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:31,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:20:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:33,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:33,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 16:20:33,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791084207] [2020-10-15 16:20:33,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:20:33,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:33,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:20:33,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=220, Unknown=3, NotChecked=0, Total=306 [2020-10-15 16:20:33,232 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 18 states. [2020-10-15 16:20:37,442 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-15 16:20:42,044 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-15 16:20:46,251 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2020-10-15 16:20:50,689 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-10-15 16:20:52,928 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-15 16:20:59,689 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-15 16:21:02,067 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-10-15 16:21:32,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:32,802 INFO L93 Difference]: Finished difference Result 302 states and 718 transitions. [2020-10-15 16:21:32,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:21:32,804 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 16:21:32,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:32,805 INFO L225 Difference]: With dead ends: 302 [2020-10-15 16:21:32,805 INFO L226 Difference]: Without dead ends: 297 [2020-10-15 16:21:32,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 41.2s TimeCoverageRelationStatistics Valid=565, Invalid=1408, Unknown=7, NotChecked=0, Total=1980 [2020-10-15 16:21:32,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-15 16:21:32,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 166. [2020-10-15 16:21:32,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:21:32,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 414 transitions. [2020-10-15 16:21:32,809 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 414 transitions. Word has length 14 [2020-10-15 16:21:32,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:32,809 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 414 transitions. [2020-10-15 16:21:32,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:21:32,809 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 414 transitions. [2020-10-15 16:21:32,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:32,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:32,810 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:33,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:33,011 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:33,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:33,011 INFO L82 PathProgramCache]: Analyzing trace with hash 146086430, now seen corresponding path program 198 times [2020-10-15 16:21:33,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:33,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591804277] [2020-10-15 16:21:33,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:33,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591804277] [2020-10-15 16:21:33,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626444218] [2020-10-15 16:21:33,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:33,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:21:33,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:33,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:33,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:33,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:33,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:33,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777344526] [2020-10-15 16:21:33,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:33,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:33,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:33,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:33,468 INFO L87 Difference]: Start difference. First operand 166 states and 414 transitions. Second operand 17 states. [2020-10-15 16:21:34,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:34,061 INFO L93 Difference]: Finished difference Result 219 states and 516 transitions. [2020-10-15 16:21:34,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:21:34,064 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:34,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:34,064 INFO L225 Difference]: With dead ends: 219 [2020-10-15 16:21:34,064 INFO L226 Difference]: Without dead ends: 217 [2020-10-15 16:21:34,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:21:34,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-15 16:21:34,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2020-10-15 16:21:34,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:21:34,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 16:21:34,068 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 16:21:34,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:34,068 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 16:21:34,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:34,068 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 16:21:34,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:34,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:34,068 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:34,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:34,269 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:34,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:34,270 INFO L82 PathProgramCache]: Analyzing trace with hash 146108750, now seen corresponding path program 199 times [2020-10-15 16:21:34,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:34,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944807255] [2020-10-15 16:21:34,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:34,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944807255] [2020-10-15 16:21:34,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586474716] [2020-10-15 16:21:34,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:34,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:34,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:34,731 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:21:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:34,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:34,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:34,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954058855] [2020-10-15 16:21:34,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:34,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:34,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:34,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:34,756 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 16:21:35,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:35,434 INFO L93 Difference]: Finished difference Result 229 states and 538 transitions. [2020-10-15 16:21:35,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:21:35,436 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:35,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:35,437 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:21:35,437 INFO L226 Difference]: Without dead ends: 224 [2020-10-15 16:21:35,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:21:35,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-15 16:21:35,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 158. [2020-10-15 16:21:35,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 16:21:35,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 386 transitions. [2020-10-15 16:21:35,441 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 386 transitions. Word has length 14 [2020-10-15 16:21:35,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:35,441 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 386 transitions. [2020-10-15 16:21:35,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:35,441 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 386 transitions. [2020-10-15 16:21:35,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:35,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:35,442 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:35,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-15 16:21:35,642 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:35,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:35,643 INFO L82 PathProgramCache]: Analyzing trace with hash 2034084541, now seen corresponding path program 200 times [2020-10-15 16:21:35,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:35,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117196535] [2020-10-15 16:21:35,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:35,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117196535] [2020-10-15 16:21:35,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808773320] [2020-10-15 16:21:35,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:35,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:21:35,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:35,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:35,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:36,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:36,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:36,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389697091] [2020-10-15 16:21:36,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:36,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:36,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:36,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:36,165 INFO L87 Difference]: Start difference. First operand 158 states and 386 transitions. Second operand 17 states. [2020-10-15 16:21:36,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:36,714 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-15 16:21:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:21:36,717 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:36,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:36,718 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:21:36,718 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:21:36,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:21:36,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:21:36,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-15 16:21:36,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 16:21:36,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-15 16:21:36,722 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-15 16:21:36,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:36,722 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-15 16:21:36,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:36,722 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-15 16:21:36,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:36,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:36,723 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:36,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-15 16:21:36,924 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:36,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:36,924 INFO L82 PathProgramCache]: Analyzing trace with hash 2034085502, now seen corresponding path program 201 times [2020-10-15 16:21:36,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:36,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026646300] [2020-10-15 16:21:36,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:37,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026646300] [2020-10-15 16:21:37,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291521907] [2020-10-15 16:21:37,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:37,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:21:37,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:37,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:37,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:37,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:37,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:37,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859086486] [2020-10-15 16:21:37,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:37,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:37,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:37,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:37,514 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-15 16:21:38,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:38,318 INFO L93 Difference]: Finished difference Result 237 states and 545 transitions. [2020-10-15 16:21:38,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:21:38,321 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:38,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:38,322 INFO L225 Difference]: With dead ends: 237 [2020-10-15 16:21:38,322 INFO L226 Difference]: Without dead ends: 235 [2020-10-15 16:21:38,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:21:38,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-15 16:21:38,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 160. [2020-10-15 16:21:38,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:21:38,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 392 transitions. [2020-10-15 16:21:38,325 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 392 transitions. Word has length 14 [2020-10-15 16:21:38,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:38,325 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 392 transitions. [2020-10-15 16:21:38,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:38,326 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 392 transitions. [2020-10-15 16:21:38,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:38,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:38,326 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:38,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-15 16:21:38,529 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:38,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:38,530 INFO L82 PathProgramCache]: Analyzing trace with hash 2034114332, now seen corresponding path program 202 times [2020-10-15 16:21:38,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:38,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656176381] [2020-10-15 16:21:38,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:38,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656176381] [2020-10-15 16:21:38,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322825729] [2020-10-15 16:21:38,714 INFO L93 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:38,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:21:38,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:38,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:38,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:39,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:39,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:39,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113935924] [2020-10-15 16:21:39,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:39,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:39,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:39,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:39,174 INFO L87 Difference]: Start difference. First operand 160 states and 392 transitions. Second operand 17 states. [2020-10-15 16:21:40,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:40,151 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-15 16:21:40,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:21:40,154 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:40,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:40,155 INFO L225 Difference]: With dead ends: 246 [2020-10-15 16:21:40,155 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 16:21:40,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:21:40,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 16:21:40,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 164. [2020-10-15 16:21:40,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:21:40,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 403 transitions. [2020-10-15 16:21:40,158 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 403 transitions. Word has length 14 [2020-10-15 16:21:40,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:40,158 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 403 transitions. [2020-10-15 16:21:40,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:40,158 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 403 transitions. [2020-10-15 16:21:40,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:40,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:40,159 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:40,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-15 16:21:40,360 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:40,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:40,360 INFO L82 PathProgramCache]: Analyzing trace with hash 2035009023, now seen corresponding path program 203 times [2020-10-15 16:21:40,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:40,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064773813] [2020-10-15 16:21:40,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:40,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064773813] [2020-10-15 16:21:40,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786447459] [2020-10-15 16:21:40,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:40,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:21:40,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:40,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:40,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:40,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:40,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:40,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:40,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587169931] [2020-10-15 16:21:40,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:40,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:40,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:40,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:40,890 INFO L87 Difference]: Start difference. First operand 164 states and 403 transitions. Second operand 17 states. [2020-10-15 16:21:41,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:41,521 INFO L93 Difference]: Finished difference Result 245 states and 560 transitions. [2020-10-15 16:21:41,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:21:41,524 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:41,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:41,525 INFO L225 Difference]: With dead ends: 245 [2020-10-15 16:21:41,525 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 16:21:41,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:21:41,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 16:21:41,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 163. [2020-10-15 16:21:41,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:21:41,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 399 transitions. [2020-10-15 16:21:41,528 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 399 transitions. Word has length 14 [2020-10-15 16:21:41,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:41,528 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 399 transitions. [2020-10-15 16:21:41,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:41,528 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 399 transitions. [2020-10-15 16:21:41,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:41,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:41,529 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:41,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-15 16:21:41,729 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:41,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:41,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2062713692, now seen corresponding path program 204 times [2020-10-15 16:21:41,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:41,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906419185] [2020-10-15 16:21:41,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:41,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906419185] [2020-10-15 16:21:41,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130791873] [2020-10-15 16:21:41,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:41,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:21:41,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:41,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:41,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:42,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:42,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:42,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183581200] [2020-10-15 16:21:42,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:42,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:42,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:42,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:42,325 INFO L87 Difference]: Start difference. First operand 163 states and 399 transitions. Second operand 17 states. [2020-10-15 16:21:42,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:42,902 INFO L93 Difference]: Finished difference Result 239 states and 549 transitions. [2020-10-15 16:21:42,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:21:42,903 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:42,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:42,904 INFO L225 Difference]: With dead ends: 239 [2020-10-15 16:21:42,904 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 16:21:42,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:21:42,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 16:21:42,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 162. [2020-10-15 16:21:42,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:21:42,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 396 transitions. [2020-10-15 16:21:42,908 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 396 transitions. Word has length 14 [2020-10-15 16:21:42,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:42,908 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 396 transitions. [2020-10-15 16:21:42,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:42,908 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 396 transitions. [2020-10-15 16:21:42,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:42,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:42,909 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:43,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-10-15 16:21:43,109 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:43,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:43,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2063667004, now seen corresponding path program 205 times [2020-10-15 16:21:43,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:43,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039426077] [2020-10-15 16:21:43,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:43,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039426077] [2020-10-15 16:21:43,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925653614] [2020-10-15 16:21:43,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:43,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:43,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:43,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:43,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:43,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424959169] [2020-10-15 16:21:43,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:43,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:43,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:43,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:43,651 INFO L87 Difference]: Start difference. First operand 162 states and 396 transitions. Second operand 17 states. [2020-10-15 16:21:44,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:44,056 INFO L93 Difference]: Finished difference Result 220 states and 508 transitions. [2020-10-15 16:21:44,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:21:44,057 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:44,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:44,058 INFO L225 Difference]: With dead ends: 220 [2020-10-15 16:21:44,058 INFO L226 Difference]: Without dead ends: 218 [2020-10-15 16:21:44,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:21:44,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-15 16:21:44,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 156. [2020-10-15 16:21:44,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 16:21:44,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2020-10-15 16:21:44,061 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 14 [2020-10-15 16:21:44,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:44,061 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2020-10-15 16:21:44,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:44,061 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2020-10-15 16:21:44,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:44,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:44,062 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:44,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-15 16:21:44,262 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:44,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:44,263 INFO L82 PathProgramCache]: Analyzing trace with hash 313362251, now seen corresponding path program 206 times [2020-10-15 16:21:44,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:44,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915506516] [2020-10-15 16:21:44,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:44,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915506516] [2020-10-15 16:21:44,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359439330] [2020-10-15 16:21:44,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:44,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:21:44,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:44,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:44,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:44,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:44,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:44,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808283191] [2020-10-15 16:21:44,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:44,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:44,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:44,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:44,796 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 17 states. [2020-10-15 16:21:45,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:45,359 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-15 16:21:45,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:21:45,361 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:45,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:45,361 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:21:45,361 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:21:45,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:21:45,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:21:45,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-15 16:21:45,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:21:45,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 395 transitions. [2020-10-15 16:21:45,364 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 395 transitions. Word has length 14 [2020-10-15 16:21:45,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:45,364 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 395 transitions. [2020-10-15 16:21:45,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:45,364 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 395 transitions. [2020-10-15 16:21:45,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:45,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:45,365 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:45,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2020-10-15 16:21:45,566 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:45,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:45,566 INFO L82 PathProgramCache]: Analyzing trace with hash 313363212, now seen corresponding path program 207 times [2020-10-15 16:21:45,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:45,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896313743] [2020-10-15 16:21:45,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:45,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:45,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896313743] [2020-10-15 16:21:45,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530163674] [2020-10-15 16:21:45,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:45,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:21:45,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:45,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:45,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:46,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:46,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:46,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427787063] [2020-10-15 16:21:46,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:46,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:46,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:46,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:46,091 INFO L87 Difference]: Start difference. First operand 160 states and 395 transitions. Second operand 17 states. [2020-10-15 16:21:46,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:46,742 INFO L93 Difference]: Finished difference Result 233 states and 536 transitions. [2020-10-15 16:21:46,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:21:46,745 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:46,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:46,745 INFO L225 Difference]: With dead ends: 233 [2020-10-15 16:21:46,745 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 16:21:46,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:21:46,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 16:21:46,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 159. [2020-10-15 16:21:46,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 16:21:46,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 392 transitions. [2020-10-15 16:21:46,748 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 392 transitions. Word has length 14 [2020-10-15 16:21:46,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:46,748 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 392 transitions. [2020-10-15 16:21:46,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:46,748 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 392 transitions. [2020-10-15 16:21:46,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:46,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:46,749 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:46,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:46,949 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:46,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:46,950 INFO L82 PathProgramCache]: Analyzing trace with hash 313392042, now seen corresponding path program 208 times [2020-10-15 16:21:46,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:46,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2835577] [2020-10-15 16:21:46,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:47,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2835577] [2020-10-15 16:21:47,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681749579] [2020-10-15 16:21:47,109 INFO L93 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:47,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:21:47,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:47,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:47,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:48,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:48,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:48,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349902582] [2020-10-15 16:21:48,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:48,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:48,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:48,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:48,917 INFO L87 Difference]: Start difference. First operand 159 states and 392 transitions. Second operand 17 states. [2020-10-15 16:21:49,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:49,891 INFO L93 Difference]: Finished difference Result 256 states and 582 transitions. [2020-10-15 16:21:49,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:21:49,892 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:49,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:49,892 INFO L225 Difference]: With dead ends: 256 [2020-10-15 16:21:49,892 INFO L226 Difference]: Without dead ends: 254 [2020-10-15 16:21:49,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:21:49,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-15 16:21:49,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 163. [2020-10-15 16:21:49,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:21:49,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 403 transitions. [2020-10-15 16:21:49,896 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 403 transitions. Word has length 14 [2020-10-15 16:21:49,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:49,896 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 403 transitions. [2020-10-15 16:21:49,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:49,896 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 403 transitions. [2020-10-15 16:21:49,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:49,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:49,897 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:50,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:50,097 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:50,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:50,098 INFO L82 PathProgramCache]: Analyzing trace with hash 314286733, now seen corresponding path program 209 times [2020-10-15 16:21:50,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:50,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013889775] [2020-10-15 16:21:50,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:50,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013889775] [2020-10-15 16:21:50,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275487751] [2020-10-15 16:21:50,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:50,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:21:50,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:50,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:50,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:50,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:50,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:50,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:50,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363830272] [2020-10-15 16:21:50,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:50,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:50,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:50,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:50,656 INFO L87 Difference]: Start difference. First operand 163 states and 403 transitions. Second operand 17 states. [2020-10-15 16:21:51,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:51,493 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-15 16:21:51,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:21:51,495 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:51,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:51,496 INFO L225 Difference]: With dead ends: 246 [2020-10-15 16:21:51,496 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 16:21:51,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:21:51,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 16:21:51,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 162. [2020-10-15 16:21:51,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:21:51,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-10-15 16:21:51,506 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 14 [2020-10-15 16:21:51,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:51,506 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-10-15 16:21:51,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:51,507 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-10-15 16:21:51,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:51,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:51,507 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:51,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:51,708 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:51,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:51,708 INFO L82 PathProgramCache]: Analyzing trace with hash 950591741, now seen corresponding path program 210 times [2020-10-15 16:21:51,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:51,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985718628] [2020-10-15 16:21:51,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:51,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985718628] [2020-10-15 16:21:51,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127983007] [2020-10-15 16:21:51,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:51,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:21:51,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:51,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:51,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:52,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:52,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:52,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742972791] [2020-10-15 16:21:52,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:52,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:52,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:52,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:52,248 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 17 states. [2020-10-15 16:21:53,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:53,082 INFO L93 Difference]: Finished difference Result 250 states and 575 transitions. [2020-10-15 16:21:53,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:21:53,084 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:53,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:53,085 INFO L225 Difference]: With dead ends: 250 [2020-10-15 16:21:53,085 INFO L226 Difference]: Without dead ends: 248 [2020-10-15 16:21:53,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:21:53,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-15 16:21:53,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 164. [2020-10-15 16:21:53,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:21:53,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-15 16:21:53,089 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-15 16:21:53,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:53,089 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-15 16:21:53,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:53,089 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-15 16:21:53,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:53,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:53,089 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:53,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-10-15 16:21:53,290 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:53,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:53,291 INFO L82 PathProgramCache]: Analyzing trace with hash 950592702, now seen corresponding path program 211 times [2020-10-15 16:21:53,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:53,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303952406] [2020-10-15 16:21:53,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:53,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303952406] [2020-10-15 16:21:53,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183428026] [2020-10-15 16:21:53,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:53,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:53,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:53,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:53,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:53,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732114831] [2020-10-15 16:21:53,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:53,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:53,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:53,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:53,823 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-15 16:21:54,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:54,594 INFO L93 Difference]: Finished difference Result 245 states and 564 transitions. [2020-10-15 16:21:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:21:54,599 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:54,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:54,600 INFO L225 Difference]: With dead ends: 245 [2020-10-15 16:21:54,600 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 16:21:54,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:21:54,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 16:21:54,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 164. [2020-10-15 16:21:54,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:21:54,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-15 16:21:54,603 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-15 16:21:54,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:54,603 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-15 16:21:54,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:54,603 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-15 16:21:54,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:54,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:54,604 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:54,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:54,804 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:54,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:54,805 INFO L82 PathProgramCache]: Analyzing trace with hash 950621532, now seen corresponding path program 212 times [2020-10-15 16:21:54,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:54,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079159308] [2020-10-15 16:21:54,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:54,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:54,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079159308] [2020-10-15 16:21:54,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068023882] [2020-10-15 16:21:54,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:55,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:21:55,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:55,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:55,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:55,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:55,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:55,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:55,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164274068] [2020-10-15 16:21:55,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:55,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:55,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:55,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:55,476 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-15 16:21:56,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:56,651 INFO L93 Difference]: Finished difference Result 262 states and 602 transitions. [2020-10-15 16:21:56,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:21:56,653 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:56,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:56,654 INFO L225 Difference]: With dead ends: 262 [2020-10-15 16:21:56,654 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 16:21:56,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:21:56,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 16:21:56,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 165. [2020-10-15 16:21:56,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:21:56,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-15 16:21:56,657 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-15 16:21:56,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:56,657 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-15 16:21:56,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:56,658 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-15 16:21:56,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:56,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:56,664 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:56,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-10-15 16:21:56,865 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:56,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:56,866 INFO L82 PathProgramCache]: Analyzing trace with hash 971147531, now seen corresponding path program 213 times [2020-10-15 16:21:56,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:56,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287964020] [2020-10-15 16:21:56,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:57,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287964020] [2020-10-15 16:21:57,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28085113] [2020-10-15 16:21:57,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:57,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:21:57,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:57,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:57,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:57,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:57,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:57,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022704188] [2020-10-15 16:21:57,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:57,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:57,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:57,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:57,435 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-15 16:21:58,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:58,364 INFO L93 Difference]: Finished difference Result 254 states and 594 transitions. [2020-10-15 16:21:58,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:21:58,367 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:58,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:58,368 INFO L225 Difference]: With dead ends: 254 [2020-10-15 16:21:58,368 INFO L226 Difference]: Without dead ends: 252 [2020-10-15 16:21:58,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:21:58,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-15 16:21:58,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 166. [2020-10-15 16:21:58,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:21:58,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 416 transitions. [2020-10-15 16:21:58,371 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 416 transitions. Word has length 14 [2020-10-15 16:21:58,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:58,371 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 416 transitions. [2020-10-15 16:21:58,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:58,371 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 416 transitions. [2020-10-15 16:21:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:58,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:58,371 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:58,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-10-15 16:21:58,572 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:58,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:58,573 INFO L82 PathProgramCache]: Analyzing trace with hash 971148492, now seen corresponding path program 214 times [2020-10-15 16:21:58,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:58,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533101370] [2020-10-15 16:21:58,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:58,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533101370] [2020-10-15 16:21:58,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40492270] [2020-10-15 16:21:58,788 INFO L93 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:58,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:21:58,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:58,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:58,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:59,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:59,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:59,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:59,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976989711] [2020-10-15 16:21:59,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:59,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:59,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:59,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:59,183 INFO L87 Difference]: Start difference. First operand 166 states and 416 transitions. Second operand 17 states. [2020-10-15 16:22:00,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:00,089 INFO L93 Difference]: Finished difference Result 248 states and 576 transitions. [2020-10-15 16:22:00,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:22:00,091 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:00,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:00,092 INFO L225 Difference]: With dead ends: 248 [2020-10-15 16:22:00,092 INFO L226 Difference]: Without dead ends: 246 [2020-10-15 16:22:00,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:22:00,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-15 16:22:00,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 167. [2020-10-15 16:22:00,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:22:00,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 16:22:00,095 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 16:22:00,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:00,096 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 16:22:00,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:00,096 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 16:22:00,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:00,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:00,096 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:00,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:00,297 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:00,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:00,297 INFO L82 PathProgramCache]: Analyzing trace with hash 971810621, now seen corresponding path program 215 times [2020-10-15 16:22:00,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:00,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625270578] [2020-10-15 16:22:00,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:00,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625270578] [2020-10-15 16:22:00,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623620731] [2020-10-15 16:22:00,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:00,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:22:00,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:00,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:00,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:00,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:00,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:00,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330233350] [2020-10-15 16:22:00,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:00,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:00,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:00,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:00,787 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 16:22:01,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:01,892 INFO L93 Difference]: Finished difference Result 245 states and 579 transitions. [2020-10-15 16:22:01,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:22:01,894 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:01,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:01,895 INFO L225 Difference]: With dead ends: 245 [2020-10-15 16:22:01,895 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 16:22:01,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=324, Invalid=798, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:22:01,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 16:22:01,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 169. [2020-10-15 16:22:01,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:22:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 16:22:01,901 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 16:22:01,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:01,902 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 16:22:01,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:01,903 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 16:22:01,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:01,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:01,903 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:02,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:02,109 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:02,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:02,109 INFO L82 PathProgramCache]: Analyzing trace with hash 971831980, now seen corresponding path program 216 times [2020-10-15 16:22:02,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:02,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659868415] [2020-10-15 16:22:02,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:02,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659868415] [2020-10-15 16:22:02,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358789519] [2020-10-15 16:22:02,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:02,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:22:02,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:02,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:02,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:02,538 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:22:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:02,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:02,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:02,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441223380] [2020-10-15 16:22:02,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:02,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:02,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:02,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:02,559 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 16:22:03,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:03,261 INFO L93 Difference]: Finished difference Result 223 states and 540 transitions. [2020-10-15 16:22:03,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:22:03,263 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:03,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:03,263 INFO L225 Difference]: With dead ends: 223 [2020-10-15 16:22:03,263 INFO L226 Difference]: Without dead ends: 218 [2020-10-15 16:22:03,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:22:03,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-15 16:22:03,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2020-10-15 16:22:03,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:22:03,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 16:22:03,267 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 16:22:03,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:03,267 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 16:22:03,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:03,267 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 16:22:03,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:03,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:03,268 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:03,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-10-15 16:22:03,468 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:03,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:03,469 INFO L82 PathProgramCache]: Analyzing trace with hash 971832941, now seen corresponding path program 217 times [2020-10-15 16:22:03,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:03,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367193025] [2020-10-15 16:22:03,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:03,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367193025] [2020-10-15 16:22:03,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812448988] [2020-10-15 16:22:03,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:03,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:03,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:03,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:22:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:04,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:04,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:04,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927456306] [2020-10-15 16:22:04,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:04,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:04,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:04,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:04,080 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 16:22:05,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:05,725 INFO L93 Difference]: Finished difference Result 286 states and 679 transitions. [2020-10-15 16:22:05,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:22:05,727 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:05,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:05,728 INFO L225 Difference]: With dead ends: 286 [2020-10-15 16:22:05,728 INFO L226 Difference]: Without dead ends: 281 [2020-10-15 16:22:05,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:22:05,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-15 16:22:05,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 167. [2020-10-15 16:22:05,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:22:05,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 16:22:05,732 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 16:22:05,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:05,732 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 16:22:05,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:05,732 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 16:22:05,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:05,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:05,733 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:05,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:05,934 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:05,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:05,934 INFO L82 PathProgramCache]: Analyzing trace with hash 971840412, now seen corresponding path program 218 times [2020-10-15 16:22:05,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:05,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635219371] [2020-10-15 16:22:05,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:06,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635219371] [2020-10-15 16:22:06,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061722641] [2020-10-15 16:22:06,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:06,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:22:06,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:06,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:06,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:06,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:06,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:06,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903940142] [2020-10-15 16:22:06,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:06,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:06,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:06,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:06,452 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 16:22:07,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:07,559 INFO L93 Difference]: Finished difference Result 268 states and 630 transitions. [2020-10-15 16:22:07,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:22:07,562 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:07,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:07,563 INFO L225 Difference]: With dead ends: 268 [2020-10-15 16:22:07,563 INFO L226 Difference]: Without dead ends: 266 [2020-10-15 16:22:07,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:22:07,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-15 16:22:07,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 169. [2020-10-15 16:22:07,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:22:07,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 16:22:07,567 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 16:22:07,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:07,567 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 16:22:07,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:07,567 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 16:22:07,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:07,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:07,567 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:07,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2020-10-15 16:22:07,768 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:07,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:07,769 INFO L82 PathProgramCache]: Analyzing trace with hash 971861771, now seen corresponding path program 219 times [2020-10-15 16:22:07,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:07,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738581735] [2020-10-15 16:22:07,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:07,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738581735] [2020-10-15 16:22:07,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614766297] [2020-10-15 16:22:07,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:08,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:22:08,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:08,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:08,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:08,302 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:22:08,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:08,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:08,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:08,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663559933] [2020-10-15 16:22:08,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:08,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:08,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:08,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:08,388 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 16:22:10,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:10,376 INFO L93 Difference]: Finished difference Result 296 states and 707 transitions. [2020-10-15 16:22:10,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:22:10,379 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:10,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:10,380 INFO L225 Difference]: With dead ends: 296 [2020-10-15 16:22:10,380 INFO L226 Difference]: Without dead ends: 291 [2020-10-15 16:22:10,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=419, Invalid=987, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:22:10,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-15 16:22:10,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 169. [2020-10-15 16:22:10,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:22:10,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 16:22:10,383 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 16:22:10,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:10,383 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 16:22:10,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:10,383 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 16:22:10,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:10,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:10,384 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:10,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:10,585 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:10,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:10,585 INFO L82 PathProgramCache]: Analyzing trace with hash 971862732, now seen corresponding path program 220 times [2020-10-15 16:22:10,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:10,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094569628] [2020-10-15 16:22:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:10,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094569628] [2020-10-15 16:22:10,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429717317] [2020-10-15 16:22:10,764 INFO L93 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:10,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:22:10,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:10,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:10,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:11,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:22:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:11,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:11,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:11,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330963531] [2020-10-15 16:22:11,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:11,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:11,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:11,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:11,123 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 16:22:12,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:12,802 INFO L93 Difference]: Finished difference Result 299 states and 710 transitions. [2020-10-15 16:22:12,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:22:12,805 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:12,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:12,805 INFO L225 Difference]: With dead ends: 299 [2020-10-15 16:22:12,805 INFO L226 Difference]: Without dead ends: 294 [2020-10-15 16:22:12,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=476, Invalid=1084, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:22:12,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-15 16:22:12,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 165. [2020-10-15 16:22:12,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:22:12,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-15 16:22:12,810 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-15 16:22:12,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:12,810 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-15 16:22:12,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:12,810 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-15 16:22:12,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:12,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:12,811 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:13,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:13,012 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:13,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:13,013 INFO L82 PathProgramCache]: Analyzing trace with hash 972071052, now seen corresponding path program 221 times [2020-10-15 16:22:13,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:13,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956869617] [2020-10-15 16:22:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:13,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:13,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956869617] [2020-10-15 16:22:13,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292576718] [2020-10-15 16:22:13,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:13,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:22:13,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:13,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:13,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:13,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:13,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:13,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644936766] [2020-10-15 16:22:13,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:13,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:13,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:13,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:13,684 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-15 16:22:15,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:15,138 INFO L93 Difference]: Finished difference Result 274 states and 633 transitions. [2020-10-15 16:22:15,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:22:15,139 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:15,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:15,140 INFO L225 Difference]: With dead ends: 274 [2020-10-15 16:22:15,140 INFO L226 Difference]: Without dead ends: 272 [2020-10-15 16:22:15,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:22:15,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-15 16:22:15,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2020-10-15 16:22:15,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:22:15,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 16:22:15,145 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 16:22:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:15,145 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 16:22:15,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:15,146 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 16:22:15,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:15,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:15,146 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:15,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:15,358 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:15,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:15,358 INFO L82 PathProgramCache]: Analyzing trace with hash 972734142, now seen corresponding path program 222 times [2020-10-15 16:22:15,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:15,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763392891] [2020-10-15 16:22:15,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:15,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763392891] [2020-10-15 16:22:15,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418536479] [2020-10-15 16:22:15,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:15,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:22:15,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:15,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:15,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:16,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:16,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:16,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020363092] [2020-10-15 16:22:16,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:16,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:16,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:16,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:16,446 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 16:22:18,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:18,116 INFO L93 Difference]: Finished difference Result 282 states and 670 transitions. [2020-10-15 16:22:18,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:22:18,119 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:18,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:18,121 INFO L225 Difference]: With dead ends: 282 [2020-10-15 16:22:18,125 INFO L226 Difference]: Without dead ends: 280 [2020-10-15 16:22:18,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:22:18,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-15 16:22:18,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 174. [2020-10-15 16:22:18,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-15 16:22:18,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 442 transitions. [2020-10-15 16:22:18,129 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 442 transitions. Word has length 14 [2020-10-15 16:22:18,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:18,130 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 442 transitions. [2020-10-15 16:22:18,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:18,130 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 442 transitions. [2020-10-15 16:22:18,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:18,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:18,130 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:18,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-10-15 16:22:18,335 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:18,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:18,336 INFO L82 PathProgramCache]: Analyzing trace with hash 972755501, now seen corresponding path program 223 times [2020-10-15 16:22:18,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:18,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144705176] [2020-10-15 16:22:18,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:18,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144705176] [2020-10-15 16:22:18,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818292079] [2020-10-15 16:22:18,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:18,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:18,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:18,824 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:22:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:18,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:18,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:18,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648318853] [2020-10-15 16:22:18,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:18,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:18,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:18,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:18,899 INFO L87 Difference]: Start difference. First operand 174 states and 442 transitions. Second operand 17 states. [2020-10-15 16:22:20,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:20,826 INFO L93 Difference]: Finished difference Result 321 states and 773 transitions. [2020-10-15 16:22:20,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:22:20,828 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:20,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:20,829 INFO L225 Difference]: With dead ends: 321 [2020-10-15 16:22:20,829 INFO L226 Difference]: Without dead ends: 313 [2020-10-15 16:22:20,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=528, Invalid=1278, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:22:20,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-15 16:22:20,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 176. [2020-10-15 16:22:20,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-15 16:22:20,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 452 transitions. [2020-10-15 16:22:20,832 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 452 transitions. Word has length 14 [2020-10-15 16:22:20,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:20,832 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 452 transitions. [2020-10-15 16:22:20,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:20,833 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 452 transitions. [2020-10-15 16:22:20,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:20,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:20,837 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:21,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-10-15 16:22:21,038 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:21,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:21,039 INFO L82 PathProgramCache]: Analyzing trace with hash 972756462, now seen corresponding path program 224 times [2020-10-15 16:22:21,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:21,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763319411] [2020-10-15 16:22:21,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:21,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763319411] [2020-10-15 16:22:21,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403510415] [2020-10-15 16:22:21,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:21,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:22:21,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:21,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:21,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:25,732 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:22:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:25,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:25,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:25,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947485790] [2020-10-15 16:22:25,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:25,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:25,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:25,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=190, Unknown=2, NotChecked=0, Total=272 [2020-10-15 16:22:25,793 INFO L87 Difference]: Start difference. First operand 176 states and 452 transitions. Second operand 17 states. [2020-10-15 16:22:30,559 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-15 16:22:34,734 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-15 16:22:39,042 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-15 16:22:43,368 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-15 16:22:45,485 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-15 16:22:50,267 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-15 16:22:51,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:51,322 INFO L93 Difference]: Finished difference Result 323 states and 782 transitions. [2020-10-15 16:22:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:22:51,326 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:51,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:51,326 INFO L225 Difference]: With dead ends: 323 [2020-10-15 16:22:51,327 INFO L226 Difference]: Without dead ends: 315 [2020-10-15 16:22:51,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=530, Invalid=1274, Unknown=2, NotChecked=0, Total=1806 [2020-10-15 16:22:51,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-15 16:22:51,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 171. [2020-10-15 16:22:51,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 16:22:51,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-10-15 16:22:51,330 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-10-15 16:22:51,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:51,330 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-10-15 16:22:51,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:51,330 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-10-15 16:22:51,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:51,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:51,331 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:51,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-10-15 16:22:51,531 INFO L429 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:51,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:51,532 INFO L82 PathProgramCache]: Analyzing trace with hash 972785292, now seen corresponding path program 225 times [2020-10-15 16:22:51,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:51,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688751462] [2020-10-15 16:22:51,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:51,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688751462] [2020-10-15 16:22:51,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701940606] [2020-10-15 16:22:51,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:51,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:22:51,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:51,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:51,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:52,071 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:22:52,073 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:22:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:52,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:52,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:52,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903472153] [2020-10-15 16:22:52,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:52,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:52,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:52,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:52,132 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-10-15 16:22:55,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:55,007 INFO L93 Difference]: Finished difference Result 320 states and 767 transitions. [2020-10-15 16:22:55,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:22:55,009 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:55,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:55,010 INFO L225 Difference]: With dead ends: 320 [2020-10-15 16:22:55,010 INFO L226 Difference]: Without dead ends: 312 [2020-10-15 16:22:55,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:22:55,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-15 16:22:55,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 170. [2020-10-15 16:22:55,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-15 16:22:55,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 431 transitions. [2020-10-15 16:22:55,013 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 431 transitions. Word has length 14 [2020-10-15 16:22:55,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:55,013 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 431 transitions. [2020-10-15 16:22:55,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:55,014 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 431 transitions. [2020-10-15 16:22:55,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:55,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:55,014 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:55,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-10-15 16:22:55,215 INFO L429 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:55,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:55,215 INFO L82 PathProgramCache]: Analyzing trace with hash 979221853, now seen corresponding path program 226 times [2020-10-15 16:22:55,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:55,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95565216] [2020-10-15 16:22:55,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:55,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:55,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95565216] [2020-10-15 16:22:55,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234182203] [2020-10-15 16:22:55,412 INFO L93 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:55,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:22:55,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:55,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:55,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:55,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:55,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:55,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582857733] [2020-10-15 16:22:55,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:55,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:55,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:55,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:55,846 INFO L87 Difference]: Start difference. First operand 170 states and 431 transitions. Second operand 17 states. [2020-10-15 16:22:56,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:56,806 INFO L93 Difference]: Finished difference Result 256 states and 599 transitions. [2020-10-15 16:22:56,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:22:56,809 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:56,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:56,810 INFO L225 Difference]: With dead ends: 256 [2020-10-15 16:22:56,810 INFO L226 Difference]: Without dead ends: 254 [2020-10-15 16:22:56,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:22:56,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-15 16:22:56,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 168. [2020-10-15 16:22:56,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-15 16:22:56,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 425 transitions. [2020-10-15 16:22:56,814 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 425 transitions. Word has length 14 [2020-10-15 16:22:56,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:56,814 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 425 transitions. [2020-10-15 16:22:56,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:56,814 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 425 transitions. [2020-10-15 16:22:56,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:56,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:56,814 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:57,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2020-10-15 16:22:57,015 INFO L429 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:57,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:57,016 INFO L82 PathProgramCache]: Analyzing trace with hash 999776682, now seen corresponding path program 227 times [2020-10-15 16:22:57,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:57,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575438342] [2020-10-15 16:22:57,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:57,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:57,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575438342] [2020-10-15 16:22:57,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127633187] [2020-10-15 16:22:57,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:57,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:22:57,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:57,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:57,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:57,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:57,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:57,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956352239] [2020-10-15 16:22:57,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:57,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:57,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:57,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:57,572 INFO L87 Difference]: Start difference. First operand 168 states and 425 transitions. Second operand 17 states. [2020-10-15 16:22:59,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:59,107 INFO L93 Difference]: Finished difference Result 294 states and 688 transitions. [2020-10-15 16:22:59,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:22:59,109 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:59,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:59,109 INFO L225 Difference]: With dead ends: 294 [2020-10-15 16:22:59,109 INFO L226 Difference]: Without dead ends: 292 [2020-10-15 16:22:59,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=389, Invalid=943, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:22:59,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-15 16:22:59,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 166. [2020-10-15 16:22:59,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:22:59,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 423 transitions. [2020-10-15 16:22:59,113 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 423 transitions. Word has length 14 [2020-10-15 16:22:59,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:59,113 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 423 transitions. [2020-10-15 16:22:59,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:59,113 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 423 transitions. [2020-10-15 16:22:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:59,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:59,114 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:59,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:59,314 INFO L429 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:59,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:59,315 INFO L82 PathProgramCache]: Analyzing trace with hash 999777643, now seen corresponding path program 228 times [2020-10-15 16:22:59,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:59,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845353114] [2020-10-15 16:22:59,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:59,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845353114] [2020-10-15 16:22:59,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652777166] [2020-10-15 16:22:59,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:59,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:22:59,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:59,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:59,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:59,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:59,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:59,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83393832] [2020-10-15 16:22:59,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:59,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:59,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:59,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:59,903 INFO L87 Difference]: Start difference. First operand 166 states and 423 transitions. Second operand 17 states. [2020-10-15 16:23:01,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:01,438 INFO L93 Difference]: Finished difference Result 266 states and 625 transitions. [2020-10-15 16:23:01,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:23:01,441 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:01,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:01,441 INFO L225 Difference]: With dead ends: 266 [2020-10-15 16:23:01,442 INFO L226 Difference]: Without dead ends: 264 [2020-10-15 16:23:01,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=316, Invalid=806, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:23:01,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-15 16:23:01,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 164. [2020-10-15 16:23:01,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:23:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-10-15 16:23:01,445 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-10-15 16:23:01,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:01,445 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-10-15 16:23:01,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:01,445 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-10-15 16:23:01,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:01,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:01,446 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:01,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:01,646 INFO L429 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:01,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:01,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1000439772, now seen corresponding path program 229 times [2020-10-15 16:23:01,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:01,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117198861] [2020-10-15 16:23:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:01,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117198861] [2020-10-15 16:23:01,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632448115] [2020-10-15 16:23:01,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:01,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:01,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:02,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:02,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:02,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233468085] [2020-10-15 16:23:02,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:02,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:02,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:02,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:02,340 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-10-15 16:23:04,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:04,202 INFO L93 Difference]: Finished difference Result 275 states and 656 transitions. [2020-10-15 16:23:04,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:23:04,205 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:04,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:04,205 INFO L225 Difference]: With dead ends: 275 [2020-10-15 16:23:04,206 INFO L226 Difference]: Without dead ends: 273 [2020-10-15 16:23:04,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:23:04,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-15 16:23:04,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 166. [2020-10-15 16:23:04,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:23:04,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-10-15 16:23:04,209 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-10-15 16:23:04,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:04,209 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-10-15 16:23:04,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:04,209 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-10-15 16:23:04,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:04,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:04,210 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:04,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:04,410 INFO L429 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:04,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:04,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1000461131, now seen corresponding path program 230 times [2020-10-15 16:23:04,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:04,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848644996] [2020-10-15 16:23:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:04,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848644996] [2020-10-15 16:23:04,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300727379] [2020-10-15 16:23:04,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:04,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:23:04,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:04,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:04,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:04,909 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:23:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:04,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:04,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:04,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087703220] [2020-10-15 16:23:04,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:04,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:04,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:04,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:04,933 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-10-15 16:23:06,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:06,440 INFO L93 Difference]: Finished difference Result 285 states and 690 transitions. [2020-10-15 16:23:06,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:23:06,443 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:06,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:06,444 INFO L225 Difference]: With dead ends: 285 [2020-10-15 16:23:06,444 INFO L226 Difference]: Without dead ends: 277 [2020-10-15 16:23:06,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=482, Invalid=1240, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:23:06,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-15 16:23:06,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 166. [2020-10-15 16:23:06,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:23:06,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-10-15 16:23:06,448 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-10-15 16:23:06,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:06,448 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-10-15 16:23:06,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:06,448 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-10-15 16:23:06,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:06,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:06,449 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:06,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2020-10-15 16:23:06,652 INFO L429 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:06,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:06,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1000462092, now seen corresponding path program 231 times [2020-10-15 16:23:06,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:06,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339190376] [2020-10-15 16:23:06,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:06,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339190376] [2020-10-15 16:23:06,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402655309] [2020-10-15 16:23:06,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:06,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:23:06,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:06,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:06,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:07,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:23:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:07,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:07,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:07,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201532017] [2020-10-15 16:23:07,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:07,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:07,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:07,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:07,289 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-10-15 16:23:09,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:09,428 INFO L93 Difference]: Finished difference Result 307 states and 744 transitions. [2020-10-15 16:23:09,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:23:09,432 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:09,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:09,433 INFO L225 Difference]: With dead ends: 307 [2020-10-15 16:23:09,433 INFO L226 Difference]: Without dead ends: 299 [2020-10-15 16:23:09,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:23:09,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-15 16:23:09,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 164. [2020-10-15 16:23:09,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:23:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-10-15 16:23:09,436 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-10-15 16:23:09,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:09,436 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-10-15 16:23:09,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:09,436 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-10-15 16:23:09,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:09,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:09,437 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:09,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:09,640 INFO L429 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:09,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:09,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1000469563, now seen corresponding path program 232 times [2020-10-15 16:23:09,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:09,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119286949] [2020-10-15 16:23:09,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:09,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119286949] [2020-10-15 16:23:09,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060287583] [2020-10-15 16:23:09,896 INFO L93 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:09,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:23:09,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:09,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:09,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:10,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:10,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:10,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072726174] [2020-10-15 16:23:10,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:10,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:10,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:10,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:10,278 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-10-15 16:23:12,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:12,070 INFO L93 Difference]: Finished difference Result 280 states and 668 transitions. [2020-10-15 16:23:12,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:23:12,074 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:12,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:12,075 INFO L225 Difference]: With dead ends: 280 [2020-10-15 16:23:12,075 INFO L226 Difference]: Without dead ends: 278 [2020-10-15 16:23:12,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=412, Invalid=994, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:23:12,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-15 16:23:12,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 166. [2020-10-15 16:23:12,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:23:12,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-10-15 16:23:12,078 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-10-15 16:23:12,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:12,078 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-10-15 16:23:12,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:12,078 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-10-15 16:23:12,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:12,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:12,079 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:12,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2020-10-15 16:23:12,279 INFO L429 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:12,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:12,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1000490922, now seen corresponding path program 233 times [2020-10-15 16:23:12,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:12,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270534586] [2020-10-15 16:23:12,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:12,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270534586] [2020-10-15 16:23:12,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861709686] [2020-10-15 16:23:12,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:12,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:23:12,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:12,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:12,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:12,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:23:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:12,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:12,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:12,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443955785] [2020-10-15 16:23:12,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:12,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:12,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:12,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:12,942 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-10-15 16:23:14,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:14,987 INFO L93 Difference]: Finished difference Result 315 states and 764 transitions. [2020-10-15 16:23:14,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:23:14,991 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:14,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:14,992 INFO L225 Difference]: With dead ends: 315 [2020-10-15 16:23:14,992 INFO L226 Difference]: Without dead ends: 307 [2020-10-15 16:23:14,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:23:14,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-15 16:23:14,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 164. [2020-10-15 16:23:14,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:23:14,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 414 transitions. [2020-10-15 16:23:14,996 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 414 transitions. Word has length 14 [2020-10-15 16:23:14,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:14,997 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 414 transitions. [2020-10-15 16:23:14,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:14,997 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 414 transitions. [2020-10-15 16:23:14,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:14,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:14,997 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:15,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:15,198 INFO L429 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:15,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:15,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1000491883, now seen corresponding path program 234 times [2020-10-15 16:23:15,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:15,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473402112] [2020-10-15 16:23:15,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:15,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473402112] [2020-10-15 16:23:15,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434426474] [2020-10-15 16:23:15,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:15,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:23:15,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:15,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:15,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:15,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:23:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:15,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:15,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:15,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318426054] [2020-10-15 16:23:15,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:15,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:15,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:15,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:15,891 INFO L87 Difference]: Start difference. First operand 164 states and 414 transitions. Second operand 17 states. [2020-10-15 16:23:18,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:18,269 INFO L93 Difference]: Finished difference Result 312 states and 754 transitions. [2020-10-15 16:23:18,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:23:18,273 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:18,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:18,273 INFO L225 Difference]: With dead ends: 312 [2020-10-15 16:23:18,274 INFO L226 Difference]: Without dead ends: 304 [2020-10-15 16:23:18,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:23:18,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-15 16:23:18,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 157. [2020-10-15 16:23:18,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-15 16:23:18,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 391 transitions. [2020-10-15 16:23:18,277 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 391 transitions. Word has length 14 [2020-10-15 16:23:18,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:18,277 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 391 transitions. [2020-10-15 16:23:18,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:18,277 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 391 transitions. [2020-10-15 16:23:18,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:18,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:18,278 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:18,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-10-15 16:23:18,478 INFO L429 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:18,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:18,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1001384652, now seen corresponding path program 235 times [2020-10-15 16:23:18,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:18,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476514480] [2020-10-15 16:23:18,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:18,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:18,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476514480] [2020-10-15 16:23:18,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014617267] [2020-10-15 16:23:18,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:18,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:18,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:19,149 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:23:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:19,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:19,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:19,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757646166] [2020-10-15 16:23:19,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:19,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:19,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:19,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:19,189 INFO L87 Difference]: Start difference. First operand 157 states and 391 transitions. Second operand 17 states. [2020-10-15 16:23:21,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:21,921 INFO L93 Difference]: Finished difference Result 307 states and 730 transitions. [2020-10-15 16:23:21,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:23:21,925 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:21,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:21,926 INFO L225 Difference]: With dead ends: 307 [2020-10-15 16:23:21,926 INFO L226 Difference]: Without dead ends: 299 [2020-10-15 16:23:21,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:23:21,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-15 16:23:21,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 155. [2020-10-15 16:23:21,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-15 16:23:21,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 381 transitions. [2020-10-15 16:23:21,929 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 381 transitions. Word has length 14 [2020-10-15 16:23:21,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:21,930 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 381 transitions. [2020-10-15 16:23:21,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:21,930 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 381 transitions. [2020-10-15 16:23:21,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:21,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:21,930 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:22,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:22,131 INFO L429 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:22,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:22,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1866754364, now seen corresponding path program 236 times [2020-10-15 16:23:22,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:22,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939458566] [2020-10-15 16:23:22,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:22,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939458566] [2020-10-15 16:23:22,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609504293] [2020-10-15 16:23:22,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:22,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:23:22,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:22,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:22,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:22,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:22,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:22,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36562121] [2020-10-15 16:23:22,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:22,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:22,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:22,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:22,887 INFO L87 Difference]: Start difference. First operand 155 states and 381 transitions. Second operand 17 states. [2020-10-15 16:23:23,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:23,612 INFO L93 Difference]: Finished difference Result 225 states and 519 transitions. [2020-10-15 16:23:23,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:23:23,615 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:23,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:23,616 INFO L225 Difference]: With dead ends: 225 [2020-10-15 16:23:23,616 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 16:23:23,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:23:23,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 16:23:23,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 153. [2020-10-15 16:23:23,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-15 16:23:23,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 376 transitions. [2020-10-15 16:23:23,619 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 376 transitions. Word has length 14 [2020-10-15 16:23:23,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:23,620 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 376 transitions. [2020-10-15 16:23:23,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:23,620 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 376 transitions. [2020-10-15 16:23:23,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:23,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:23,620 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:23,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-10-15 16:23:23,821 INFO L429 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:23,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:23,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1888203884, now seen corresponding path program 237 times [2020-10-15 16:23:23,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:23,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240583398] [2020-10-15 16:23:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:24,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240583398] [2020-10-15 16:23:24,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368885440] [2020-10-15 16:23:24,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:24,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:23:24,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:24,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:24,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:24,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:24,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:24,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171531793] [2020-10-15 16:23:24,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:24,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:24,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:24,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:24,602 INFO L87 Difference]: Start difference. First operand 153 states and 376 transitions. Second operand 17 states. [2020-10-15 16:23:25,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:25,538 INFO L93 Difference]: Finished difference Result 223 states and 512 transitions. [2020-10-15 16:23:25,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:23:25,542 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:25,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:25,542 INFO L225 Difference]: With dead ends: 223 [2020-10-15 16:23:25,542 INFO L226 Difference]: Without dead ends: 221 [2020-10-15 16:23:25,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:23:25,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-15 16:23:25,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 151. [2020-10-15 16:23:25,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-15 16:23:25,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 371 transitions. [2020-10-15 16:23:25,546 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 371 transitions. Word has length 14 [2020-10-15 16:23:25,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:25,547 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 371 transitions. [2020-10-15 16:23:25,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:25,547 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 371 transitions. [2020-10-15 16:23:25,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:25,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:25,547 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:25,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2020-10-15 16:23:25,748 INFO L429 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:25,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:25,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1888866974, now seen corresponding path program 238 times [2020-10-15 16:23:25,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:25,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003516333] [2020-10-15 16:23:25,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:25,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:26,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003516333] [2020-10-15 16:23:26,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330376385] [2020-10-15 16:23:26,010 INFO L93 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:26,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:23:26,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:26,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:26,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:26,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:26,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:26,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879206088] [2020-10-15 16:23:26,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:26,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:26,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:26,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:26,576 INFO L87 Difference]: Start difference. First operand 151 states and 371 transitions. Second operand 17 states. [2020-10-15 16:23:27,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:27,724 INFO L93 Difference]: Finished difference Result 221 states and 510 transitions. [2020-10-15 16:23:27,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:23:27,734 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:27,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:27,735 INFO L225 Difference]: With dead ends: 221 [2020-10-15 16:23:27,735 INFO L226 Difference]: Without dead ends: 219 [2020-10-15 16:23:27,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=229, Invalid=527, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:23:27,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-15 16:23:27,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 152. [2020-10-15 16:23:27,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-15 16:23:27,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 373 transitions. [2020-10-15 16:23:27,738 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 373 transitions. Word has length 14 [2020-10-15 16:23:27,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:27,738 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 373 transitions. [2020-10-15 16:23:27,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:27,738 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 373 transitions. [2020-10-15 16:23:27,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:27,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:27,738 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:27,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:27,939 INFO L429 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:27,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:27,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1888889294, now seen corresponding path program 239 times [2020-10-15 16:23:27,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:27,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346916760] [2020-10-15 16:23:27,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:28,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346916760] [2020-10-15 16:23:28,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224367895] [2020-10-15 16:23:28,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:28,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:23:28,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:28,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:28,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:28,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:23:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:30,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:30,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 16:23:30,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424454351] [2020-10-15 16:23:30,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:23:30,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:30,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:23:30,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2020-10-15 16:23:30,849 INFO L87 Difference]: Start difference. First operand 152 states and 373 transitions. Second operand 18 states. [2020-10-15 16:23:52,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:52,746 INFO L93 Difference]: Finished difference Result 263 states and 608 transitions. [2020-10-15 16:23:52,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:23:52,755 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 16:23:52,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:52,755 INFO L225 Difference]: With dead ends: 263 [2020-10-15 16:23:52,755 INFO L226 Difference]: Without dead ends: 258 [2020-10-15 16:23:52,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=334, Invalid=720, Unknown=2, NotChecked=0, Total=1056 [2020-10-15 16:23:52,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-15 16:23:52,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 150. [2020-10-15 16:23:52,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-15 16:23:52,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 366 transitions. [2020-10-15 16:23:52,757 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 366 transitions. Word has length 14 [2020-10-15 16:23:52,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:52,758 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 366 transitions. [2020-10-15 16:23:52,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:23:52,758 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 366 transitions. [2020-10-15 16:23:52,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:52,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:52,758 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:52,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:52,959 INFO L429 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:52,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:52,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1888918124, now seen corresponding path program 240 times [2020-10-15 16:23:52,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:52,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386845950] [2020-10-15 16:23:52,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:53,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386845950] [2020-10-15 16:23:53,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720001483] [2020-10-15 16:23:53,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:53,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:23:53,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:53,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:53,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:53,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:23:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:53,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:53,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:53,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534161954] [2020-10-15 16:23:53,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:53,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:53,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:53,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:53,641 INFO L87 Difference]: Start difference. First operand 150 states and 366 transitions. Second operand 17 states. [2020-10-15 16:23:54,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:54,607 INFO L93 Difference]: Finished difference Result 225 states and 522 transitions. [2020-10-15 16:23:54,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:23:54,611 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:54,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:54,612 INFO L225 Difference]: With dead ends: 225 [2020-10-15 16:23:54,612 INFO L226 Difference]: Without dead ends: 220 [2020-10-15 16:23:54,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:23:54,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-15 16:23:54,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 146. [2020-10-15 16:23:54,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 16:23:54,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 342 transitions. [2020-10-15 16:23:54,615 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 342 transitions. Word has length 14 [2020-10-15 16:23:54,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:54,615 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 342 transitions. [2020-10-15 16:23:54,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:54,616 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 342 transitions. [2020-10-15 16:23:54,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:54,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:54,616 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:54,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:54,817 INFO L429 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:54,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:54,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1949255125, now seen corresponding path program 7 times [2020-10-15 16:23:54,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:54,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33887248] [2020-10-15 16:23:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:55,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33887248] [2020-10-15 16:23:55,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461907060] [2020-10-15 16:23:55,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:55,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:23:55,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:55,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-15 16:23:55,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 18 [2020-10-15 16:23:55,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412189982] [2020-10-15 16:23:55,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:23:55,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:55,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:23:55,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:23:55,436 INFO L87 Difference]: Start difference. First operand 146 states and 342 transitions. Second operand 9 states. [2020-10-15 16:23:55,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:55,513 INFO L93 Difference]: Finished difference Result 235 states and 626 transitions. [2020-10-15 16:23:55,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:23:55,517 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-15 16:23:55,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:55,517 INFO L225 Difference]: With dead ends: 235 [2020-10-15 16:23:55,517 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:23:55,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:23:55,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:23:55,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2020-10-15 16:23:55,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-15 16:23:55,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 611 transitions. [2020-10-15 16:23:55,522 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 611 transitions. Word has length 14 [2020-10-15 16:23:55,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:55,522 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 611 transitions. [2020-10-15 16:23:55,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:23:55,522 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 611 transitions. [2020-10-15 16:23:55,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:55,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:55,522 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:55,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:55,723 INFO L429 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:55,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:55,724 INFO L82 PathProgramCache]: Analyzing trace with hash 163688120, now seen corresponding path program 28 times [2020-10-15 16:23:55,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:55,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132141568] [2020-10-15 16:23:55,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:56,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132141568] [2020-10-15 16:23:56,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990567138] [2020-10-15 16:23:56,063 INFO L93 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:56,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:23:56,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:56,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:23:56,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:56,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-15 16:23:56,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 18 [2020-10-15 16:23:56,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581500741] [2020-10-15 16:23:56,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:23:56,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:56,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:23:56,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:23:56,367 INFO L87 Difference]: Start difference. First operand 227 states and 611 transitions. Second operand 9 states. [2020-10-15 16:23:56,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:56,438 INFO L93 Difference]: Finished difference Result 338 states and 895 transitions. [2020-10-15 16:23:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:23:56,441 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-15 16:23:56,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:56,442 INFO L225 Difference]: With dead ends: 338 [2020-10-15 16:23:56,442 INFO L226 Difference]: Without dead ends: 312 [2020-10-15 16:23:56,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:23:56,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-15 16:23:56,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2020-10-15 16:23:56,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-15 16:23:56,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 836 transitions. [2020-10-15 16:23:56,447 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 836 transitions. Word has length 14 [2020-10-15 16:23:56,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:56,448 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 836 transitions. [2020-10-15 16:23:56,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:23:56,448 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 836 transitions. [2020-10-15 16:23:56,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:23:56,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:56,448 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:56,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2020-10-15 16:23:56,649 INFO L429 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:56,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:56,650 INFO L82 PathProgramCache]: Analyzing trace with hash 491277249, now seen corresponding path program 241 times [2020-10-15 16:23:56,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:56,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119297399] [2020-10-15 16:23:56,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:56,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119297399] [2020-10-15 16:23:56,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533756199] [2020-10-15 16:23:56,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:57,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:23:57,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:57,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:57,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:23:57,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193879744] [2020-10-15 16:23:57,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:23:57,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:57,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:23:57,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:23:57,462 INFO L87 Difference]: Start difference. First operand 312 states and 836 transitions. Second operand 19 states. [2020-10-15 16:23:57,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:57,642 INFO L93 Difference]: Finished difference Result 353 states and 914 transitions. [2020-10-15 16:23:57,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:23:57,644 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:23:57,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:57,645 INFO L225 Difference]: With dead ends: 353 [2020-10-15 16:23:57,645 INFO L226 Difference]: Without dead ends: 351 [2020-10-15 16:23:57,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:23:57,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-15 16:23:57,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 324. [2020-10-15 16:23:57,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-15 16:23:57,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 870 transitions. [2020-10-15 16:23:57,650 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 870 transitions. Word has length 15 [2020-10-15 16:23:57,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:57,650 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 870 transitions. [2020-10-15 16:23:57,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:23:57,650 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 870 transitions. [2020-10-15 16:23:57,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:23:57,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:57,651 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:57,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:57,852 INFO L429 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:57,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:57,852 INFO L82 PathProgramCache]: Analyzing trace with hash 491278210, now seen corresponding path program 242 times [2020-10-15 16:23:57,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:57,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639960323] [2020-10-15 16:23:57,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:58,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639960323] [2020-10-15 16:23:58,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511229425] [2020-10-15 16:23:58,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:58,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:23:58,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:58,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:23:58,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:58,708 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:58,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:58,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:23:58,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415384820] [2020-10-15 16:23:58,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:23:58,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:58,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:23:58,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:23:58,709 INFO L87 Difference]: Start difference. First operand 324 states and 870 transitions. Second operand 19 states. [2020-10-15 16:23:59,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:59,217 INFO L93 Difference]: Finished difference Result 377 states and 965 transitions. [2020-10-15 16:23:59,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:23:59,220 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:23:59,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:59,221 INFO L225 Difference]: With dead ends: 377 [2020-10-15 16:23:59,221 INFO L226 Difference]: Without dead ends: 374 [2020-10-15 16:23:59,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:23:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-10-15 16:23:59,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 325. [2020-10-15 16:23:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-15 16:23:59,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 873 transitions. [2020-10-15 16:23:59,226 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 873 transitions. Word has length 15 [2020-10-15 16:23:59,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:59,226 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 873 transitions. [2020-10-15 16:23:59,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:23:59,226 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 873 transitions. [2020-10-15 16:23:59,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:23:59,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:59,227 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:59,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-10-15 16:23:59,428 INFO L429 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:59,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:59,428 INFO L82 PathProgramCache]: Analyzing trace with hash 491307040, now seen corresponding path program 243 times [2020-10-15 16:23:59,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:59,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368494229] [2020-10-15 16:23:59,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:59,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368494229] [2020-10-15 16:23:59,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824774803] [2020-10-15 16:23:59,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:59,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:23:59,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:59,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:23:59,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:00,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:00,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:00,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23826061] [2020-10-15 16:24:00,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:00,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:00,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:00,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:24:00,417 INFO L87 Difference]: Start difference. First operand 325 states and 873 transitions. Second operand 19 states. [2020-10-15 16:24:01,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:01,188 INFO L93 Difference]: Finished difference Result 408 states and 1035 transitions. [2020-10-15 16:24:01,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:24:01,192 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:01,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:01,193 INFO L225 Difference]: With dead ends: 408 [2020-10-15 16:24:01,194 INFO L226 Difference]: Without dead ends: 404 [2020-10-15 16:24:01,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:24:01,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-15 16:24:01,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 327. [2020-10-15 16:24:01,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-15 16:24:01,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 879 transitions. [2020-10-15 16:24:01,199 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 879 transitions. Word has length 15 [2020-10-15 16:24:01,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:01,199 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 879 transitions. [2020-10-15 16:24:01,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:01,199 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 879 transitions. [2020-10-15 16:24:01,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:01,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:01,200 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:01,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:01,401 INFO L429 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:01,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:01,401 INFO L82 PathProgramCache]: Analyzing trace with hash 492200770, now seen corresponding path program 244 times [2020-10-15 16:24:01,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:01,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120631242] [2020-10-15 16:24:01,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:01,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120631242] [2020-10-15 16:24:01,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978029730] [2020-10-15 16:24:01,716 INFO L93 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:01,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:24:01,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:01,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:01,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:06,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:06,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:06,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999792785] [2020-10-15 16:24:06,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:06,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:06,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:06,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:24:06,531 INFO L87 Difference]: Start difference. First operand 327 states and 879 transitions. Second operand 19 states. [2020-10-15 16:24:07,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:07,431 INFO L93 Difference]: Finished difference Result 406 states and 1027 transitions. [2020-10-15 16:24:07,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:24:07,433 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:07,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:07,434 INFO L225 Difference]: With dead ends: 406 [2020-10-15 16:24:07,434 INFO L226 Difference]: Without dead ends: 403 [2020-10-15 16:24:07,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=244, Invalid=458, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:24:07,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-15 16:24:07,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 329. [2020-10-15 16:24:07,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-10-15 16:24:07,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 885 transitions. [2020-10-15 16:24:07,440 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 885 transitions. Word has length 15 [2020-10-15 16:24:07,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:07,440 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 885 transitions. [2020-10-15 16:24:07,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:07,440 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 885 transitions. [2020-10-15 16:24:07,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:07,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:07,441 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:07,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-10-15 16:24:07,651 INFO L429 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:07,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:07,652 INFO L82 PathProgramCache]: Analyzing trace with hash 492201731, now seen corresponding path program 245 times [2020-10-15 16:24:07,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:07,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089149189] [2020-10-15 16:24:07,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:07,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089149189] [2020-10-15 16:24:07,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114105746] [2020-10-15 16:24:07,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:08,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:24:08,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:08,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:08,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:12,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:12,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:12,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885624986] [2020-10-15 16:24:12,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:12,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:12,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:12,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=236, Unknown=1, NotChecked=0, Total=342 [2020-10-15 16:24:12,658 INFO L87 Difference]: Start difference. First operand 329 states and 885 transitions. Second operand 19 states. [2020-10-15 16:24:17,096 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-15 16:24:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:17,851 INFO L93 Difference]: Finished difference Result 437 states and 1102 transitions. [2020-10-15 16:24:17,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:24:17,855 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:17,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:17,856 INFO L225 Difference]: With dead ends: 437 [2020-10-15 16:24:17,856 INFO L226 Difference]: Without dead ends: 432 [2020-10-15 16:24:17,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=231, Invalid=470, Unknown=1, NotChecked=0, Total=702 [2020-10-15 16:24:17,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-15 16:24:17,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 330. [2020-10-15 16:24:17,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-15 16:24:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 888 transitions. [2020-10-15 16:24:17,861 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 888 transitions. Word has length 15 [2020-10-15 16:24:17,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:17,862 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 888 transitions. [2020-10-15 16:24:17,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:17,862 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 888 transitions. [2020-10-15 16:24:17,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:17,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:17,862 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:18,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:18,063 INFO L429 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:18,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:18,064 INFO L82 PathProgramCache]: Analyzing trace with hash 492230561, now seen corresponding path program 246 times [2020-10-15 16:24:18,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:18,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134480300] [2020-10-15 16:24:18,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:18,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134480300] [2020-10-15 16:24:18,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654700371] [2020-10-15 16:24:18,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:18,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:24:18,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:18,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:18,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:19,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:19,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:19,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:19,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124953159] [2020-10-15 16:24:19,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:19,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:19,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:19,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:24:19,120 INFO L87 Difference]: Start difference. First operand 330 states and 888 transitions. Second operand 19 states. [2020-10-15 16:24:20,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:20,051 INFO L93 Difference]: Finished difference Result 427 states and 1079 transitions. [2020-10-15 16:24:20,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:24:20,055 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:20,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:20,056 INFO L225 Difference]: With dead ends: 427 [2020-10-15 16:24:20,056 INFO L226 Difference]: Without dead ends: 423 [2020-10-15 16:24:20,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:24:20,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-15 16:24:20,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 330. [2020-10-15 16:24:20,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-15 16:24:20,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 888 transitions. [2020-10-15 16:24:20,062 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 888 transitions. Word has length 15 [2020-10-15 16:24:20,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:20,062 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 888 transitions. [2020-10-15 16:24:20,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:20,062 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 888 transitions. [2020-10-15 16:24:20,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:20,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:20,063 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:20,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:20,264 INFO L429 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:20,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:20,264 INFO L82 PathProgramCache]: Analyzing trace with hash 519906400, now seen corresponding path program 247 times [2020-10-15 16:24:20,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:20,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057776121] [2020-10-15 16:24:20,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:20,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057776121] [2020-10-15 16:24:20,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923592222] [2020-10-15 16:24:20,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:20,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:20,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:21,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:21,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:21,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057045475] [2020-10-15 16:24:21,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:21,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:21,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:21,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:24:21,380 INFO L87 Difference]: Start difference. First operand 330 states and 888 transitions. Second operand 19 states. [2020-10-15 16:24:22,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:22,575 INFO L93 Difference]: Finished difference Result 411 states and 1040 transitions. [2020-10-15 16:24:22,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:24:22,578 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:22,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:22,579 INFO L225 Difference]: With dead ends: 411 [2020-10-15 16:24:22,580 INFO L226 Difference]: Without dead ends: 408 [2020-10-15 16:24:22,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:24:22,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-10-15 16:24:22,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 333. [2020-10-15 16:24:22,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-15 16:24:22,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 897 transitions. [2020-10-15 16:24:22,585 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 897 transitions. Word has length 15 [2020-10-15 16:24:22,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:22,585 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 897 transitions. [2020-10-15 16:24:22,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:22,585 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 897 transitions. [2020-10-15 16:24:22,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:22,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:22,586 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:22,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2020-10-15 16:24:22,787 INFO L429 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:22,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:22,787 INFO L82 PathProgramCache]: Analyzing trace with hash 519907361, now seen corresponding path program 248 times [2020-10-15 16:24:22,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:22,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116478174] [2020-10-15 16:24:22,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:23,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116478174] [2020-10-15 16:24:23,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913029348] [2020-10-15 16:24:23,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:23,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:24:23,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:23,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:23,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:23,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:23,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:23,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041302361] [2020-10-15 16:24:23,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:23,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:23,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:23,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:24:23,814 INFO L87 Difference]: Start difference. First operand 333 states and 897 transitions. Second operand 19 states. [2020-10-15 16:24:24,670 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-15 16:24:25,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:25,065 INFO L93 Difference]: Finished difference Result 441 states and 1112 transitions. [2020-10-15 16:24:25,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:24:25,069 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:25,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:25,070 INFO L225 Difference]: With dead ends: 441 [2020-10-15 16:24:25,070 INFO L226 Difference]: Without dead ends: 436 [2020-10-15 16:24:25,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:24:25,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-15 16:24:25,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 333. [2020-10-15 16:24:25,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-15 16:24:25,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 897 transitions. [2020-10-15 16:24:25,076 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 897 transitions. Word has length 15 [2020-10-15 16:24:25,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:25,076 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 897 transitions. [2020-10-15 16:24:25,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:25,076 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 897 transitions. [2020-10-15 16:24:25,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:25,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:25,077 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:25,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:25,277 INFO L429 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:25,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:25,278 INFO L82 PathProgramCache]: Analyzing trace with hash 519936191, now seen corresponding path program 249 times [2020-10-15 16:24:25,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:25,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743198209] [2020-10-15 16:24:25,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:25,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743198209] [2020-10-15 16:24:25,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061499391] [2020-10-15 16:24:25,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:25,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:24:25,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:25,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:25,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:40,085 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-15 16:24:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:46,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:46,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:46,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286793637] [2020-10-15 16:24:46,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:46,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:46,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:46,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=234, Unknown=3, NotChecked=0, Total=342 [2020-10-15 16:24:46,627 INFO L87 Difference]: Start difference. First operand 333 states and 897 transitions. Second operand 19 states. [2020-10-15 16:24:51,059 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:25:02,532 WARN L193 SmtUtils]: Spent 897.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-10-15 16:25:04,857 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-10-15 16:25:10,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:10,212 INFO L93 Difference]: Finished difference Result 455 states and 1144 transitions. [2020-10-15 16:25:10,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:25:10,217 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:10,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:10,218 INFO L225 Difference]: With dead ends: 455 [2020-10-15 16:25:10,218 INFO L226 Difference]: Without dead ends: 450 [2020-10-15 16:25:10,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 35.5s TimeCoverageRelationStatistics Valid=253, Invalid=496, Unknown=7, NotChecked=0, Total=756 [2020-10-15 16:25:10,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-10-15 16:25:10,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 334. [2020-10-15 16:25:10,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-15 16:25:10,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 900 transitions. [2020-10-15 16:25:10,224 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 900 transitions. Word has length 15 [2020-10-15 16:25:10,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:10,224 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 900 transitions. [2020-10-15 16:25:10,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:10,224 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 900 transitions. [2020-10-15 16:25:10,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:10,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:10,224 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:10,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:10,425 INFO L429 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:10,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:10,426 INFO L82 PathProgramCache]: Analyzing trace with hash 520830882, now seen corresponding path program 250 times [2020-10-15 16:25:10,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:10,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202706784] [2020-10-15 16:25:10,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:10,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202706784] [2020-10-15 16:25:10,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753645532] [2020-10-15 16:25:10,746 INFO L93 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:10,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:25:10,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:10,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:10,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:12,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:12,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:12,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295661592] [2020-10-15 16:25:12,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:12,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:12,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:12,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:12,791 INFO L87 Difference]: Start difference. First operand 334 states and 900 transitions. Second operand 19 states. [2020-10-15 16:25:14,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:14,123 INFO L93 Difference]: Finished difference Result 464 states and 1169 transitions. [2020-10-15 16:25:14,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:25:14,128 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:14,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:14,129 INFO L225 Difference]: With dead ends: 464 [2020-10-15 16:25:14,129 INFO L226 Difference]: Without dead ends: 458 [2020-10-15 16:25:14,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:25:14,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-10-15 16:25:14,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 334. [2020-10-15 16:25:14,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-15 16:25:14,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 900 transitions. [2020-10-15 16:25:14,135 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 900 transitions. Word has length 15 [2020-10-15 16:25:14,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:14,135 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 900 transitions. [2020-10-15 16:25:14,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:14,135 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 900 transitions. [2020-10-15 16:25:14,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:14,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:14,135 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:14,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:14,336 INFO L429 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:14,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:14,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1378780930, now seen corresponding path program 251 times [2020-10-15 16:25:14,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:14,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220932520] [2020-10-15 16:25:14,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:14,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220932520] [2020-10-15 16:25:14,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205399968] [2020-10-15 16:25:14,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:14,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:25:14,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:14,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:14,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:15,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:15,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:15,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777568765] [2020-10-15 16:25:15,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:15,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:15,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:15,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:15,227 INFO L87 Difference]: Start difference. First operand 334 states and 900 transitions. Second operand 19 states. [2020-10-15 16:25:16,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:16,310 INFO L93 Difference]: Finished difference Result 414 states and 1047 transitions. [2020-10-15 16:25:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:25:16,313 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:16,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:16,314 INFO L225 Difference]: With dead ends: 414 [2020-10-15 16:25:16,314 INFO L226 Difference]: Without dead ends: 411 [2020-10-15 16:25:16,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:25:16,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-15 16:25:16,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 338. [2020-10-15 16:25:16,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-15 16:25:16,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 912 transitions. [2020-10-15 16:25:16,319 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 912 transitions. Word has length 15 [2020-10-15 16:25:16,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:16,319 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 912 transitions. [2020-10-15 16:25:16,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:16,319 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 912 transitions. [2020-10-15 16:25:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:16,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:16,320 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:16,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:16,520 INFO L429 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:16,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:16,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1378781891, now seen corresponding path program 252 times [2020-10-15 16:25:16,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:16,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544893629] [2020-10-15 16:25:16,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:16,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544893629] [2020-10-15 16:25:16,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628580296] [2020-10-15 16:25:16,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:16,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:25:16,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:16,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:16,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:17,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:17,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:17,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128448120] [2020-10-15 16:25:17,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:17,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:17,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:17,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:17,400 INFO L87 Difference]: Start difference. First operand 338 states and 912 transitions. Second operand 19 states. [2020-10-15 16:25:18,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:18,404 INFO L93 Difference]: Finished difference Result 441 states and 1109 transitions. [2020-10-15 16:25:18,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:25:18,406 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:18,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:18,407 INFO L225 Difference]: With dead ends: 441 [2020-10-15 16:25:18,408 INFO L226 Difference]: Without dead ends: 437 [2020-10-15 16:25:18,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:25:18,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-15 16:25:18,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 337. [2020-10-15 16:25:18,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-15 16:25:18,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 909 transitions. [2020-10-15 16:25:18,413 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 909 transitions. Word has length 15 [2020-10-15 16:25:18,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:18,413 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 909 transitions. [2020-10-15 16:25:18,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:18,413 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 909 transitions. [2020-10-15 16:25:18,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:18,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:18,414 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:18,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-10-15 16:25:18,615 INFO L429 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:18,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:18,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1378810721, now seen corresponding path program 253 times [2020-10-15 16:25:18,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:18,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837471172] [2020-10-15 16:25:18,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:18,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837471172] [2020-10-15 16:25:18,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914229801] [2020-10-15 16:25:18,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:18,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:18,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:19,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:19,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:19,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162859989] [2020-10-15 16:25:19,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:19,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:19,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:19,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:19,787 INFO L87 Difference]: Start difference. First operand 337 states and 909 transitions. Second operand 19 states. [2020-10-15 16:25:20,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:20,825 INFO L93 Difference]: Finished difference Result 454 states and 1141 transitions. [2020-10-15 16:25:20,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:25:20,827 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:20,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:20,828 INFO L225 Difference]: With dead ends: 454 [2020-10-15 16:25:20,828 INFO L226 Difference]: Without dead ends: 449 [2020-10-15 16:25:20,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:25:20,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-10-15 16:25:20,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 336. [2020-10-15 16:25:20,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-15 16:25:20,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 906 transitions. [2020-10-15 16:25:20,833 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 906 transitions. Word has length 15 [2020-10-15 16:25:20,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:20,833 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 906 transitions. [2020-10-15 16:25:20,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:20,834 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 906 transitions. [2020-10-15 16:25:20,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:20,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:20,834 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:21,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-10-15 16:25:21,035 INFO L429 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:21,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:21,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1379704451, now seen corresponding path program 254 times [2020-10-15 16:25:21,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:21,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503013659] [2020-10-15 16:25:21,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:21,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503013659] [2020-10-15 16:25:21,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83449303] [2020-10-15 16:25:21,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:21,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:25:21,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:21,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:21,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:21,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:21,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:21,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831917265] [2020-10-15 16:25:21,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:21,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:21,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:21,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:21,912 INFO L87 Difference]: Start difference. First operand 336 states and 906 transitions. Second operand 19 states. [2020-10-15 16:25:22,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:22,940 INFO L93 Difference]: Finished difference Result 464 states and 1163 transitions. [2020-10-15 16:25:22,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:25:22,942 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:22,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:22,943 INFO L225 Difference]: With dead ends: 464 [2020-10-15 16:25:22,943 INFO L226 Difference]: Without dead ends: 459 [2020-10-15 16:25:22,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:25:22,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-10-15 16:25:22,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 341. [2020-10-15 16:25:22,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-15 16:25:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 921 transitions. [2020-10-15 16:25:22,949 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 921 transitions. Word has length 15 [2020-10-15 16:25:22,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:22,949 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 921 transitions. [2020-10-15 16:25:22,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:22,949 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 921 transitions. [2020-10-15 16:25:22,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:22,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:22,949 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:23,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-10-15 16:25:23,150 INFO L429 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:23,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:23,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1379705412, now seen corresponding path program 255 times [2020-10-15 16:25:23,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:23,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084532] [2020-10-15 16:25:23,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:23,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084532] [2020-10-15 16:25:23,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992608018] [2020-10-15 16:25:23,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:23,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:25:23,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:23,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:23,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:23,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:23,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:23,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496217012] [2020-10-15 16:25:23,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:23,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:23,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:23,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:23,936 INFO L87 Difference]: Start difference. First operand 341 states and 921 transitions. Second operand 19 states. [2020-10-15 16:25:24,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:24,838 INFO L93 Difference]: Finished difference Result 475 states and 1194 transitions. [2020-10-15 16:25:24,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:25:24,842 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:24,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:24,843 INFO L225 Difference]: With dead ends: 475 [2020-10-15 16:25:24,843 INFO L226 Difference]: Without dead ends: 469 [2020-10-15 16:25:24,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:25:24,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-10-15 16:25:24,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 342. [2020-10-15 16:25:24,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-10-15 16:25:24,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 924 transitions. [2020-10-15 16:25:24,848 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 924 transitions. Word has length 15 [2020-10-15 16:25:24,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:24,848 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 924 transitions. [2020-10-15 16:25:24,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:24,849 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 924 transitions. [2020-10-15 16:25:24,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:24,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:24,849 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:25,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:25,050 INFO L429 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:25,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:25,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1379734242, now seen corresponding path program 256 times [2020-10-15 16:25:25,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:25,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068963806] [2020-10-15 16:25:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:25,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068963806] [2020-10-15 16:25:25,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866981065] [2020-10-15 16:25:25,398 INFO L93 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:25,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:25:25,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:25,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:25,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:25,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:25,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:25,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:25,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599728315] [2020-10-15 16:25:25,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:25,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:25,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:25,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:25,975 INFO L87 Difference]: Start difference. First operand 342 states and 924 transitions. Second operand 19 states. [2020-10-15 16:25:27,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:27,135 INFO L93 Difference]: Finished difference Result 474 states and 1199 transitions. [2020-10-15 16:25:27,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:25:27,140 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:27,141 INFO L225 Difference]: With dead ends: 474 [2020-10-15 16:25:27,141 INFO L226 Difference]: Without dead ends: 468 [2020-10-15 16:25:27,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:25:27,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-10-15 16:25:27,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 340. [2020-10-15 16:25:27,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-15 16:25:27,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 918 transitions. [2020-10-15 16:25:27,146 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 918 transitions. Word has length 15 [2020-10-15 16:25:27,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:27,146 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 918 transitions. [2020-10-15 16:25:27,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:27,146 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 918 transitions. [2020-10-15 16:25:27,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:27,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:27,146 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:27,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2020-10-15 16:25:27,347 INFO L429 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:27,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:27,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1407411042, now seen corresponding path program 257 times [2020-10-15 16:25:27,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:27,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858613789] [2020-10-15 16:25:27,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:27,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858613789] [2020-10-15 16:25:27,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123238671] [2020-10-15 16:25:27,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:27,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:25:27,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:27,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:27,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:28,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:28,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:28,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842631606] [2020-10-15 16:25:28,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:28,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:28,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:28,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:28,381 INFO L87 Difference]: Start difference. First operand 340 states and 918 transitions. Second operand 19 states. [2020-10-15 16:25:29,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:29,844 INFO L93 Difference]: Finished difference Result 478 states and 1207 transitions. [2020-10-15 16:25:29,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:25:29,848 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:29,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:29,850 INFO L225 Difference]: With dead ends: 478 [2020-10-15 16:25:29,850 INFO L226 Difference]: Without dead ends: 472 [2020-10-15 16:25:29,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:25:29,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-10-15 16:25:29,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 340. [2020-10-15 16:25:29,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-15 16:25:29,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 918 transitions. [2020-10-15 16:25:29,855 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 918 transitions. Word has length 15 [2020-10-15 16:25:29,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:29,855 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 918 transitions. [2020-10-15 16:25:29,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:29,855 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 918 transitions. [2020-10-15 16:25:29,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:29,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:29,856 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:30,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2020-10-15 16:25:30,057 INFO L429 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:30,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:30,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1407439872, now seen corresponding path program 258 times [2020-10-15 16:25:30,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:30,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408813079] [2020-10-15 16:25:30,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:30,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408813079] [2020-10-15 16:25:30,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141634401] [2020-10-15 16:25:30,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:30,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:25:30,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:30,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:30,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:40,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:40,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:40,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623552385] [2020-10-15 16:25:40,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:40,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:40,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:40,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-10-15 16:25:40,090 INFO L87 Difference]: Start difference. First operand 340 states and 918 transitions. Second operand 19 states. [2020-10-15 16:25:44,645 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-15 16:25:49,066 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-15 16:25:51,678 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-15 16:25:52,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:52,115 INFO L93 Difference]: Finished difference Result 461 states and 1164 transitions. [2020-10-15 16:25:52,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:25:52,119 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:52,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:52,120 INFO L225 Difference]: With dead ends: 461 [2020-10-15 16:25:52,120 INFO L226 Difference]: Without dead ends: 456 [2020-10-15 16:25:52,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=292, Invalid=636, Unknown=2, NotChecked=0, Total=930 [2020-10-15 16:25:52,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-10-15 16:25:52,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 338. [2020-10-15 16:25:52,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-15 16:25:52,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 912 transitions. [2020-10-15 16:25:52,125 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 912 transitions. Word has length 15 [2020-10-15 16:25:52,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:52,126 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 912 transitions. [2020-10-15 16:25:52,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:52,126 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 912 transitions. [2020-10-15 16:25:52,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:52,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:52,126 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:52,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:52,327 INFO L429 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:52,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:52,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1408364354, now seen corresponding path program 259 times [2020-10-15 16:25:52,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:52,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036139794] [2020-10-15 16:25:52,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:52,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036139794] [2020-10-15 16:25:52,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113649180] [2020-10-15 16:25:52,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:52,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:52,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:53,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:53,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:53,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807593732] [2020-10-15 16:25:53,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:53,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:53,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:53,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:53,204 INFO L87 Difference]: Start difference. First operand 338 states and 912 transitions. Second operand 19 states. [2020-10-15 16:25:54,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:54,122 INFO L93 Difference]: Finished difference Result 438 states and 1112 transitions. [2020-10-15 16:25:54,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:25:54,125 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:54,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:54,126 INFO L225 Difference]: With dead ends: 438 [2020-10-15 16:25:54,127 INFO L226 Difference]: Without dead ends: 417 [2020-10-15 16:25:54,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:25:54,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-15 16:25:54,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 339. [2020-10-15 16:25:54,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-15 16:25:54,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 907 transitions. [2020-10-15 16:25:54,131 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 907 transitions. Word has length 15 [2020-10-15 16:25:54,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:54,131 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 907 transitions. [2020-10-15 16:25:54,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:54,131 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 907 transitions. [2020-10-15 16:25:54,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:54,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:54,132 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:54,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:54,333 INFO L429 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:54,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:54,333 INFO L82 PathProgramCache]: Analyzing trace with hash -2060879712, now seen corresponding path program 260 times [2020-10-15 16:25:54,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:54,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123362668] [2020-10-15 16:25:54,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:54,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123362668] [2020-10-15 16:25:54,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893016894] [2020-10-15 16:25:54,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:54,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:25:54,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:54,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:54,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:55,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:55,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:55,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138374021] [2020-10-15 16:25:55,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:55,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:55,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:55,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:55,139 INFO L87 Difference]: Start difference. First operand 339 states and 907 transitions. Second operand 19 states. [2020-10-15 16:25:56,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:56,085 INFO L93 Difference]: Finished difference Result 406 states and 1029 transitions. [2020-10-15 16:25:56,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:25:56,089 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:56,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:56,090 INFO L225 Difference]: With dead ends: 406 [2020-10-15 16:25:56,091 INFO L226 Difference]: Without dead ends: 403 [2020-10-15 16:25:56,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:25:56,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-15 16:25:56,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 345. [2020-10-15 16:25:56,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-15 16:25:56,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 923 transitions. [2020-10-15 16:25:56,096 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 923 transitions. Word has length 15 [2020-10-15 16:25:56,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:56,096 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 923 transitions. [2020-10-15 16:25:56,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:56,096 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 923 transitions. [2020-10-15 16:25:56,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:56,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:56,097 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:56,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:56,297 INFO L429 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:56,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:56,297 INFO L82 PathProgramCache]: Analyzing trace with hash -2060878751, now seen corresponding path program 261 times [2020-10-15 16:25:56,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:56,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070725039] [2020-10-15 16:25:56,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:56,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070725039] [2020-10-15 16:25:56,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615959688] [2020-10-15 16:25:56,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:56,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:25:56,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:56,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:56,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:57,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:57,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:57,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347641068] [2020-10-15 16:25:57,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:57,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:57,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:57,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:57,124 INFO L87 Difference]: Start difference. First operand 345 states and 923 transitions. Second operand 19 states. [2020-10-15 16:25:58,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:58,136 INFO L93 Difference]: Finished difference Result 436 states and 1098 transitions. [2020-10-15 16:25:58,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:25:58,140 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:58,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:58,141 INFO L225 Difference]: With dead ends: 436 [2020-10-15 16:25:58,141 INFO L226 Difference]: Without dead ends: 432 [2020-10-15 16:25:58,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:25:58,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-15 16:25:58,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 344. [2020-10-15 16:25:58,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-15 16:25:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 920 transitions. [2020-10-15 16:25:58,146 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 920 transitions. Word has length 15 [2020-10-15 16:25:58,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:58,146 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 920 transitions. [2020-10-15 16:25:58,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:58,146 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 920 transitions. [2020-10-15 16:25:58,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:58,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:58,147 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:58,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable296 [2020-10-15 16:25:58,347 INFO L429 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:58,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:58,348 INFO L82 PathProgramCache]: Analyzing trace with hash -2060849921, now seen corresponding path program 262 times [2020-10-15 16:25:58,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:58,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489525517] [2020-10-15 16:25:58,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:58,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489525517] [2020-10-15 16:25:58,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017705748] [2020-10-15 16:25:58,643 INFO L93 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:58,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:25:58,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:58,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:58,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:03,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:03,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:03,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302105790] [2020-10-15 16:26:03,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:03,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:03,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:03,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:03,354 INFO L87 Difference]: Start difference. First operand 344 states and 920 transitions. Second operand 19 states. [2020-10-15 16:26:04,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:04,452 INFO L93 Difference]: Finished difference Result 452 states and 1133 transitions. [2020-10-15 16:26:04,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:26:04,456 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:04,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:04,457 INFO L225 Difference]: With dead ends: 452 [2020-10-15 16:26:04,457 INFO L226 Difference]: Without dead ends: 447 [2020-10-15 16:26:04,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:26:04,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-10-15 16:26:04,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 343. [2020-10-15 16:26:04,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-10-15 16:26:04,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 917 transitions. [2020-10-15 16:26:04,463 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 917 transitions. Word has length 15 [2020-10-15 16:26:04,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:04,463 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 917 transitions. [2020-10-15 16:26:04,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:04,463 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 917 transitions. [2020-10-15 16:26:04,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:04,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:04,464 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:04,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:04,665 INFO L429 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:04,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:04,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2059956191, now seen corresponding path program 263 times [2020-10-15 16:26:04,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:04,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044013258] [2020-10-15 16:26:04,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:04,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:04,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:04,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044013258] [2020-10-15 16:26:04,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195605540] [2020-10-15 16:26:04,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:05,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:26:05,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:05,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:05,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:05,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:05,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:05,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142749468] [2020-10-15 16:26:05,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:05,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:05,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:05,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:05,616 INFO L87 Difference]: Start difference. First operand 343 states and 917 transitions. Second operand 19 states. [2020-10-15 16:26:06,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:06,929 INFO L93 Difference]: Finished difference Result 451 states and 1130 transitions. [2020-10-15 16:26:06,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:26:06,933 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:06,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:06,934 INFO L225 Difference]: With dead ends: 451 [2020-10-15 16:26:06,934 INFO L226 Difference]: Without dead ends: 446 [2020-10-15 16:26:06,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:26:06,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-15 16:26:06,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 350. [2020-10-15 16:26:06,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-15 16:26:06,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 936 transitions. [2020-10-15 16:26:06,938 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 936 transitions. Word has length 15 [2020-10-15 16:26:06,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:06,938 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 936 transitions. [2020-10-15 16:26:06,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:06,939 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 936 transitions. [2020-10-15 16:26:06,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:06,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:06,939 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:07,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2020-10-15 16:26:07,140 INFO L429 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:07,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:07,140 INFO L82 PathProgramCache]: Analyzing trace with hash -2059955230, now seen corresponding path program 264 times [2020-10-15 16:26:07,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:07,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539246391] [2020-10-15 16:26:07,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:07,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539246391] [2020-10-15 16:26:07,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877794754] [2020-10-15 16:26:07,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:07,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:26:07,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:07,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:07,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:16,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:16,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:16,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272962186] [2020-10-15 16:26:16,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:16,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:16,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:16,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-10-15 16:26:16,481 INFO L87 Difference]: Start difference. First operand 350 states and 936 transitions. Second operand 19 states. [2020-10-15 16:26:21,187 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-15 16:26:25,428 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-15 16:26:27,819 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-15 16:26:28,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:28,689 INFO L93 Difference]: Finished difference Result 481 states and 1200 transitions. [2020-10-15 16:26:28,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:26:28,693 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:28,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:28,694 INFO L225 Difference]: With dead ends: 481 [2020-10-15 16:26:28,695 INFO L226 Difference]: Without dead ends: 475 [2020-10-15 16:26:28,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=292, Invalid=636, Unknown=2, NotChecked=0, Total=930 [2020-10-15 16:26:28,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-15 16:26:28,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 353. [2020-10-15 16:26:28,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-15 16:26:28,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 945 transitions. [2020-10-15 16:26:28,700 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 945 transitions. Word has length 15 [2020-10-15 16:26:28,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:28,700 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 945 transitions. [2020-10-15 16:26:28,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:28,700 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 945 transitions. [2020-10-15 16:26:28,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:28,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:28,701 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:28,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-10-15 16:26:28,901 INFO L429 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:28,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:28,902 INFO L82 PathProgramCache]: Analyzing trace with hash -2059926400, now seen corresponding path program 265 times [2020-10-15 16:26:28,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:28,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66805316] [2020-10-15 16:26:28,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:29,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66805316] [2020-10-15 16:26:29,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812911981] [2020-10-15 16:26:29,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:29,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:29,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:30,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:30,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:30,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913088363] [2020-10-15 16:26:30,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:30,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:30,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:30,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:30,030 INFO L87 Difference]: Start difference. First operand 353 states and 945 transitions. Second operand 19 states. [2020-10-15 16:26:31,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:31,760 INFO L93 Difference]: Finished difference Result 482 states and 1207 transitions. [2020-10-15 16:26:31,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:26:31,764 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:31,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:31,766 INFO L225 Difference]: With dead ends: 482 [2020-10-15 16:26:31,766 INFO L226 Difference]: Without dead ends: 476 [2020-10-15 16:26:31,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:26:31,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-10-15 16:26:31,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 351. [2020-10-15 16:26:31,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-15 16:26:31,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 939 transitions. [2020-10-15 16:26:31,772 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 939 transitions. Word has length 15 [2020-10-15 16:26:31,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:31,772 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 939 transitions. [2020-10-15 16:26:31,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:31,772 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 939 transitions. [2020-10-15 16:26:31,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:31,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:31,773 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:31,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2020-10-15 16:26:31,974 INFO L429 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:31,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:31,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2032250561, now seen corresponding path program 266 times [2020-10-15 16:26:31,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:31,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358484327] [2020-10-15 16:26:31,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:32,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358484327] [2020-10-15 16:26:32,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940555266] [2020-10-15 16:26:32,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:32,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:26:32,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:32,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:32,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:32,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:32,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:32,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930069474] [2020-10-15 16:26:32,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:32,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:32,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:32,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:32,838 INFO L87 Difference]: Start difference. First operand 351 states and 939 transitions. Second operand 19 states. [2020-10-15 16:26:34,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:34,130 INFO L93 Difference]: Finished difference Result 460 states and 1154 transitions. [2020-10-15 16:26:34,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:26:34,134 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:34,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:34,135 INFO L225 Difference]: With dead ends: 460 [2020-10-15 16:26:34,135 INFO L226 Difference]: Without dead ends: 455 [2020-10-15 16:26:34,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:26:34,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-10-15 16:26:34,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 356. [2020-10-15 16:26:34,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-15 16:26:34,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 952 transitions. [2020-10-15 16:26:34,141 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 952 transitions. Word has length 15 [2020-10-15 16:26:34,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:34,141 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 952 transitions. [2020-10-15 16:26:34,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:34,142 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 952 transitions. [2020-10-15 16:26:34,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:34,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:34,142 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:34,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-10-15 16:26:34,343 INFO L429 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:34,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:34,344 INFO L82 PathProgramCache]: Analyzing trace with hash -2032220770, now seen corresponding path program 267 times [2020-10-15 16:26:34,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:34,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871447447] [2020-10-15 16:26:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:34,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871447447] [2020-10-15 16:26:34,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986777677] [2020-10-15 16:26:34,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:34,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:26:34,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:34,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:34,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:35,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:35,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:35,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041873988] [2020-10-15 16:26:35,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:35,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:35,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:35,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:35,258 INFO L87 Difference]: Start difference. First operand 356 states and 952 transitions. Second operand 19 states. [2020-10-15 16:26:36,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:36,317 INFO L93 Difference]: Finished difference Result 481 states and 1200 transitions. [2020-10-15 16:26:36,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:26:36,321 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:36,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:36,323 INFO L225 Difference]: With dead ends: 481 [2020-10-15 16:26:36,323 INFO L226 Difference]: Without dead ends: 475 [2020-10-15 16:26:36,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:26:36,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-15 16:26:36,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 354. [2020-10-15 16:26:36,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-15 16:26:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 946 transitions. [2020-10-15 16:26:36,328 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 946 transitions. Word has length 15 [2020-10-15 16:26:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:36,328 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 946 transitions. [2020-10-15 16:26:36,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 946 transitions. [2020-10-15 16:26:36,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:36,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:36,329 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:36,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2020-10-15 16:26:36,530 INFO L429 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:36,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:36,530 INFO L82 PathProgramCache]: Analyzing trace with hash -2031296288, now seen corresponding path program 268 times [2020-10-15 16:26:36,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:36,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742972767] [2020-10-15 16:26:36,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:36,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742972767] [2020-10-15 16:26:36,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756023139] [2020-10-15 16:26:36,859 INFO L93 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:36,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:26:36,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:36,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:36,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:37,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:37,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:37,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416073530] [2020-10-15 16:26:37,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:37,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:37,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:37,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:37,369 INFO L87 Difference]: Start difference. First operand 354 states and 946 transitions. Second operand 19 states. [2020-10-15 16:26:38,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:38,623 INFO L93 Difference]: Finished difference Result 442 states and 1116 transitions. [2020-10-15 16:26:38,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:26:38,628 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:38,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:38,629 INFO L225 Difference]: With dead ends: 442 [2020-10-15 16:26:38,629 INFO L226 Difference]: Without dead ends: 423 [2020-10-15 16:26:38,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:26:38,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-15 16:26:38,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 352. [2020-10-15 16:26:38,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-15 16:26:38,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 940 transitions. [2020-10-15 16:26:38,635 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 940 transitions. Word has length 15 [2020-10-15 16:26:38,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:38,635 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 940 transitions. [2020-10-15 16:26:38,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:38,635 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 940 transitions. [2020-10-15 16:26:38,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:38,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:38,636 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:38,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2020-10-15 16:26:38,836 INFO L429 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:38,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:38,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1173375070, now seen corresponding path program 269 times [2020-10-15 16:26:38,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:38,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421174011] [2020-10-15 16:26:38,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:39,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421174011] [2020-10-15 16:26:39,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978757743] [2020-10-15 16:26:39,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:39,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:26:39,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:39,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:39,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:39,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:39,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:39,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274313942] [2020-10-15 16:26:39,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:39,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:39,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:39,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:39,963 INFO L87 Difference]: Start difference. First operand 352 states and 940 transitions. Second operand 19 states. [2020-10-15 16:26:40,248 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-15 16:26:41,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:41,215 INFO L93 Difference]: Finished difference Result 456 states and 1147 transitions. [2020-10-15 16:26:41,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:26:41,220 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:41,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:41,221 INFO L225 Difference]: With dead ends: 456 [2020-10-15 16:26:41,222 INFO L226 Difference]: Without dead ends: 450 [2020-10-15 16:26:41,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:26:41,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-10-15 16:26:41,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 350. [2020-10-15 16:26:41,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-15 16:26:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 934 transitions. [2020-10-15 16:26:41,227 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 934 transitions. Word has length 15 [2020-10-15 16:26:41,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:41,227 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 934 transitions. [2020-10-15 16:26:41,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:41,227 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 934 transitions. [2020-10-15 16:26:41,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:41,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:41,228 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:41,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2020-10-15 16:26:41,428 INFO L429 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:41,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:41,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1173345279, now seen corresponding path program 270 times [2020-10-15 16:26:41,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:41,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504080213] [2020-10-15 16:26:41,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:41,862 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:41,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504080213] [2020-10-15 16:26:41,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542018967] [2020-10-15 16:26:41,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:41,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:26:41,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:41,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:41,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:44,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:44,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:44,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186915162] [2020-10-15 16:26:44,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:44,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:44,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:44,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:44,852 INFO L87 Difference]: Start difference. First operand 350 states and 934 transitions. Second operand 19 states. [2020-10-15 16:26:45,122 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-15 16:26:46,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:46,671 INFO L93 Difference]: Finished difference Result 466 states and 1163 transitions. [2020-10-15 16:26:46,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:26:46,676 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:46,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:46,677 INFO L225 Difference]: With dead ends: 466 [2020-10-15 16:26:46,677 INFO L226 Difference]: Without dead ends: 446 [2020-10-15 16:26:46,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=291, Invalid=579, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:26:46,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-15 16:26:46,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 345. [2020-10-15 16:26:46,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-15 16:26:46,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 919 transitions. [2020-10-15 16:26:46,684 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 919 transitions. Word has length 15 [2020-10-15 16:26:46,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:46,684 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 919 transitions. [2020-10-15 16:26:46,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:46,684 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 919 transitions. [2020-10-15 16:26:46,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:46,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:46,684 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:46,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:46,885 INFO L429 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:46,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:46,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1143823359, now seen corresponding path program 271 times [2020-10-15 16:26:46,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:46,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662304936] [2020-10-15 16:26:46,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:47,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662304936] [2020-10-15 16:26:47,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125577748] [2020-10-15 16:26:47,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:47,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:47,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:48,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:48,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:48,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:48,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372745891] [2020-10-15 16:26:48,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:48,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:48,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:48,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:48,148 INFO L87 Difference]: Start difference. First operand 345 states and 919 transitions. Second operand 19 states. [2020-10-15 16:26:48,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:48,942 INFO L93 Difference]: Finished difference Result 437 states and 1106 transitions. [2020-10-15 16:26:48,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:26:48,945 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:48,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:48,946 INFO L225 Difference]: With dead ends: 437 [2020-10-15 16:26:48,946 INFO L226 Difference]: Without dead ends: 422 [2020-10-15 16:26:48,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=214, Invalid=436, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:26:48,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-15 16:26:48,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 350. [2020-10-15 16:26:48,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-15 16:26:48,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 928 transitions. [2020-10-15 16:26:48,952 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 928 transitions. Word has length 15 [2020-10-15 16:26:48,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:48,952 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 928 transitions. [2020-10-15 16:26:48,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:48,953 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 928 transitions. [2020-10-15 16:26:48,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:48,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:48,953 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:49,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2020-10-15 16:26:49,165 INFO L429 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:49,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:49,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1143822398, now seen corresponding path program 272 times [2020-10-15 16:26:49,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:49,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047583289] [2020-10-15 16:26:49,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:49,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047583289] [2020-10-15 16:26:49,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520552906] [2020-10-15 16:26:49,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:49,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:26:49,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:49,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:49,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:50,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:50,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:50,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590691950] [2020-10-15 16:26:50,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:50,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:50,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:50,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:50,389 INFO L87 Difference]: Start difference. First operand 350 states and 928 transitions. Second operand 19 states. [2020-10-15 16:26:51,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:51,281 INFO L93 Difference]: Finished difference Result 433 states and 1087 transitions. [2020-10-15 16:26:51,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:26:51,286 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:51,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:51,287 INFO L225 Difference]: With dead ends: 433 [2020-10-15 16:26:51,287 INFO L226 Difference]: Without dead ends: 417 [2020-10-15 16:26:51,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:26:51,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-15 16:26:51,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 349. [2020-10-15 16:26:51,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-15 16:26:51,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 925 transitions. [2020-10-15 16:26:51,293 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 925 transitions. Word has length 15 [2020-10-15 16:26:51,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:51,293 INFO L481 AbstractCegarLoop]: Abstraction has 349 states and 925 transitions. [2020-10-15 16:26:51,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:51,293 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 925 transitions. [2020-10-15 16:26:51,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:51,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:51,294 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:51,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:51,495 INFO L429 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:51,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:51,495 INFO L82 PathProgramCache]: Analyzing trace with hash 439565519, now seen corresponding path program 273 times [2020-10-15 16:26:51,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:51,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77298368] [2020-10-15 16:26:51,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:51,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:52,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77298368] [2020-10-15 16:26:52,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142664547] [2020-10-15 16:26:52,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:52,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:26:52,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:52,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:52,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:52,670 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:52,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:52,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:52,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616333726] [2020-10-15 16:26:52,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:52,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:52,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:52,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:52,671 INFO L87 Difference]: Start difference. First operand 349 states and 925 transitions. Second operand 19 states. [2020-10-15 16:26:52,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:52,946 INFO L93 Difference]: Finished difference Result 394 states and 1001 transitions. [2020-10-15 16:26:52,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:26:52,951 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:52,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:52,952 INFO L225 Difference]: With dead ends: 394 [2020-10-15 16:26:52,953 INFO L226 Difference]: Without dead ends: 392 [2020-10-15 16:26:52,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:26:52,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-10-15 16:26:52,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 357. [2020-10-15 16:26:52,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-15 16:26:52,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 949 transitions. [2020-10-15 16:26:52,958 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 949 transitions. Word has length 15 [2020-10-15 16:26:52,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:52,958 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 949 transitions. [2020-10-15 16:26:52,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:52,958 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 949 transitions. [2020-10-15 16:26:52,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:52,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:52,958 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:53,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:53,159 INFO L429 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:53,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:53,160 INFO L82 PathProgramCache]: Analyzing trace with hash 439566480, now seen corresponding path program 274 times [2020-10-15 16:26:53,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:53,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631959864] [2020-10-15 16:26:53,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:53,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631959864] [2020-10-15 16:26:53,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423061149] [2020-10-15 16:26:53,711 INFO L93 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 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:53,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:26:53,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:53,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:53,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:54,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:54,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:54,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338683743] [2020-10-15 16:26:54,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:54,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:54,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:54,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:54,313 INFO L87 Difference]: Start difference. First operand 357 states and 949 transitions. Second operand 19 states. [2020-10-15 16:26:55,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:55,178 INFO L93 Difference]: Finished difference Result 420 states and 1064 transitions. [2020-10-15 16:26:55,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:26:55,183 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:55,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:55,184 INFO L225 Difference]: With dead ends: 420 [2020-10-15 16:26:55,184 INFO L226 Difference]: Without dead ends: 417 [2020-10-15 16:26:55,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:26:55,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-15 16:26:55,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 355. [2020-10-15 16:26:55,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-15 16:26:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2020-10-15 16:26:55,189 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 15 [2020-10-15 16:26:55,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:55,189 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2020-10-15 16:26:55,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:55,189 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2020-10-15 16:26:55,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:55,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:55,190 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:55,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:55,392 INFO L429 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:55,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:55,393 INFO L82 PathProgramCache]: Analyzing trace with hash 439595310, now seen corresponding path program 275 times [2020-10-15 16:26:55,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:55,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305377160] [2020-10-15 16:26:55,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:55,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:55,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305377160] [2020-10-15 16:26:55,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830926778] [2020-10-15 16:26:55,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:55,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:26:55,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:55,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:55,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:56,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:56,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:56,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639856594] [2020-10-15 16:26:56,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:56,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:56,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:56,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:56,544 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand 19 states. [2020-10-15 16:26:57,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:57,643 INFO L93 Difference]: Finished difference Result 452 states and 1140 transitions. [2020-10-15 16:26:57,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:26:57,648 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:57,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:57,650 INFO L225 Difference]: With dead ends: 452 [2020-10-15 16:26:57,650 INFO L226 Difference]: Without dead ends: 448 [2020-10-15 16:26:57,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:26:57,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-10-15 16:26:57,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 353. [2020-10-15 16:26:57,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-15 16:26:57,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 937 transitions. [2020-10-15 16:26:57,655 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 937 transitions. Word has length 15 [2020-10-15 16:26:57,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:57,655 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 937 transitions. [2020-10-15 16:26:57,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:57,655 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 937 transitions. [2020-10-15 16:26:57,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:57,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:57,656 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:57,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2020-10-15 16:26:57,856 INFO L429 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:57,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:57,857 INFO L82 PathProgramCache]: Analyzing trace with hash 440489040, now seen corresponding path program 276 times [2020-10-15 16:26:57,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:57,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622143485] [2020-10-15 16:26:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:58,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622143485] [2020-10-15 16:26:58,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907978812] [2020-10-15 16:26:58,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:58,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:26:58,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:58,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:58,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:03,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:03,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:27:03,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168413635] [2020-10-15 16:27:03,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:27:03,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:03,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:27:03,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:27:03,819 INFO L87 Difference]: Start difference. First operand 353 states and 937 transitions. Second operand 19 states. [2020-10-15 16:27:05,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:05,228 INFO L93 Difference]: Finished difference Result 446 states and 1118 transitions. [2020-10-15 16:27:05,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:27:05,233 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:27:05,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:05,235 INFO L225 Difference]: With dead ends: 446 [2020-10-15 16:27:05,235 INFO L226 Difference]: Without dead ends: 443 [2020-10-15 16:27:05,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:27:05,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-10-15 16:27:05,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 355. [2020-10-15 16:27:05,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-15 16:27:05,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2020-10-15 16:27:05,240 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 15 [2020-10-15 16:27:05,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:05,241 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2020-10-15 16:27:05,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:27:05,241 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2020-10-15 16:27:05,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:27:05,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:05,241 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:05,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2020-10-15 16:27:05,442 INFO L429 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:05,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:05,443 INFO L82 PathProgramCache]: Analyzing trace with hash 440490001, now seen corresponding path program 277 times [2020-10-15 16:27:05,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:05,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450793714] [2020-10-15 16:27:05,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:05,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450793714] [2020-10-15 16:27:05,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728690453] [2020-10-15 16:27:05,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:05,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:27:05,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:10,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:10,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:10,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:27:10,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124828425] [2020-10-15 16:27:10,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:27:10,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:10,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:27:10,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=251, Unknown=1, NotChecked=0, Total=342 [2020-10-15 16:27:10,663 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand 19 states. [2020-10-15 16:27:15,219 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-15 16:27:16,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:16,226 INFO L93 Difference]: Finished difference Result 483 states and 1210 transitions. [2020-10-15 16:27:16,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:27:16,231 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:27:16,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:16,232 INFO L225 Difference]: With dead ends: 483 [2020-10-15 16:27:16,232 INFO L226 Difference]: Without dead ends: 478 [2020-10-15 16:27:16,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=256, Invalid=555, Unknown=1, NotChecked=0, Total=812 [2020-10-15 16:27:16,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-10-15 16:27:16,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 355. [2020-10-15 16:27:16,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-15 16:27:16,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2020-10-15 16:27:16,238 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 15 [2020-10-15 16:27:16,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:16,238 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2020-10-15 16:27:16,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:27:16,238 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2020-10-15 16:27:16,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:27:16,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:16,239 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:16,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2020-10-15 16:27:16,439 INFO L429 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:16,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:16,440 INFO L82 PathProgramCache]: Analyzing trace with hash 440518831, now seen corresponding path program 278 times [2020-10-15 16:27:16,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:16,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028772476] [2020-10-15 16:27:16,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:16,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:16,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028772476] [2020-10-15 16:27:16,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672139825] [2020-10-15 16:27:16,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:16,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:27:16,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:16,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:27:16,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:17,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:17,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:27:17,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705246717] [2020-10-15 16:27:17,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:27:17,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:17,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:27:17,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:27:17,721 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand 19 states. [2020-10-15 16:27:19,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:19,125 INFO L93 Difference]: Finished difference Result 469 states and 1175 transitions. [2020-10-15 16:27:19,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:27:19,129 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:27:19,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:19,130 INFO L225 Difference]: With dead ends: 469 [2020-10-15 16:27:19,131 INFO L226 Difference]: Without dead ends: 465 [2020-10-15 16:27:19,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:27:19,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-15 16:27:19,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 351. [2020-10-15 16:27:19,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-15 16:27:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 931 transitions. [2020-10-15 16:27:19,136 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 931 transitions. Word has length 15 [2020-10-15 16:27:19,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:19,136 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 931 transitions. [2020-10-15 16:27:19,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:27:19,136 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 931 transitions. [2020-10-15 16:27:19,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:27:19,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:19,137 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:19,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2020-10-15 16:27:19,338 INFO L429 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:19,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:19,338 INFO L82 PathProgramCache]: Analyzing trace with hash 468194670, now seen corresponding path program 279 times [2020-10-15 16:27:19,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:19,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445028323] [2020-10-15 16:27:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:19,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445028323] [2020-10-15 16:27:19,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745344719] [2020-10-15 16:27:19,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:19,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:27:19,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:19,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:27:19,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:24,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:24,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:27:24,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483298795] [2020-10-15 16:27:24,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:27:24,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:24,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:27:24,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:27:24,473 INFO L87 Difference]: Start difference. First operand 351 states and 931 transitions. Second operand 19 states. [2020-10-15 16:27:26,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:26,291 INFO L93 Difference]: Finished difference Result 440 states and 1101 transitions. [2020-10-15 16:27:26,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:27:26,296 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:27:26,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:26,297 INFO L225 Difference]: With dead ends: 440 [2020-10-15 16:27:26,297 INFO L226 Difference]: Without dead ends: 437 [2020-10-15 16:27:26,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=312, Invalid=680, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:27:26,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-15 16:27:26,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 354. [2020-10-15 16:27:26,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-15 16:27:26,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 940 transitions. [2020-10-15 16:27:26,303 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 940 transitions. Word has length 15 [2020-10-15 16:27:26,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:26,304 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 940 transitions. [2020-10-15 16:27:26,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:27:26,304 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 940 transitions. [2020-10-15 16:27:26,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:27:26,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:26,305 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:26,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:26,507 INFO L429 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:26,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:26,507 INFO L82 PathProgramCache]: Analyzing trace with hash 468195631, now seen corresponding path program 280 times [2020-10-15 16:27:26,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:26,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402177265] [2020-10-15 16:27:26,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:26,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402177265] [2020-10-15 16:27:26,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838925731] [2020-10-15 16:27:26,948 INFO L93 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 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:26,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:27:26,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:26,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:27:26,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:27,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:27,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:27:27,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500058480] [2020-10-15 16:27:27,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:27:27,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:27,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:27:27,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:27:27,740 INFO L87 Difference]: Start difference. First operand 354 states and 940 transitions. Second operand 19 states. [2020-10-15 16:27:29,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:29,506 INFO L93 Difference]: Finished difference Result 478 states and 1194 transitions. [2020-10-15 16:27:29,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:27:29,511 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:27:29,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:29,512 INFO L225 Difference]: With dead ends: 478 [2020-10-15 16:27:29,512 INFO L226 Difference]: Without dead ends: 473 [2020-10-15 16:27:29,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=291, Invalid=639, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:27:29,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2020-10-15 16:27:29,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 354. [2020-10-15 16:27:29,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-15 16:27:29,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 940 transitions. [2020-10-15 16:27:29,519 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 940 transitions. Word has length 15 [2020-10-15 16:27:29,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:29,519 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 940 transitions. [2020-10-15 16:27:29,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:27:29,519 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 940 transitions. [2020-10-15 16:27:29,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:27:29,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:29,520 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:29,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2020-10-15 16:27:29,734 INFO L429 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:29,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:29,734 INFO L82 PathProgramCache]: Analyzing trace with hash 468224461, now seen corresponding path program 281 times [2020-10-15 16:27:29,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:29,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444803172] [2020-10-15 16:27:29,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:30,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444803172] [2020-10-15 16:27:30,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436338879] [2020-10-15 16:27:30,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:30,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:27:30,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:30,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:27:30,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:37,376 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-10-15 16:27:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:45,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:45,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:27:45,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169373772] [2020-10-15 16:27:45,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:27:45,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:45,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:27:45,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=250, Unknown=3, NotChecked=0, Total=342 [2020-10-15 16:27:45,475 INFO L87 Difference]: Start difference. First operand 354 states and 940 transitions. Second operand 19 states. [2020-10-15 16:27:49,995 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 Received shutdown request... [2020-10-15 16:27:54,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:27:54,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2020-10-15 16:27:54,923 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-15 16:27:54,927 WARN L235 ceAbstractionStarter]: Timeout [2020-10-15 16:27:54,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 04:27:54 BasicIcfg [2020-10-15 16:27:54,928 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 16:27:54,929 INFO L168 Benchmark]: Toolchain (without parser) took 872604.72 ms. Allocated memory was 246.4 MB in the beginning and 213.4 MB in the end (delta: -33.0 MB). Free memory was 201.5 MB in the beginning and 135.4 MB in the end (delta: 66.2 MB). Peak memory consumption was 33.1 MB. Max. memory is 14.2 GB. [2020-10-15 16:27:54,930 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 246.4 MB. Free memory is still 222.8 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 16:27:54,930 INFO L168 Benchmark]: CACSL2BoogieTranslator took 607.41 ms. Allocated memory was 246.4 MB in the beginning and 302.0 MB in the end (delta: 55.6 MB). Free memory was 201.5 MB in the beginning and 257.7 MB in the end (delta: -56.2 MB). Peak memory consumption was 29.7 MB. Max. memory is 14.2 GB. [2020-10-15 16:27:54,930 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.16 ms. Allocated memory is still 302.0 MB. Free memory was 257.7 MB in the beginning and 255.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 16:27:54,930 INFO L168 Benchmark]: Boogie Preprocessor took 29.56 ms. Allocated memory is still 302.0 MB. Free memory is still 255.2 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 16:27:54,930 INFO L168 Benchmark]: RCFGBuilder took 403.76 ms. Allocated memory is still 302.0 MB. Free memory was 255.2 MB in the beginning and 233.4 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-15 16:27:54,931 INFO L168 Benchmark]: TraceAbstraction took 871509.64 ms. Allocated memory was 302.0 MB in the beginning and 213.4 MB in the end (delta: -88.6 MB). Free memory was 233.4 MB in the beginning and 135.4 MB in the end (delta: 98.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 14.2 GB. [2020-10-15 16:27:54,933 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 246.4 MB. Free memory is still 222.8 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 607.41 ms. Allocated memory was 246.4 MB in the beginning and 302.0 MB in the end (delta: 55.6 MB). Free memory was 201.5 MB in the beginning and 257.7 MB in the end (delta: -56.2 MB). Peak memory consumption was 29.7 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 48.16 ms. Allocated memory is still 302.0 MB. Free memory was 257.7 MB in the beginning and 255.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 29.56 ms. Allocated memory is still 302.0 MB. Free memory is still 255.2 MB. There was no memory consumed. Max. memory is 14.2 GB. * RCFGBuilder took 403.76 ms. Allocated memory is still 302.0 MB. Free memory was 255.2 MB in the beginning and 233.4 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 871509.64 ms. Allocated memory was 302.0 MB in the beginning and 213.4 MB in the end (delta: -88.6 MB). Free memory was 233.4 MB in the beginning and 135.4 MB in the end (delta: 98.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 697 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 12 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 59 PlacesBefore, 20 PlacesAfterwards, 57 TransitionsBefore, 16 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 50 TotalNumberOfCompositions, 943 MoverChecksTotal - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (354states) and FLOYD_HOARE automaton (currently 14 states, 19 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 26 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 871.3s, OverallIterations: 317, TraceHistogramMax: 7, AutomataDifference: 532.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 4179 SDtfs, 37133 SDslu, 32729 SDs, 0 SdLazy, 23366 SolverSat, 9846 SolverUnsat, 62 SolverUnknown, 0 SolverNotchecked, 154.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9347 GetRequests, 1539 SyntacticMatches, 286 SemanticMatches, 7521 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51382 ImplicationChecksByTransitivity, 600.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=357occurred in iteration=309, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 316 MinimizatonAttempts, 20721 StatesRemovedByMinimization, 314 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 4.8s SatisfiabilityAnalysisTime, 256.4s InterpolantComputationTime, 8308 NumberOfCodeBlocks, 8306 NumberOfCodeBlocksAsserted, 1006 NumberOfCheckSat, 7682 ConstructedInterpolants, 51 QuantifiedInterpolants, 892556 SizeOfPredicates, 307 NumberOfNonLiveVariables, 27976 ConjunctsInSsa, 3218 ConjunctsInUnsatCore, 626 InterpolantComputations, 10 PerfectInterpolantSequences, 42/3966 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